GRW Ball Bearings from a Leading UK Supplier

As a trusted UK distributor of GRW bearings, we deliver precision-engineered solutions to meet both technical and commercial requirements. Whether you need bespoke designs for ultra-high precision projects or readily available components, rely on our expertise honed since 1938.

Uncompromising Quality in GRW Bearings

We provide an extensive range of GRW ball bearings, engineered to handle complex applications without sacrificing affordability or performance. With over 80 years of refined quality standards, we ensure dependable results in the most demanding industries.

Bearing product range

A complete range of ball bearings from GRW and configurations designed to carry load, reduce friction and support rotating and oscillating systems in any application.

See the full catalogue of GRW bearings by IEC

Get your bearings

Utilise our customised Bearing Selector tool here.

Markets

IEC have a range of mechanical solutions to suit a broad spectrum of markets and applications, from aerospace to skateboards.

Markets

IEC have a range of mechanical solutions to suit a broad spectrum of markets and applications, from aerospace to skateboards.

Markets

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Case Studies

We act as partners, making our customers’ engineering challenges ours to solve, removing stress and freeing up time to turn ideas in to innovation.

Product:

Bearings

Application:

High pressure pure air generators

Challenge:

High pressure pure air generators are designed to replace rechargeable gas bottles on modern military aircraft. The system draws in atmospheric air to provide a continuous supply of high-pressure pure air, which results in unlimited mission duration and eliminates the logistics burden associated with gas bottles.

Solution:

For critical applications, reliability and resilience is paramount. IEC supplied components are capable of operating with high degrees of accuracy under extreme load.

Product:

Bearings

Application:

Co-ordinate measuring machines (CMM)

Challenge:

5-axis measurement represents the biggest step-change in measurement capability ever introduced, delivering unprecedented speed and measurement flexibility, whilst avoiding the speed versus accuracy compromises inherent in conventional techniques.

Solution:

Duty of CMMs is generally low hence there is intermittent operation of bearings. Machines do require high reliability so products are tested and developed continuously, meaning technical support from bearing OEMs is critical. Some bearings are supplied with specific profiled outer ring designs.

Product:

Bearings

Application:

Peristaltic pump

Challenge:

Peristaltic pumps use occlusion rollers and positive displacement to feed fluid in industrial and medical applications, regulating flow and eliminating the need for valves. Bearings fitted in occlusion rollers have a cycle of coming on and off load with the potential to skip.

Solution:

It is important to select a bearing with high quality machining of its raceways to allow the bearing to readily accept these changes in state.

Download technical documents and brochures.

Keep up to date with the latest product and technical information from IEC and its international supply partners.

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GRW Bearings Catalogue

HIGH PRECISION BALL BEARINGS by GRW

GRW manufactures high precision ball bearings with bores of up to 30mm and inch series from 0.040″ to 0.500″. These bearings are available in plain and flanged executions and can be supplied open, or with shields or seals, ensuring versatility for various applications.

High precision ball bearings from GRW are produced to the highest quality standards, with grades up to ISO P4A or ABEC 9, making them exceptionally suitable for demanding precision requirements. Typical applications include missile guidance systems, electric motor parts, encoders, and precision instrumentation of all types. These bearings are designed to provide reliable performance in critical applications where accuracy and durability are paramount.

The exclusive SV material used in GRW high precision ball bearings offers exceptional corrosion resistance, making it ideal for hybrid bearings (ceramic balls) and high-speed spindle bearings. These specialised bearings are available in bore sizes ranging from 3mm to 17mm, catering to specific high-speed and high-precision applications.

GRW also offers standard sizes with special features, special sizes, duplex, and super duplex configurations. In addition, customised ball bearing assemblies are available to meet unique application needs. This ISO9001:2008-approved company ensures that all bearings meet stringent quality standards, providing peace of mind and reliability for engineers and designers.

Benefits of GRW High Precision Ball Bearings:

Exceptional Accuracy: Manufactured to ISO P4A or ABEC 9 standards, ensuring precise performance.
Versatile Configurations: Available in plain and flanged executions, with options for shields or seals.
Corrosion Resistance: The exclusive SV material provides outstanding resistance to corrosion, enhancing longevity.
High-Speed Performance: Ideal for high-speed applications with hybrid bearings (ceramic balls) and spindle bearings.
Custom Solutions: GRW offers customised ball bearing assemblies to meet specific application requirements.
Reliability: Produced by an ISO9001:2008-approved company, guaranteeing high quality and dependable performance.

Whether you need bearings for aerospace parts, precision medical components, robotics, or precision instruments, GRW’s high precision ball bearings are engineered to meet the most demanding specifications. The combination of high accuracy, versatile configurations, and robust materials ensures that these bearings can handle the toughest applications with ease.

For more information on GRW’s high precision ball bearings and to discuss your specific application needs, please contact us. Our team of experts is ready to provide the guidance and support necessary to find the perfect bearing solution for your project.

DEEP GROOVE ball bearings INDEX

Click on tick to open page	Standard Open Ball Bearings				2Z & 2RZ Shield Ball Bearings
Bearing Series	Open	Open with Flange	Open with Extended Inner Ring	Open Flange with Extended Inner Ring	Shield	Shield with Flange	Shield with Extended Inner Ring	Flange Shield with Extended Inner Ring
Metric
Inch

Click on tick to open page	Sealed Ball Bearings
Bearing Series	2TS Seal	2TS Seal with Flange	2TS Seal with Extended Inner Ring	2TS Seal with Flange & Extended Inner Ring	2RS Seal	2RS Seal with Flange	2RS Seal with Extended Inner Ring	2RS Seal with Flange & Extended Inner Ring
Metric
Inch

Shims & Spring Washers
(Stainless Steel sheet AISI 420, heat treated, without burrs, finest surface quality)

Dimensions (mm)					Used for
Shims		Spring Washers			Used for
d x D	S1	d x D	H	S	Shaft Types	Housing Types
AS2.25X3.20	0.08 0.10	WF2.15X3.10	0.50	0.08	682; 692; 5/64	1016
AS2.80X3.90	0.08 0.10	WF2.70X3.80	0.50	0.08	60/2.2; 68/2.5; 69/2.5; 3/32	68/1.5; 691; 1191
AS3.30X4.40	0.08 0.10 0.12	WF3.20X4.30	0.50	0.10	623; 683; 693; 1/8A; 1/8B; 3173; 1/8A/6; 1/8B/083
AS3.80X4.90	0.08 0.10 0.12	WF3.70X4.80	0.55	0.10		682; 69/1.5
AS4.30X5.85	0.10 0.12 0.15	WF4.20X5.75	0.65	0.12	604; 624; 634; 684; 694	68/2.5; 692; 3967
AS4.90X6.20	0.10 0.12 0.15	WF4.80X6.10	0.60	0.12	3/16; 4763A; 4763B	5/64; 3175
AS5.30X6.85	0.10 0.12 0.15	WF5.20X6.75	0.65	0.12	625; 635; 685; 695	683; 69/2.5
AS6.30X7.85	0.12 0.15 0.18	WF6.20X7.75	0.70	0.15	626; 686; 696	60/25; 693; 3/32; 1/BA; 3967; 4763A
AS7.30X8.80	0.12 0.15 0.18	WF7.20X8.70	0.90	0.15	607; 627; 687; 697	684
		WF7.20X12.00*	1.40	0.125	607; 627	63508; 7938; 1/88/083
AS8.30X9.80	0.15 0.18 0.20	WF8.20X9.70	0.85	0.18	608; 688; 698; 7938	623
AS9.30X10.80	0.15 0.18 0.20	WF9.20X10.70	1.15	0.18	609; 629; 689; 699	685; 694
AS10.30X11.80	0.18 0.20 0.22	WF10.20X11.70	1.05	0.20	6000; 6800; 6900; 3/8	604
		WF10.50X15.80*	1.70	0.20	6000	625; 634
AS11.30X12.80	0.18 0.20 0.22	WF11.20X12.70	1.30	0.20		624; 686; 695
AS12.30X13.80	0.20 0.22 0.25	WF12.20X13.70	1.30	0.22		687
AS 13.30 X 14.80	0.20 0.22 0.25	WF13.20X14.70	1.30	0.22		696
		WF13.20X18.80*	1.60	0.20		607; 626; 635; ¼
AS14.35X15.80	0.22 0.25 0.30	WF14.20X15.65	1.55	0.25		625; 634; 688; 1/4A
AS15.35X16.80	0.22 0.25 0.30	WF15.20X16.65	1.55	0.25		689; 697
		WF15.80X21.80*	1.60	0.20
AS 16.40 X 18.80	0.25 0.30 0.35	WF16.20X18.55	2.15	0.30		607; 626; 635; 6800; 698; ¼
		WF17.30X23.80*	1.50	0.25 0.30		609
		WF19.30X25.80*	1.90 1.80	0.35 0.30		6000; 629

* Subject to alterations

Please enquire about availability before using the shims and spring washers
Minimum quantity 1000 pieces

GRW ACCESSORIES - Shims & Spring Washers

GRW Bearing Accessories

Shaft retaining rings

Type	Dimensions (mm)
	Bore	Retaining Ring			Groove
	d1 Ø	d3 max.	b + 0.10	s + 0.02	d2 + 0.05	m + 0.03
WSR3	3	2.60	0.50	0.30	2.70	0.33
WSR4	4	3.60	0.50	0.30	3.70	0.33
WSR5	5	4.50	0.70	0.40	4.60	0.44
WSR6	6	5.45	0.70	0.40	5.60	0.44
WSR7	7	6.45	0.70	0.40	6.60	0.44
WSR8	8	7.35	0.90	0.50	7.50	0.55
WSR9	9	8.30	0.90	0.50	8.50	0.55
WSR10	10	9.25	0.90	0.50	9.50	0.55

ACCESSORIES

Bore retaining rings

Type	Dimensions (mm)
	Bore	Retaining Ring			Groove
	d1 Ø	d3 max.	b + 0.10	s + 0.02	d2 + 0.05	m + 0.03
BSR4	4	4.40	0.50	0.30	4.30	0.33
BSR5	5	5.45	0.50	0.30	5.30	0.33
BSR6	6	6.45	0.50	0.30	6.30	0.33
BSR7	7	7.50	0.50	0.30	7.30	0.33
BSR8	8	8.60	0.70	0.40	8.40	0.44
BSR9	9	9.60	0.70	0.40	9.40	0.44
BSR10	10	10.65	0.70	0.40	10.40	0.44
BSR11	11	11.65	0.70	0.40	11.40	0.44
BSR12	12	12.75	0.90	0.50	12.50	0.55
BSR13	13	13.75	0.90	0.50	13.50	0.55
BSR14	14	14.80	0.90	0.50	14.50	0.55
BSR15	15	15.80	0.90	0.50	15.50	0.55
BSR16	16	16.85	0.90	0.50	16.50	0.55
BSR17	17	17.85	0.90	0.50	17.50	0.55
BSR19	19	20.00	1.10	0.60	19.60	0.66

GRW SPECIAL BEARINGS

Thanks to its flexible manufacturing facilities GRW can provide a wide range of special ball bearings in addition to standard and high precision ball bearings made of chrome and stainless steel.

The special characteristics are:

Special shapes
Special lubricants
Special treatments

Furthermore they also manufacture rotationally symmetrical turned parts.

Special shapes

Superduplex bearings

Double-row deep groove radial bearing or angular contact ball bearing with divided inner or outer ring are called Superduplex bearings. The raceways are on the one-piece ring. This reliably prevents any radial displacement during installation and ensures optimum running characteristics. The divided rings (inner or outer rings) are paired in accordance with customer’s wishes. This ensures that GRW bearings have the desired axial preload.

Extraduplex bearings

Extraduplex bearings are double-row deep groove radial bearings or angular contact ball bearings with divided inner or outer ring. The ring is laser-welded under a defined preload. The advantages of this bearing variant are also evident during installation: any radial displacement or variation of the axial preload is reliably excluded.

Tandem duplex bearings

In a Tandem Duplex bearing, which is a double-row deep groove radial bearing, the raceways are accurately aligned to each other. These bearings are suitable for taking radial loads and axial loads on one side only.

Bearings with modified external design

At customer’s request, GRW manufactures single- or double-row bearings with spherical outer ring or groove in the outer ring. Optionally, bearings are available with overmolded synthetic or rubber, or with displaced pitched circle diameter (to optimize the stiffness of the bearings rings in their fit on the shaft or in the housing).

Bearings with integrated shaft

Bearing and shaft do not necessarily have to be considered separately. The GRW product range comprises bearings with integrated shaft. The raceway is ground on the shaft. The shaft is delivered fully mounted with ball set, retainer, and outer ring.

Bearings with housing

For these types, the raceway of the outer ring is ground in the housing.
Complex housings with flange and thread keep the tolerances during installation to a minimum.

SPINDLE/ANGULAR CONTACT BALL BEARINGS

Spindle ball bearings are angular contact ball bearings which, depending on the type, have a relieved land on the inner ring (AC2) or the outer ring (AC1). Axial forces can thus only be accepted in one direction. Spindle ball bearings can be used as single ball bearings or as ball bearing pairs in back to back, face to face or tandem arrangement.

GRW spindle ball bearings have the following characteristics:

Production in high precision quality (grade PS, P4, P2 or ABEC5, ABEC 7, ABEC9)
One part solid phenolic retainer (TA, TB, see ‘Retainers for Miniature Ball Bearings’) [NOTE – PUT A LINK TO THE RELEVANT PAGE]
Larger number of balls than a standard ball bearing
Contact angle 15o (other angles available upon request)
Available with steel balls or ceramic balls
The preload for ball bearing pairs is selected according to the applied load (light, medium or heavy preload)
Spindle ball bearings are generally lubricated with oil

These characteristics allow the ball bearings to run very accurately at high speeds. At the same time these ball bearings are very rigid and have minimum vibration levels:

The standard type is:
AC1 TA

Relieved on outer ring shoulder, ball bearing cannot be disassembled, solid phenolic retainer guided on outer ring.

Other types including ball bearings with removable inner rings are available upon request.

GRW DUPLEX BEARINGS

Duplex bearings are two matched bearings which, depending on the requirements, provide the following characteristics:

Accurate bearing positioning in radial and axial directions, which can vary from defined clearance to controlled rigidity
Limitation of the system’s yield
High load capacity compared to single bearings

The matching of the bearings is achieved by loading each single bearing with the desired preload and then grinding the inner or outer rings until the surfaces of both rings are flush with each other.

Two of the bearings treated in this manner are assembled according to the instructions on the package and loaded axially until the ground faces meet, this repeats the preload previously set in manufacture. Depending on the matching used either the inner rings or the outer rings or possibly both are preloaded against each other.

The ball bearings must be mounted according to the instructions on the packaging labels. If there are no special customer requirements, our ball bearings are paired with a preload of 5N and a nominal contact angle of 15^o. In principle this can, however, be altered to suit the operating conditions and requirements. The preload should not, however, be set higher than necessary as it will unnecessarily increase the torque. This has a direct influence on the life of the ball bearing.

The radial clearance should be set higher than usual for Duplex bearings so that the contact angle, the rigidity and the axial loading become greater.

In order to achieve optimum fits Duplex bearings are always calibrated into two groups on the bore and outside diameter and supplied packaged with the same code. They should also, if possible, be fitted with calibrated shafts and housings (see ‘Calibration of Bore and Outside Diameter’).

The ball bearing fits should therefore be selected carefully as an interference fit on the inner and outer ring would change the preload.

EXPLANATION OF BASIC TERMS

Closure

Protects the interior of the ball bearing against contamination and the components surrounding the ball bearing against escaping lubricant. The protection grade depends on the type of closure chosen and on the operating conditions. You will find more information on this in ‘Closures’.

Alignment

Mounting configuration where the axes of the two bearings are identical.

Retainer (Cage)

A ring with equally spaced ball pockets, which separates the balls from each other in the bearing raceway.

Combined Load

A force which is neither purely radial nor axial in nature, but simultaneously perpendicular and parallel to the axis.

Ball Pockets

The inner surfaces of a retainer which touch the ball surfaces.

Raceway Profile

The form of the raceway as seen in cross section.

Roundness

The roundness deviation is calculated by measuring the radius deviation using scanning equipment. You will find detailed information on this amongst other places in DIN ISO 4291 and DIN ISO 6318.

Curvature

The proportion of the radius of the raceway profile to the diameter of the ball.

Curvature [%] = 100 x radius of raceway profile
Ball diameter

Angular Contact Bearing, non-separable

(AC ball bearing) – Bearings with inner or outer ring lands relieved to facilitate snap-in assembly. This bearing, similar to a magneto bearing, can take axial loads in one direction only.

Angular Contact Bearing, separable

(L2T ball bearing) – Bearings with inner ring land relieved to facilitate removal of inner ring. The ball set is held in the outer ring by a special retainer. This bearing, similar to a magneto bearing, can take axial loads in one direction only.

Quality Grade

Term for the tolerances of a ball bearing. The individual tolerance values are defined in various standards such as DIN 620 T1, ISO 492, ISO 1224, AFBMA Std. 12 and 20. The definitions of the terms are defined among other places in DIN ISO 1132 and the measuring method in DIN 620 T1 and ISO TR 9274.

Full Complement Bearing

A bearing with a maximum number of balls. These bearings have no retainer. See ‘Retainer Types’ about the different types.

CLOSURES

Ball bearing closures fulfil two tasks at the same time: firstly they prevent contamination and secondly then contain lubricants.

Non-contact closures

Because of the proximity with the inner ring land the ball bearing closure forms an effective gap seal. It neither increases the torque nor influences the maximum speed compared with open ball bearings as the shields do not touch the inner ring. This is sufficient for most applications.

Metal shields
The shields are stamped from stainless steel on the majority of ball bearings. They are fastened to the outer ring with a circlip and can thus be removed. Ball bearings can also be fitted with pressed-in shields made from deep drawing steel sheet.

Rubber closures
The RZ closure is made of molded tuber with metal stiffener and can be used at temperatures from -30^oC to 120^oC. This closure is fastened in the outer ring by the rubber border.

Seal with inner ring contact

This ball bearing seal touches the inner ring land. This causes an increase in torque.

Teflon seal
The TS seal is made from glass-fibre reinforced Teflon which is fastened in the outer ring by a circlip.

Teflon seals can be used at working temperatures of -240oC to 300oC. They prevent contamination. However an hermetic sealing cannot be achieved. The torque is lower than for rubber seals due to the favourable low friction combination (PTFE/Steel) and the low contact force of the sealing lip.

TS seals are universally resistant to chemicals. The ball bearings are normally made from stainless steel, chrome steel can also be provided in appropriately large quantities.

Rubber seal
The RS seal is made of molded rubber with metal stiffener and can be used at temperatures of -30oC to 120oC.

The VS seal is made of molded Viton with metal stiffener and is suitable for temperatures of -20oC to 230oC.

Both seals are fastened in the outer ring by the rubber border.

We would like to remind you that certain lubricants cannot be used with rubber. Please contact us about difficult operating conditions.

Special closures

In addition to the standard closures GRW also manufacture special closures and combinations of different closers. Please contact us for further information.

CALIBRATION OF BORE & OUTSIDE DIAMETER

In order to achieve a uniform fit of the bearing on the shaft and in the housing it is necessary to limit the diameter tolerances of the bearings. As it is very difficult to control very small tolerances in series production, selective grading may be necessary. Only bearings in the quality grades P5 or ABEC5 or better can be graded into groups of 2.5µm (.0001 inch) or 1.25µm (.00005 inch). The diameter of the shaft and housings must also be graded to allow matching. Due to technical reasons, it is not possible to supply bearings in only one specific tolerance group. The following symbols are used for the classification of calibrated bearings: Table 15: Classification of calibrated ball bearings

Calibration	In groups of 2.5mm or .0001 inch	In groups of 1.25mm or .00005 inch
Bore d and outside diameter D	X	X4
Bore d only	XB	X4B
Outside diameter D only	XD	X4D

Example: 623 P5 GPR X4B Y X4B = bore calibrated in groups of 1.25µm. The outside diameter is not calibrated. Several tolerance groups result due to calibration. The relevant group is indicated on the packaging of the bearing, according to the following code:

Examples:

Code 21:
Bore -2.5/-5µm
O.D. 0/02.5µm

Code BC:
Bore -1.25/-2.5µm
O.D. -2.5/-3.75µm

Code A0:
Bore 0/-1.25µm
O.D. Not calibrated

Code 02:
Bore Not calibrated
O.D. -2.5/-5µm

Method of group classification:

Bore diameter: the smallest measured diameter determines the class

Outside diameter: the largest measured diameter determines the class

GRW Bearings LUBRICANTS

Selecting the right lubricant and lubricating method is just as decisive for the bearing function as selecting the bearing itself and designing the mating parts. The decision on a specific lubricant is made according to the operating conditions and the torque demands.

Lubricating oils

Lubricating oil is mainly used where minimum torque is required. GRW ball bearings, either open or with one closure, are preserved with oil ex works if no special lubrication is specified.

Lubricating greases

GRW ball bearings with closures on both sides and also our ball bearings with one closure together with a snap retainer are greased ex works if no special lubrication is specified. Regarding this we would mention that lubricating greases with EP additives are not suitable for low-noise ball bearings. The ball bearings can be lubricated with oils and greases other than those listed in the tables upon request and in quantities agreed upon. There are around 250 lubricants to choose from. Please contact us for specific details.

Special treatment

Special operating conditions go beyond the limits of application even for the special lubricants which are used. In such cases it is possible to specify suitable ball bearings by using different coatings. Galvanically applied precious metal layers, graphite, MoS2 etc. are used here. This treatment is used for ball bearings to work in vacuum systems up to ultra-high vacuums (UHV), in aviation and aerospace technology and at extreme temperatures. Hard coatings, for example, TiC, TiN or highest grade chromium are also applied for special applications. Please contact us for further information.

Table 3: Lubricating Oils

Code	Brand Name	Manu-facturer	Basic Oil	Operating Temperature Range	Viscosity at 40^oC/100^oC [mm²/s]	Specification
L001	Aero Shell Fluid 12	Shell	Ester	-40 to 100^oC	15/3.7	MIL-L-6085 C
L010	Isoflex PDP 38	Klüber	Ester	-65 to 100^oC	12/3.2	Following MIL-L-6085
L014	Krytox 143 AC	Du Pont	PFPE	-34 to 288^oC	200/30	–
L020	Shell Ensis L	Shell	Mineral	-10 to 100^oC	32/5.5	–
L085	Nyosil M 25	Nye	Chlorphenyl-silikon	-70 to 200^oC	56/20	–
L027	Synthetic Oil 200 A (Winsor Lube L 245 X)	Nye	Ester	-54 to 200^oC	13/3.4	MIL-L-6085 C
L065	Gargoyle Arctic SHC 224	Mobil Oil	Polyalphao-lefin	-45 to 140^oC	29/5.6	USDA-H1

Table 3: Lubricating Process

Code	Brand Name	Manu-facturer	Composition	Operating Temperature Range	Viscosity at 40^oC/ 100^oC [mm²/s]	Speed Factor	Specifi-cation
G305	ASG 7	Shell	Diester/ microgel	-73 to 149^oC	15/3.1	Not known	MIL-G-23827 B
G310	Asonic GLY 32	Klüber	Ester + polyalpha-olefin/ lithium	-50 to 140^oC	25/5	1.000.000	–
G315	Barrierta L 55/2	Klüber	PFPE/PTFE	-40 to 260^oC	400/38	300.000	–
G316	Nye Instrument Grease 704 B	Nye	Diester/ lithium	-65 to 150^oC	11.8/3.25	300.000	–
G331	Isoflex Super LDS 18	Klüber	Mineral oil + ester / lithium	-50 to 120^oC	15/3.7	1.000.000	–
G332	Isoflex Topas NB 52	Klüber	Polyalphao-lefin/barium complex	-50 to 150^oC	30/5.5	1.000.000	Following MIL-G-81322
G338	Krytox 240 AC	Du Pont	PFPE/PTFE	-34 to 288^oC	200/30	400.000	MIL-G-27617 Type III MIL-G-27616
G340	Longtime PD2	Optimol	Mineral oil/lithium	-35 to 140^oC	95/9.0	1.000.000	–
G366	Nyogel 781 D (versilube G300)	Nye	Ghlorophe-nylsilicon/ lithium	-70 to 200^oC	53/18.9	200.000	–
G462	Unisilkon L50/2	Klüber	Silicon/PTPE	-50 to 200^oC	112/27	200.000	–
G463	Mobilgrease FM 102	Mobil Oil	White oil/ aluminium complex	-20 to 120^oC	108/10.5	400.000	FDA 178.3570 USDA-H1

MATERIALS FOR RINGS & BALLS

GRW ball bearings are made from chrome steel (SAE 52100) or from stainless steel (X65Cr13). Ceramic balls can be used in both version if required (hybrid ball bearings). Hybrid ball bearings (steel rings and ceramic balls) are above all used in dental technology, in spindle bearings and vacuum technology. The chrome steel (1.3505/SAE 52100) used is very good heat treatable and maintains a high level of strength when hardened. Ball bearings made from this kind of steel have an excellent service life at working temperatures up to 170oC (338oF). The stainless steel (1.4037) is a martensitic steel which can be used at a working temperature of up to 200oC (392oF) without noticeable hardness loss. Improvements in steel production and heat treatment allow the load ratings of both steels to be the same. Table 1: Chemical analysis

Prefix	–	SS
DIN DIN SAE AFNOR	1O0Cr6 1.3505 52100 100Cr6	X65Cr13 1.4037
C % Si % Mn % P % S % Cr % Mo %	0.95 – 1.19 0.15 – 0.35 0.25 – 0.45 0.03 max. 0.025 max. 1.35 – 1.65 –	0.60 – 0.75 1 max. 1 max. 0.04 max. 0.03 max. 12 – 14 0.75 max.

We will be pleased to provide you with information on the chemical resistance of above mentioned materials.

RETAINERS/CAGE TYPES FOR MINIATURE BALL BEARINGS

Designs and materials used for the retainers are suitable to the task. Our two-piece ribbon retainer is sufficient in the majority of cases. The following table shows the different types:

GRW Retainer /Cage Code	Picture	Description/Material	Application Range/Purpose
E J Y		Two-piece ribbon retainer made of: – steel sheet (E) – stainless steel sheet (J) – brass sheet (Y)	For deep groove ball bearings. For stainless steel ball bearings; retainer from stainless steel sheet. This retainer can also be clinched loosely to reduce torque.
JH		One-piece stainless steel snap type retainer.	For deep groove ball bearings. Mainly used for small ball bearings at low and medium speeds.
TNH		One-piece moulded synthetic snap type retainer.	For deep groove ball bearings. Good running and torque characteristics for medium speed range. Working temperature -30^oC to 80^oC (short term 100^oC).
TN9H		One-piece glass-fibre reinforced moulded synthetic snap type retainer.	For deep groove ball bearings. Speed range high than TNH retainer. Working temperature -30^oC to 120^oC (short term 180^oC).
THA THB		Machined one-piece snap type retainer made from reinforced phenolic resin. A = outer ring guided B = inner ring guided	For high speed deep groove ball bearings. High rigidity and emergency running characteristics. Working temperature -50^oC to 140^oC. Can be vacuum impregnated with oil.
TXHA TXHB		Machined one-piece snap type retainer made from special materials. X stands for a number indicating the material. A = outer ring guided B = inner ring guided	For high speed deep groove ball bearings. High rigidity and emergency running characteristics. Working temperature -50^oC to 260^oC depending on material.
TA TB		Machined one-piece, solid retainer made from fabric reinforced phenolic resin. A = outer ring guided B = inner ring guided Only for AC types	For high speed angular contact/spindle ball bearings. High rigidity and emergency running characteristics. Working temperature -50^oC to 140^oC. Can be vacuum impregnated.
TXA TXB		Machined one-piece, solid retainer made from special material. X stands for a number indicating the material. A = outer ring guided B = inner ring guided Only for AC types	For high speed angular contact/spindle ball bearings. High rigidity and emergency running characteristics. Working temperature -50^oC to 260^oC. Can be vacuum impregnated.
VAC1 VAC2		Full complement ball bearing, without retainer, cannot be disassembled. VAC1 = one shoulder relieved on outer ring. VAC2 = one shoulder relieved on inner ring.	Used for medium speeds and high axial loads in one direction only.

NOTE Not all retainers are available for all bearing sizes. Please call for further information. Other ball bearings and retainer designs and also retainer materials for special requirements are available on request.

THREE TYPES OF DUPLEX ASSEMBLY FOR RADIAL BALL BEARINGS

Back to Back
O arrangement (DB)
(reference 1)

With the ‘back to back’ bearing pair the inner rings are claimed together. The contact angle lines between the outer ring raceway, ball and inner raceway diverge. This results in a maximum spread giving high rigidity. This is the reason why this type of duplex bearing is most commonly used.

Figure 21 – back to back

Face to Face
X arrangement (DF)
(reference 2)

With the ‘face to face’ bearing pair the outer rings are claimed together. The contact lines converge resulting in a smaller spread and more elastically.

Figure 22 – face to face

Tandem (DT)
(reference 3)

While duplex bearings mounted ‘back to back’ or ‘face to face’ are suitable to accommodate axial loading in both directions, a tandem mounted bearing pair is capable of accepting a very high axial load in one direction only. With this type of bearing pair, preloading and reduction of play can only be achieved, by preloading against another bearing or bearing pair.

Figure 23- tandem

FITTING

The fits of the ball bearing on the shaft and in the housing essentially determine the operational behaviour of miniature ball bearings. When selecting fitting tolerances, the following criteria should therefore be considered.

Rotation conditions

Rings with circumferential loading should have a tighter fit than rings with point loading.

Circumferential loading occurs in the case of rotating ring and stationery load or stationery ring and rotating load. Point loading occurs in the case of a stationery ring and stationery load or rating ring and rotating load.

Running accuracy

The same high standard of accuracy and surface quality expected of the bearing must be applied to shaft and housing.

Loading

High loads demand tighter fits.

Temperature

There may be temperature differences between the ball bearing and mating components while the ball bearing is in operation. The dimensional changes caused by differential expansion should be taken into consideration.

In the case of miniature bearings great important is placed on simple mounting and high running accuracy, hence only a close sliding or transition fit is usually possible. Furthermore it must be remembered that irregularities on the shaft or in the housing bore are transferred to the relatively thin-walled bearing rings. In order to improve the fit, it is possible to calibrate the bore and outside diameter into groups (see Calibration of bore & outside diameter section).

The values shown in tables 12 and 13 are only valid for materials with similar thermal expansion coefficients (11 . 10-6 . K-1).

If the expansion coefficient varies or if there are temperature variations between the outer ring and housing or between the outer ring and housing or between the inner ring and shaft, tolerances which ensure the appropriate fit at operating temperatures should be selected.

Shaft tolerances in µm
.0001”

Ball bearing bore

Grade ®

Tolerance in mm

Tolerance in .0001 inch ®

Operating Conditions

0/-8

0/-3

0/-5

0/-2

Calibration

Type

Fit

0/-2.5

0/-1

-2.5/-5

-1/-2

Low loading

Medium speed

No vibration

-5/-13

-2/-5

-5/-11

-2/-4

-5/-8

-2/-3

-8/-11

-3/-4

Sliding fit

Low to medium loading

Medium speed

Low vibration

0/-8

0/-3

0/-6

0/-2.5

0/-3

0/-1.2

-3/-6

-1.2/-2.5

Transition fit

Heavy loading

High speed

High frequency vibrations

+4/-4

+1.6/-1.6

+4/-2

+1.6/-1

+4/+1

+1.6/+0.4

+1/-2

+0.4/-1

Press fit

Table 12: Shaft tolerances

Housing tolerances in µm
.0001”

Ball bearing bore

Grade ®

Tolerance in mm

Tolerance in .0001 inch ®

Operating Conditions

0/-8

0/-3

0/-5

0/-2

Calibration

Type

Fit

0/-2.5

0/-1

-2.5/-5

-1/-2

Low loading

Medium speed

No vibration

+5/-3

+2/-1.2

+5/-1

+2/-0.4

+5/+2

+2/-1

+2/-1

+1/-0.4

Sliding fit

Low to medium loading

Medium speed

Low vibration

0/-8

0/-3

0/-6

0/-2.5

0/-3

0/-1.2

-3/-6

-1.2/-2.5

Transition fit

Heavy loading

High speed

High frequency vibrations

-4/-12

-1.6/-5

-3/-9

+1.2/-3.5

-3/-6

+1.2/-2.5

-6/-9

-2.5/-3.5

Press fit

Table 13: Housing tolerances

The information on this page applies to steel shafts and housings. The linear thermal expansion coefficient of other materials (e.g. aluminium housing) must be taken into consideration at operating temperatures other than ambient (20^oC).

HIGH PRECISION BALL BEARING HANDLING & FAILURE ANALYSIS

High-precision ball bearing handling

GRW ball bearings are manufactured with extreme care and then packaged in order to avoid contamination and corrosion. During mounting of the bearings, the following advice should be heeded:

Bearings should be stored in their original package in clean, dry rooms, under constant temperature conditions
Bearings should only be removed from their original packaging shortly after installation if possible using tweezers or finger stalls
Care should be taken that the place of assembly is clean and well lit and that all other parts are equally clean
The bearings should not be subjected to shock and assembly force should only be applied to the ring being fitted, never transferred through the balls
If glued connections are used care should be taken to ensure that excess glue does not enter the bearing
Re-lubrication should only be carried out with the identical lubricant with identical purity. We recommend having the bearings lubricated by the manufacturer.

Failure analysis

Special examinations are essential in order to establish the cause of failure or to estimate the life expectancy of ball bearings. We will be pleased to assist you in this matter.

Valuable information is obtained if bearings are disassembled and examined after a certain time of operation and not only after failure.

If you dismount bearings, mark the bearing rings so you can reproduce the original position.

Bearing MISALIGNMENT

The misalignment of a bearing is the degree to which both rings can be titled relatively to each other. The misalignment angle depends on the radial clearance and the internal geometry of the bearing.

Too much misalignment of the rings should always be avoided, as even a small angle of 2’ to 3’ increases the noise level noticeably. Attention must be paid to accurate alignment when designing bearing seats and adjacent surfaces.

Figure 25 shows the free misalignment (without load) depending on radial clearance, for the complete bearing range.

Example: The minimum and maximum possible free misalignment is to be calculated for the ball bearing SS608 C4/8 GPR J: The basic type 608 is assigned to graph 10 according to table 24. Vertical projection of the radial clearance limits 4 or 8mm gives 2 points of the corresponding graphs (10) which can be transferred to the left on the misalignment scale. Thus: The minimum possible free misalignment: βmin ≈ 13 minutes of angle The maximum possible free misalignment: βmax ≈ 18 minutes of angle

Basic Type	Graph	Basic Type	Graph	Basic Type	Graph
681	1	695	8	1016	1
691	2	605	5	1191	1
68/1.5	1	625	9	1397	1
69/1.5	3	635	10	5/64	3
682	3	686	5	2380	3
692	3	696	6	3/32	4
67/2.35	3	626	10	3175	4
68/2.35	3	687	6	1/8A	4
68/2.5	3	697	8	1/8B	6
69/2.5	4	607	10	3967	6
60/2.5	4	627	10	4763A	6
673	4	688A	8	4763B	5
683	4	688	8	3/16	5
693	4	698	8	6350A	7
623	6	608	10	6350B	5
674	5	689	8	1/4A	7
684	6	699	9	1/4	10
694	7	609	10	7938	8
604	7	629	10	3/8	9
624	6	6800	9
634	9	6900	9
675	6	6000	10
685	7

Table 24: Assignment of the graphs for calculating the misalignment

MOUNTING OF BEARINGS

Flanged ball bearings

There are many advantages in using miniature and instrument ball bearings which have a flange on the outer ring. Steeped housing bores, which make it impossible or very difficult to maintain accurate alignment of both bearing fits, are not necessary. There is also no need for the use of circlips, which create difficulties in small housing bores or thinned walled housings (see Figure 7).

Furthermore the assembly of flanged bearings is relatively narrow housings (i.e. gearboxes) has proved effective (see Figure 8).

If duplex bearings are used, the use of a flange bearing simplifies the design of the locating bearing. The axial position of the Duplex bearing pair can be determined precisely for this arrangement (see Figure 9).

Ball bearings with extended inner rings

Ball bearings with an extended inner can simplify the design of various assemblies. Shims, washers and other spacers are unnecessary. Stepped shafts are also redundant (see Figure 10).

Ball bearings with heavy outer rings

Ball bearings with their outer rings supported by fitting in a housing can take highest loads. To increase the load capacity of ball bearings which are not built into housing different types such as ‘special ball bearings with heavy outer rings’ were developed and are used as so-called rollers (see Figure 11).

SHAFT & HOUSING SHOULDERS

The assembly conditions are very important for ball bearings to function correctly. The shoulders for the inner and outer ring should allow the axial load to be transferred safely without allowing the rings to tilt against each other.

These examples apply analogously to the ball bearing housing

The values for the largest (d_a _max) and for the smallest (d_{a min}) permissible shoulder diameter for the shaft and the values for the largest permissible shoulder diameter for the housing (D_{a max}) are given in the dimension tables.

The following specifications should be taken into consideration:

The shoulder diameter of the housing must in any case be smaller than D_{a max}, the shoulder diameter of the shaft much not be smaller than d_{a min}.
The radius on the shaft and housing must not be larger than the corner radius r_{s min} of the ball bearing. An undercut if preferable here. The edge radii of the ball bearings are not suitable for locating the ball bearing in any way.
The axial runout of the mating surfaces should not be greater than the maximum axial runout of the ball bearing used. The performance of the ball bearing could otherwise be influenced.

GRW Bearing TOLERANCES

Precision ball bearings are manufactured to standards established by the Annular Bearing Engineers Committee (ABEC) of the American Bearing Manufacturers Association (ABMA). These standards have been accepted by the American National Standards Institute (ANSI) and conform essentially to the standards set by the International Standards Organization (ISO).

Inner ring tolerance table

Outer ring tolerance table

The ABEC and ISO bearing standards are primarily concerned with bearing tolerances. While tolerance is an important factor in the performance of a bearing, there are many other factors that also affect the suitability of a bearing to its application.

ABEC and ISO standards do not cover: radial play, raceway curvature, surface finish, material, ball complement, number, size or precision level, retainer type, lubrication, torque, cleanliness at assembly, packaging and other factors that may be essential to the desired bearing performance.

GRW BEARINGs CAPACITIES

Static bearing capacity

In rolling bearing technology, we talk about the static bearing capacity when the ball bearing is loaded while stationery or during slow swinging movements. The calculations are made according to DIN ISO 76.

Basic static radial load rating C_or

The basic static radial load rating is the static radial load which corresponds to a calculated contact stress of 4200 MPa at the centre of the most heavily loaded rolling element/raceway contact.

Static equivalent radial load _Por
The static equivalent radial load is the static radial load which would cause the same contact stress at the centre of the most heavily loaded rolling element/raceway contact that occurs under the actual load conditions.

Calculating the static equivalent radial load:

P_or = X_o . F_r + Y_o . F_a
X_o = 0.6
Y_o = 0.5
F_r = greatest radial load occurring (N)
F_a = greatest axial load occurring (N)

If the calculation gives a value, P_or < F_r, P_or = F_r should be set.

Permanent deformation

Permanent deformation on raceways and rolling elements even occurs when a stationery ball bearing is only loaded moderately.

Experience shows that a deformation of 0.0001 x rolling element diameter on the most highly loaded point of contact between raceway and rolling elements will not noticeably effect the function of the ball bearing.

Even greater deformation is justifiable if the ball bearing is running at low speed and the requirements for noise are not high. On the other hand only slight permanent deformation is allowed if the noise and friction requirements are particularly stringent.

Dynamic bearing capacity

The dynamic bearing capacity is the stress on a rotating ball bearing. The additional term ‘dymanic’ indicates the operating condition of the bearing not the effect of the load. The calculations are made according to DIN ISO 281.

Basic dynamic radial loading C_r

The basic dynamic radial load rating for radial ball bearings is that constant radial load which a sufficiently large number of apparently identical ball bearings could theoretically endure for a basic rating life of one million revolutions.

Dynamic equivalent radial load P_r

The dynamic equivalent radial load for radial ball bearings is that constant radial load under the influence of which a rolling bearing would have the same life as it will attain under the actual load conditions.

The DIN load ratings are given in the ball bearing tables. The actual load ratings can deviate depending on the ball bearing type. The load ratings are approximately 30% lower for hybrid ball bearings than for comparable steel ball bearings.

Please contact us for the exact load ratings.

ELASTIC BEHAVIOUR OF DEEP GROVE BALL BEARING

Two types of elastic yield should be distinguished with ball bearings: axial and radial yield.

Axial elastic yield

The axial elastic yield of a ball bearing is the distance which the inner ring moves axially compared with the outer ring when the axial clearance of the bearing has been removed, and the bearing is axially loaded. It does not increase linearly with the applied load as the contact areas between balls and raceways become larger with increasing load.

Radial elastic yield

The radial elastic yield is caused by a radial force component after radial play has been removed. Given similar conditions, with small contact angles the radial yield is considerably less than the axial yield. With increasing contact angle, the radial yield increases while the axial yield decreases, up to a contact angle of approx.. 35^o, when values become practically the same.

Both types of yield depend on the internal construction of the bearing, the radial clearance and applied load.

The relatively large amount of yield can be reduced by using preloaded bearing pairs (see ‘Duplex Bearings’). Preloading will result not only in a reduction of the elastic yield, resulting in increased rigidity, but also in a near to linear relationship between loading and yield for a considerably wide range of applied load. For instance, a ball bearing pair with 10N preload will maintain linearity up to approx. 30N external axial load.

To estimate this, the following formula can be used:

F_v = F_a / 3

F_v = axial preload [N]
F_a = axial bearing loading [N]

Please contact us for further information.

GRW Bearings FUNCTIONAL TESTS

Functional tests on the assembled bearing include noise or vibration and torque tests. The realization of these tests is necessary to ensure uniformity of the production run or to guarantee compliance with customer requirements. The basis for attaining this goal is constant monitoring of the parts for roundness and surface finish. The testing method should be selected according to the nature of the later use.

Noise test

The abbreviation GPR given in our numbering system stands for 100% noise tested ball bearings. We test the amplitude of the vibrations generated by the ball bearings at set speeds and frequencies.

Torque test

Torque tested ball bearings are tested and packaged in rooms with a controlled atmosphere in laminar cabinets. We recommend instrument oils with a viscosity of <14 mm²/s at 40^oC for low torque bearings. The starting torque is the torque required to start the rotation of one ring, with the other stationery. The torque is tested on a vertical shaft with axial loading. The measurements made with the tester according to MIL-STD-206A provide very exact and reliable values. During the test the outer ring is driven and the inner ring loaded with the standard load according to the bearing size. Due to the lack of a generally accepted standard torque comparisons of bearings of the same type can only be made in identical measuring conditions on the same measuring equipment. Table 4 gives reference values for the maximum starting torque of µNm. These values apply for instrument ball bearings without seals P5 or ABEC5 and better, which are lubricated with instrument oil with viscosity <14 mm²/s at 40^oC. The value can be 10 to 40 times greater for ball bearings with grease lubrication. In this test the axial loading of the inner ring is 75g for ball bearings with an outside diameter up to 10mm. Ball bearings with a greater outside diameter are loaded with 400g. The running torque is the torque which is required to keep a ball bearing in rotation. In this case together with the user we agree upon a suitable measuring method for the test. Table 4: Maximum starting torque in µNm

Basic Type	Torque mNm	Load g	Basic Type	Torque mNm	Load g	Basic Type	Torque mNm	Load g
681	15	75	695	69	400	1016	15	75
691	15	75	605	69	400	1191	15	75
68/1.5	15	75	625	69	400	1397	15	75
69/1.5	15	75	635	76	400	5/64	15	75
682	15	75	686	69	400	2380	15	75
692	15	75	696	69	400	3/32	15	75
67/2.35	15	75	626	76	400	3175	15	75
68/2.35	15	75	687	69	400	1/8A	15	75
68/2.5	15	75	697	76	400	1/8B	16	75
69/2.5	15	75	607	76	400	3967	15	75
60/2.5	16	75	627	80	400	4763A	15	75
673	16	75	688A	52	400	4763B	16	75
683	16	75	688	76	400	3/16	52	400
693	16	75	698	76	400	6350A	15	75
623	16	75	608	80	400	6350B	52	400
674	16	75	689	76	400	1/4A	60	400
684	16	75	699	80	400	1/4	70	400
694	65	400	609	80	400	7938	52	400
604	65	400	629	100	400	3/8	95	400
624	69	400	6800	80	400
634	69	400	6900	95	400
675	65	400	6000	100	400
685	65	400

We use µNm as a measuring unit. Please do not use the other measuring units given in the following table. They are only given for comparison.

Assembly of low torque bearings

For low torque bearings in particular, great care must be taken in the choice of fits and tolerances. Shaft and housing tolerances have to be selected so that a sliding fit results. Please refer to ‘Fitting’ and ‘Reduction of RadialClearance’ for information. Even small misalignment of the inner and outer ring can result in great torque of the bearing. Therefore particular attention must be paid to the alignment between shaft and housing bore, as well as, to the parallelism of the mating faces. Extreme cleanliness of the assembly area and parts is essential, in order to achieve a perfect low torque bearing. Even minute contamination causes torque peaks, which can be many times higher than the average torque level.

Table 5: Comparison of measuring units

	1 mNm =	1 cmp =	1 oz.in. =	1 cNcm =
mNm	1	100	7200	100
cmp	0.01	1	72	1
oz.in.	0.000139	0.0139	1	0.0139
cNcm	0.01	1	72	1

FATIGUE LIFE

The fatigue life (basic rating life) is the number of revolutions (or number of hours at constant speed) which 90% of a sufficiently large quantity of apparently identical ball bearings will complete or exceed before the first evidence of fatigue develops. The calculations are made according to DIN ISO 281.

Basic rating life in hours is calculated as follows:

L_h =	10⁶ . (C_r)³
	60 . n (P_r)

L_n = basic rating life [h]
n = speed of inner ring [rpm]
C_r = basic dynamic radial load [N]
P_r = dynamic equivalent radial load [N]

Calculation of the dynamic equivalent radial load P_r:

P_r = X . F_r+ Y . F_a

P_r  = dynamic equivalent radial load [N]
F_r  = radial load of bearing [N]
F_a = axial load of bearing [N]
X   = dynamic radial load factor
Y   = dynamic axial load factor

The influence of load on the life is only to be taken into consideration in the above life equation. If the ball bearings listed are used for conventional bearing purposes, this life calculation will be sufficient.

As the life calculation only takes material fatigue as a cause of failure the calculated life will only correspond with the actual life of the ball bearing if the following requirements are fulfilled:

Sufficient lubrication is guaranteed during the whole running time.
The loads and speeds used in the calculation correspond with the actual operating conditions.
Contamination of ball bearings and lubricant is avoided.

GRW Bearings LIMITING SPEEDS

The maximum speed for a ball bearing in operation is limited by various mechanical and kinematic criteria. Narrow tolerances of bearings and surrounding parts, special measures regarding lubrication and type of lubricant as well as special retainer materials and designs generally have a beneficial effect on the speed limit. The characteristical values for speed given in the tables only apply to specially set reference conditions. They therefore only give an indication of the relative speed suitability of the ball bearing. Please call us for more information if operating conditions are different.

The kinematically permissible speed n_zul

The ‘kinematically permissible speed n_zul’ applies to ball bearings with contact seals which do not have a thermal reference speed n_ur defined in the standard. It takes into consideration the special conditions resulting from the wiping contact between ball bearing inner ring and seals. In principle the same conditions as for the thermal reference speed n_ur otherwise apply.

The thermal reference speed n_ur

The reference conditions have been selected in DIN 732-1 so that the ‘thermal reference speed n_ur’ is identical for both types of lubrication: oil or grease. The essential operating conditions are:

Reference temperature of the ball bearing on stationery outer ring 70^oC
Reference temperature of the ball bearing environment 20^oC
Reference loading P, of the ball bearing 5% of the static radial loading rating C_or
Oil lubrication as oil bath lubrication with a conventional mineral oil without EP additives, with a kinematic viscosity of 12 mm²/s at 70^oC
Grease lubrication with a standard lithium soap grease with a mineral base oil without EP additives. The kinematic viscosity of the base oil is 22 mm²/s at 70^oC. The grease quantity is approx. 30% of the free space in the ball bearing
Ball bearings with standard designs, i.e. with standard accuracy, with standard radial play, with non-contact closures
Ball bearing installed on a horizontal shaft with a stationery outer ring and installation dimensions and tolerances which do not reduce bearing radial clearance

The permissible thermal operating speed n_u

The speed at which the average ball bearing temperature reaches the permissible value in real operating conditions is called the ‘permissible thermal operating speed n_u’. It is calculated from the thermal reference speed by multiplying it with the factor ‘speed ration f_n’ according to DIN 732-2: n_u = f_n . n_ur

Following the standard we use diagrams which make calculating this factor far easier. The different torque effects of oil and grease lubrication are taken into consideration.

Click on image to enlarge

Figure 6: Calculation of the permissible thermal operating speed nu

REDUCTION IN RADIAL CLEARANCE

Reduction in radial clearance due to heat

The ball bearing radial clearance relates to an ambient temperature of 20^oC and excludes external loads with exception of the measuring load. Frictional heat to be dissipated or a temperature difference between rotor and stator have the effect of a temperature difference between the inner and outer ring. The differential expansion between inner ring and outer ring may lead to a reduction in radial clearance which should be taken into consideration in the set-up of the ball bearing: RV = Δ_da – Δ_di

RV =		Radial clearance reduction (µm)
Δ_da=		Diameter change on outer ring between the temperature t and the ambient temperature of 20^oC (µm)
Δ_di=		Diameter change on inner ring between the temperature t and the ambient temperature of 20^oC (µm)

The diameter change caused by the temperature difference is calculated For the outer ring: Δ_da–d_0a.α.Δ_t and For the inner ring: Δdi–d0i.α.Δ_t

d_0a=		Raceway diameter on outer ring at 20oC (µm)
d_0i=		Raceway diameter on inner ring at 20oC (µm)
α =		Length expansion coefficient [K^-1], For 100Cr6 … 11.0 . 10^-6 K^-1 For X65Cr13 … 10.5 . 10^-6 K^-1
Δ =		Temperature difference between the temperature t and the ambient temperature 20^oC (K)

Example: Bearing SS6000 GPR j (d – 1mm, D – 26mm, D_w = 4,763mm) reaches an inner ring temperature of 60^oC and an outer ring temperature of 30^oC during operation. The following raceway diameters are set due to heat expansion. Outer ring:

d_0a ≈		(d+D)/2 + D_w ≈ (10+26)mm/2 + 4,763mm ≈ 22,763mm
Δ_da =		d_0a . α . Δ_t
Δ_da =		(22,763 . 10³) µm . 10.5 x 10^-6 K^-1 . 10 K = 2.4µm

Inner ring:

d_0i ≈		(d+D)/2 + D_w ≈ (10+26)mm/2 + 4,763mm ≈ 13,237mm
Δ_di =		d_0i . α . Δ_t
Δ_di =		(13,237 . 10³) µm . 10.5 x 10^-6 K^-1 . 40 K = 5.6µm

Reduction in radial clearance:

RV = Δ_da – Δ_di RV = 2.4µm – 5.6µm = 3.2µm This gives a radial clearance reduction of 3.2µm. Our rough estimation does not take into consideration the influence of the balls which would only effect the result slightly. If the result is positive, an increase in radial clearance should be considered.

Reduction in radial clearance due to irference fit

When selecting the fitting tolerances, you should note that an interference fit causes a reduction in radial clearance. This depends on the effective interference kit and also on the ring thickness ratio and may be calculated very simply. RV = k . Ü

RV=		Radial clearance reduction (µm)
Ü=		Largest fitting sizes (µm)
k=		Factor from table 14 whereby it is presumed that the inner ring is pressed onto a compete shaft or the outer ring is pressed into a stable, practically non-deformable housing

If there is an interference fit on both the shaft and housing, both values should be added to give the complete radial clearance reduction. Example: Ball bearing 623 P5 GPR Y is fitted on the shaft with a press fit and with a transition fit in the housing. This results in the following interference kit:

Bore		+0 / -5µm } = 9µm
Shaft		+4 / -2µm }
Outer diameter		+0 / -5µm } = 6µm
Housing diameter		+0 / -2µm }

Taking the relevant k value for 623 from table 14 the following radial clearance reduction is achieved: For the inner ring: RV=k.Ü–0.5.9µm=4.5µm and For the outer ring: RV=k.Ü–0.8.6µm=4.8µm Thus a total maximum radial clearance reduction of 9.3µm results. This must be taken into consideration when selectin the radial clearance of a bearing.

Table 14: k-factor for inner ring (IR) and outer ring (OR)

Basic Type	IR	OR	Basic Type	IR	OR	Basic Type	IR	OR
681	0.6	0.8	695	0.6	0.8	1016	0.6	0.8
691	0.5	0.8	605	0.6	0.8	1191	0.6	0.8
68/1.5	0.6	0.8	625	0.6	0.8	1397	0.6	0.8
69/1.5	0.5	0.8	635	0.5	0.8	5/64	0.6	0.7
682	0.7	0.8	686	0.7	0.8	2380	0.8	0.9
692	0.6	0.8	696	0.7	0.8	3/32	0.5	0.9
67/2.35	0.8	0.8	626	0.6	0.8	3175	0.8	0.9
68/2.35	0.8	0.9	687	0.8	0.8	1/8A	0.7	0.9
68/2.5	0.7	0.8	697	0.7	0.8	1/8B	0.6	0.8
69/2.5	0.6	0.8	607	0.7	0.8	3967	0.7	0.9
60/2.5	0.6	0.7	627	0.6	0.8	4763A	0.9	0.9
673	0.8	0.9	688A	0.9	0.8	4763B	0.8	0.9
683	0.7	0.8	688	0.8	0.9	3/16	0.6	0.8
693	0.7	0.9	698	0.7	0.8	6350A	0.9	0.9
623	0.5	0.8	608	0.7	0.8	6350B	0.8	0.9
674	0.8	0.9	689	0.8	0.9	1/4A	0.7	0.8
684	0.8	0.8	699	0.7	0.8	1/4	0.6	0.8
694	0.7	0.7	609	0.6	0.8	7938	0.8	0.9
604	0.6	0.8	629	0.6	0.8	3/8	0.7	0.8
624	0.6	0.8	6800	0.8	0.9
634	0.5	0.8	6900	0.7	0.8
675	0.9	0.9	6000	0.7	0.8
685	0.8	0.8

RELATIONSHIP BETWEEN RADIAL CLEARANCE, AXIAL CLEARANCE & CONTACT ANGLE

Radial Clearance

Radial clearance is a measured value of total movement of one ring relative to the other in a plane perpendicular to the bearing axis. Although radial clearance has no effect on the quality of the bearing, it has a significant effect on its performance.

Basically the selection of radial clearance depends on the fit of the bearing on the shaft and in the housing (see ‘Reduction in radial clearance’). Greater radial clearance than standard should be specified if the bearing is running under axial load conditions, operates at high speed, or when low torque is required.

Less than normal radial clearance should be specified if only radial load is applied or minimum noise is required. Small radial clearance is often recommended in order to reduce the axial clearance of an instrument. However, where low axial clearance is required, we advise to use matched bearings (see ‘Duplex Bearings’).

Axial Clearance

The axial clearance is the measured value in which one bearing ring can move axially in relation to the other. In bearings of the same type, axial clearance depends on the radial clearance.

Contact Angle

The contact angle is formed between the connecting line of the contact points ball/raceways and a plane perpendicular to the axis. It is formed when the axial clearance is removed by the opposite axial movement of the bearing rings. The contact angle is influenced by radial clearance, curvature and axial load of the bearing.

The average values for the axial clearance ad the contact angle in relation to the radial clearance and curvature of the ball bearing, can be taken from figure 20.

Table 19 lists the bearing basic types and graphs to be used.

Basic Type	Graph	Graph	Basic Type	Graph	Graph	Basic Type	Graph	Graph
681	1	A	695	6	B	1016	2	A
691	3	A	605	7	B	1191	3	A
68/1.5	3	A	625	9	C	1397	4	A
69/1.5	3	A	635	10	C	5/64	4	A
682	3	A	686	7	B	2380	3	A
692	4	A	696	7	B	3/32	6	A
67/2.35	5	B	626	10	C	3175	4	A
68/2.35	4	A	687	7	B	1/8A	6	A
68/2.5	4	A	697	9	B	1/8B	6	A
69/2.5	5	A	607	10	C	3967	4	A
60/2.5	5	A	627	11	C	4763A	4	A
673	10	C	688A	5	A	4763B	4	A
683	5	A	688	9	B	3/16	8	A
693	6	B	698	9	B	6350A	4	A
623	6	B	608	11	C	6350B	7	A
674	4	A	689	9	B	1/4A	9	A
684	6	B	699	9	B	1/4	10	B
694	6	B	609	11	C	7938	5	A
604	6	B	629	12	C	3/8	10	B
624	8	B	6800	9	B
634	9	C	6900	10	C
675	4	A	6000	12	C
685	6	B

Table 19: Assignment of graphs for Figure 20

Example:
Ball bearing 623, radial clearance 0.015mm
From table 19: graph 6, graph B
From figure 20: contact angle 17^o30’, axial clearance 0.097mm

DEEP GROOVE OPEN BALL BEARINGS

Bore Ø (d)	Outer Ø (D)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	Open Part No	Shield Width (B1)	Load Rating Cr(N)	Load Rating Cor(N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
1	3	1		0.05	681		82	22	140	7	0.5
1	4	1.6		0.1	691		160	43	126	6	0.794
1.5	4	1.2	0.4	0.05	68/1.5	2	163	44	113	6	0.794
1.5	5	2	0.6	0.15	69/1.5		192	59	93	7	0.794
2	5	1.5	0.5	0.08	682	2.3	192	59	90	7	0.794
2	6	2.3	0.6	0.15	692	3.1	286	90	91	7	1
2.35 ⁽⁷⁾	5	1.5		0.08	67/2.35		192	59	93	7	0.794
2.35 ⁽⁷⁾	5.5			0.08	68/2.35		286	90	91	7	1
2.5	6	1.8	0.5	0.08	68/2.5	2.6	289	92	81	7	1
2.5	7	2.5	0.7	0.15	69/2.5	3.3	432	149	71	8	1.191
2.5	8	2.8		0.15	60/2.5	3.6	432	149	81	8	1.191
3	6	2	0.6	0.08	673		195	60	81	8	1
3	7	2	0.5	0.1	683	2.8	432	149	71	8	1.191
3	8	3	0.7	0.15	693	3.8	644	215	67	7	1.588
3	10	4	1	0.15	623	4.8	725	265	62	8	1.588
4	7	2	0.6	0.08	674		345	130	63	9	1
4	9	3.3	0.6	0.1	684	3.3	658	226	62	7	1.588
4	11	4	1	0.15	694	4.8	730	271	66	8	1.588
4	12	4	1	0.15	604	4.8	734	282	56	8	1.588
4	13	5	1	0.2	624	5.8	1.339	488	52	7	2.381
4	16	5	1	0.3	634	5.8	1.646	663	39	8	2.5
4	16	5	1	0.3	634D		1.935	677	44	6	3.175
5	8	2	0.6	0.08	675		390	160	52	11	1
5	11	3	0.8	0.15	685	3.8	734	282	52	8	1.588
5	13	4	1	0.2	695	4.8	851	366	49	10	1.588
5	14	5	1	0.2	605	5.8	1.096	437	50	8	1.984
5	16	5	1	0.3	625	5.8	1.646	663	40	8	2.5
5	16	5	1	0.3	625D		1.935	677	45	6	3.175
5	19	6	1.5	0.3	635	6.8	2.522	1.057	33	8	3.175
6	10	2.5		0.15	676 ⁽⁸⁾		503	215	46	10	1.191
6	13	3.5	1	0.15	686	4.3	1.096	437	44	8	1.984
6	15	5	1.2	0.2	696	5.8	1.186	505	46	9	1.984
6	16	5		0.3	625/0002		1.646	663	41	8	2.5
6	19	6	1.5	0.3	626	6.8	2.522	1.057	34	8	3.175
7	11	2.5		0.15	677 ⁽⁸⁾		462	199	40	9	1.191
7	14	3.5	1	0.15	687	4.3	1.186	505	41	9	1.984
7	17	5	1.2	0.3	697	5.8	1.795	776	39	9	2.5
7	19	6	1.5	0.3	607	6.8	2.522	1.057	38	8	3.175
7	22	7	1.5	0.3	627		3.369	1.363	35	7	3.969
8	12	2.5		0.15	678 ⁽⁸⁾		551	270	35	12	1.191
8	16	4	1	0.2	688	4.8	1.795	776	38	9	2.5
8	19	6	1.5	0.3	698	6.8	1.798	797	40	9	2.5
8	22	6		0.3	608/003		3.369	1.363	34	7	3.969
8	22	7	1.5	0.3	608		3.369	1.363	38	7	3.969
9	14	3		0.15	679		536	276	33	12	1.191
9	17	4	1	0.2	689	4.8	1.798	797	34	9	2.5
9	20	6		0.3	699		1.922	915	35	10	2.5
9	24	7		0.3	609		3.435	1.43	33	7	3.969
9	24	7		0.3	609D		3.758	1.632	32	8	3.969
9	26	8		0.3	629		4.698	1.982	29	7	4.763
10	15	3		0.15	6700 ⁽⁸⁾		881	435	30	11	1.588
10	19	5	1	0.3	6800	5.8	1.922	915	34	10	2.5
10	22	6		0.3	6900		2.555	1.129	31	8	3.175
10	26	8		0.3	6000		4.698	1.982	32	7	4.763
10	30	9		0.6	6200		6.1	2.6	29	7	5.556
10	30	9		0.6	6200D		5.236	2.374	27	8	4.763
12	21	5		0.3	6801		1.93	900	30	12	2.381
12	24	6		0.3	6901		2.971	1.452	34	10	3.175
12	28	8		0.3	6001		5.237	2.359	31	9	3.969
12	32	10		0.6	6201		7.073	3.1	26	7	6
15	24	5		0.3	6802		2.08	1.1	24	14	2.381
15	28	7		0.3	6902		4.445	2.268	32	11	3.175
15	32	9		0.3	6002		5.676	2.819	26	9	4.763
15	35	11		0.6	6202		7.939	3.744	23	8	6
17	26	5		0.3	6803		2.24	1.27	22	16	2.381
17	30	7		0.3	6903		4.723	2.547	30	11	3.969
17	35	10		0.3	6003		6.172	3.267	23	10	4.763
17	40	12		0.6	6203		9.811	4.734	20	8	6.747

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE OPEN BALL BEARINGS

Inch Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	Open Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
0.0400	0.125	0.17098	0.0469	0.01299	0.003	1016		51	11	148	5	0.025
0.0469	0.1562	0.203	0.0625	0.013	0.003	1191	0.0937	163	44	129	6	0.0313
0.0550	0.1875	0.234	0.0781	0.023	0.003	1397	0.1094	239	67	114	6	0.0394
0.0781	0.25	0.296	0.0937	0.023	0.003	5/64	0.125	286	90	95	7	0.0394
0.0937	0.1875	0.234	0.0625	0.018	0.003	2380	0.0937	192	59	94	7	0.0313
0.0937	0.3125	0.359	0.1094	0.023	0.005	3/32	0.1406	644	215	62	7	0.0625
0.1250	0.25	0.296	0.0937	0.023	0.003	3175	0.125	292	97	80	7	0.0394
0.1250	0.3125	0.359	0.1094	0.023	0.003	1/8A	0.1406	644	215	65	7	0.0625
0.1250	0.375	0.44	0.1562	0.03	0.012	1/8B	0.1875	720	260	61	8	0.0625
0.1250	0.5		0.1719		0.012	1/8B/083		720	260	74	8	0.0625
0.1562	0.3125	0.359	0.1094	0.023	0.003	3967	0.1406	391	165	62	11	0.0394
0.1562	0.5		0.1094		0.003	3967/8	0.1406	391	165	69	11	0.0394
0.1875	0.3125	0.359	0.1094	0.023	0.003	4763A	0.1406	391	165	65	11	0.0394
0.1875	0.375	0.422	0.125	0.023	0.003	4763B	0.1562	730	271	56	8	0.0625
0.1875	0.5		0.1094		0.003	4763A/8	0.1406	391	162	70	11	0.0394
0.1875	0.5		0.1562		0.012	3/16		1.339	488	50	7	0.0938
0.2500	0.375	0.422	0.125	0.023	0.003	6350A	0.1562	391	165	54	11	0.0394
0.2500	0.5	0.547	0.125	0.023	0.005	6350B	0.1562	730	271	38	8	0.0781
0.2500	0.625	0.69	0.196	0.042	0.012	1/4A	0.2272	1.651	670	43	8	0.0984
0.2500	0.75		0.2188		0.016	1/4		2.522	1.057	35	8	0.125
0.3125	0.5	0.547	0.1562	0.031	0.005	7938	0.1875	539	279	45	12	0.0469
0.3750	0.875		0.2188		0.016	3/8		2.555	1.129	30	8	0.125

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE FLANGE EXTENDED INNER RING BALL BEARINGS

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	Flange Open Part No	Load Rating Cr(N)	Load Rating Cor(N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Complement Qty.: Z (5)	Ball Complement Size: Dw
1.5	4	5	1.2	0.4	0.05	F68/1.5	163	44	113	6	0.794
1.5	5	6.5	2	0.6	0.15	F69/1.5	192	59	93	7	0.794
2	5	6.1	1.5	0.5	0.08	F682	192	59	90	7	0.794
2	6	7.5	2.3	0.6	0.15	F692	286	90	91	7	1
2.5	6	7.1	1.8	0.5	0.08	F68/2.5	289	92	81	7	1
2.5	7	8.5	2.5	0.7	0.15	F69/2.5	432	149	71	8	1.191
3	6	7.2	2	0.6	0.08	F673	195	60	81	8	1
3	7	8.1	2	0.5	0.1	F683	432	149	71	8	1.191
3	8	9.5	3	0.7	0.15	F693	644	215	67	7	1.588
3	10	11.5	4	1	0.15	F623	725	265	62	8	1.588
4	7	8.2	2	0.6	0.08	F674	345	130	63	9	1
4	9	10.3	3.3	0.6	0.1	F684	658	226	62	7	1.588
4	11	12.5	4	1	0.15	F694	730	271	66	8	1.588
4	12	13.5	4	1	0.15	F604	734	282	56	8	1.588
4	13	15	5	1	0.2	F624	1.339	488	52	7	2.381
4	16	18	5	1	0.3	F634	1.646	663	39	8	2.5
5	8	9.2	2	0.6	0.08	F675	390	160	52	11	1
5	11	12.5	3	0.8	0.15	F685	734	282	52	8	1.588
5	13	15	4	1	0.2	F695	851	366	49	10	1.588
5	14	16	5	1	0.2	F605	1.096	437	50	8	1.984
5	16	18	5	1	0.3	F625	1.646	663	40	8	2.5
5	19	22	6	1.5	0.3	F635	2.522	1.057	33	8	3.175
6	13	15	3.5	1	0.15	F686	1.096	437	44	8	1.984
6	15	17	5	1.2	0.2	F696	1.186	505	46	9	1.984
6	19	22	6	1.5	0.3	F626	2.522	1.057	34	8	3.175
7	14	16	3.5	1	0.15	F687	1.186	505	41	9	1.984
7	17	19	5	1.2	0.3	F697	1.795	776	39	9	2.5
7	19	22	6	1.5	0.3	F607	2.522	1.057	38	8	3.175
7	22	25	7	1.5	0.3	F627	3.369	1.363	35	7	3.969
8	16	18	4	1	0.2	F688	1.795	776	38	9	2.5
8	19	22	6	1.5	0.3	F698	1.798	797	40	9	2.5
8	22	25	7	1.5	0.3	F608	3.369	1.363	38	7	3.969
9	17	19	4	1	0.2	F689	1.798	797	34	9	2.5
10	19	21	5	1	0.3	F6800	1.922	915	34	10	2.5

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE FLANGE EXTENDED INNER RING BALL BEARINGS

Inch Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	Flange Open Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
0.0400	0.125	0.17098	0.0469	0.01299	0.003	F1016		51	11	148	5	0.025
0.0469	0.1562	0.203	0.0625	0.013	0.003	F1191	0.0937	163	44	129	6	0.0313
0.0550	0.1875	0.234	0.0781	0.023	0.003	F1397	0.1094	239	67	114	6	0.0394
0.0781	0.25	0.296	0.0937	0.023	0.003	F5/64	0.125	286	90	95	7	0.0394
0.0937	0.1875	0.234	0.0625	0.018	0.003	F2380	0.0937	192	59	94	7	0.0313
0.0937	0.3125	0.359	0.1094	0.023	0.005	F3/32	0.1406	644	215	62	7	0.0625
0.1250	0.25	0.296	0.0937	0.023	0.003	F3175	0.125	292	97	80	7	0.0394
0.1250	0.3125	0.359	0.1094	0.023	0.003	F1/8A	0.1406	644	215	65	7	0.0625
0.1250	0.375	0.44	0.1562	0.03	0.012	F1/8B	0.1875	720	260	61	8	0.0625
0.1562	0.3125	0.359	0.1094	0.023	0.003	F3967	0.1406	391	165	62	11	0.0394
0.1875	0.3125	0.359	0.1094	0.023	0.003	F4763A	0.1406	391	165	65	11	0.0394
0.1875	0.375	0.422	0.125	0.023	0.003	F4763B	0.1562	730	271	56	8	0.0625
0.2500	0.375	0.422	0.125	0.023	0.003	F6350A	0.1562	391	165	54	11	0.0394
0.2500	0.5	0.547	0.125	0.023	0.005	F6350B	0.1562	730	271	38	8	0.0781
0.2500	0.625	0.69	0.196	0.042	0.012	F1/4A	0.2272	1.651	670	43	8	0.0984
0.3125	0.5	0.547	0.1562	0.031	0.005	F7938	0.1875	539	279	45	12	0.0469

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE OPEN EXTENDED INNER RING BALL BEARINGS

Metric Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	Open Ext Inner Ring Part No	Shield Width (B1)	Load Rating Cr(N)	Load Rating Cor(N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
1.5	4	5	1.2	0.4	0.05	E68/1.5	2	163	44	113	6	0.794
2	5	6.1	1.5	0.5	0.08	E682	2.3	192	59	90	7	0.794
2	6	7.5	2.3	0.6	0.15	E692	3.1	286	90	91	7	1
2.5	6	7.1	1.8	0.5	0.08	E68/2.5	2.6	289	92	81	7	1
2.5	7	8.5	2.5	0.7	0.15	E69/2.5	3.3	432	149	71	8	1.191
2.5	8		2.8		0.15	E60/2.5	3.6	432	149	81	8	1.191
3	7	8.1	2	0.5	0.1	E683	2.8	432	149	71	8	1.191
3	8	9.5	3	0.7	0.15	E693	3.8	644	215	67	7	1.588
3	10	11.5	4	1	0.15	E623	4.8	725	265	62	8	1.588
4	9	10.3	3.3	0.6	0.1	E684	3.3	658	226	62	7	1.588
4	11	12.5	4	1	0.15	E694	4.8	730	271	66	8	1.588
4	12	13.5	4	1	0.15	E604	4.8	734	282	56	8	1.588
4	13	15	5	1	0.2	E624	5.8	1.339	488	52	7	2.381
4	16	18	5	1	0.3	E634	5.8	1.646	663	39	8	2.5
5	11	12.5	3	0.8	0.15	E685	3.8	734	282	52	8	1.588
5	13	15	4	1	0.2	E695	4.8	851	366	49	10	1.588
5	14	16	5	1	0.2	E605	5.8	1.096	437	50	8	1.984
5	16	18	5	1	0.3	E625	5.8	1.646	663	40	8	2.5
5	19	22	6	1.5	0.3	E635	6.8	2.522	1.057	33	8	3.175
6	13	15	3.5	1	0.15	E686	4.3	1.096	437	44	8	1.984
6	15	17	5	1.2	0.2	E696	5.8	1.186	505	46	9	1.984
6	19	22	6	1.5	0.3	E626	6.8	2.522	1.057	34	8	3.175
7	14	16	3.5	1	0.15	E687	4.3	1.186	505	41	9	1.984
7	17	19	5	1.2	0.3	E697	5.8	1.795	776	39	9	2.5
7	19	22	6	1.5	0.3	E607	6.8	2.522	1.057	38	8	3.175
8	16	18	4	1	0.2	E688	4.8	1.795	776	38	9	2.5
8	19	22	6	1.5	0.3	E698	6.8	1.798	797	40	9	2.5
8	22	25	7	1.5	0.3	E608		3.369	1.363	38	7	3.969
9	17	19	4	1	0.2	E689	4.8	1.798	797	34	9	2.5
10	19	21	5	1	0.3	E6800	5.8	1.922	915	34	10	2.5

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE OPEN EXTENDED INNER RING BALL BEARINGS

Inch Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	Ext Inner Ring Open Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
0.0469	0.1562	0.203	0.0625	0.013	0.003	E1191	0.0937	163	44	129	6	0.0313
0.0550	0.1875	0.234	0.0781	0.023	0.003	E1397	0.1094	239	67	114	6	0.0394
0.0781	0.25	0.296	0.0937	0.023	0.003	E5/64	0.125	286	90	95	7	0.0394
0.0937	0.1875	0.234	0.0625	0.018	0.003	E2380	0.0937	192	59	94	7	0.0313
0.0937	0.3125	0.359	0.1094	0.023	0.005	E3/32	0.1406	644	215	62	7	0.0625
0.1250	0.25	0.296	0.0937	0.023	0.003	E3175	0.125	292	97	80	7	0.0394
0.1250	0.3125	0.359	0.1094	0.023	0.003	E1/8A	0.1406	644	215	65	7	0.0625
0.1250	0.375	0.44	0.1562	0.03	0.012	E1/8B	0.1875	720	260	61	8	0.0625
0.1562	0.3125	0.359	0.1094	0.023	0.003	E3967	0.1406	391	165	62	11	0.0394
0.1562	0.5		0.1094		0.003	E3967/8	0.1406	391	165	69	11	0.0394
0.1875	0.3125	0.359	0.1094	0.023	0.003	E4763A	0.1406	391	165	65	11	0.0394
0.1875	0.375	0.422	0.125	0.023	0.003	E4763B	0.1562	730	271	56	8	0.0625
0.1875	0.5		0.1094		0.003	E4763A/8	0.1406	391	162	70	11	0.0394
0.2500	0.375	0.422	0.125	0.023	0.003	E6350A	0.1562	391	165	54	11	0.0394
0.2500	0.5	0.547	0.125	0.023	0.005	E6350B	0.1562	730	271	38	8	0.0781
0.2500	0.625	0.69	0.196	0.042	0.012	E1/4A	0.2272	1.651	670	43	8	0.0984
0.3125	0.5	0.547	0.1562	0.031	0.005	E7938	0.1875	539	279	45	12	0.0469

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE FLANGE EXTENDED INNER RING BALL BEARINGS

Metric Series

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE FLANGE EXTENDED INNER RING BALL BEARINGS

Inch Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	Flange Ext Inner Ring Open Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
0.0469	0.1562	0.203	0.0625	0.013	0.003	FE1191	0.0937	163	44	129	6	0.0313
0.0550	0.1875	0.234	0.0781	0.023	0.003	FE1397	0.1094	239	67	114	6	0.0394
0.0781	0.25	0.296	0.0937	0.023	0.003	FE5/64	0.125	286	90	95	7	0.0394
0.0937	0.1875	0.234	0.0625	0.018	0.003	FE2380	0.0937	192	59	94	7	0.0313
0.0937	0.3125	0.359	0.1094	0.023	0.005	FE3/32	0.1406	644	215	62	7	0.0625
0.1250	0.25	0.296	0.0937	0.023	0.003	FE3175	0.125	292	97	80	7	0.0394
0.1250	0.3125	0.359	0.1094	0.023	0.003	FE1/8A	0.1406	644	215	65	7	0.0625
0.1250	0.375	0.44	0.1562	0.03	0.012	FE1/8B	0.1875	720	260	61	8	0.0625
0.1562	0.3125	0.359	0.1094	0.023	0.003	FE3967	0.1406	391	165	62	11	0.0394
0.1875	0.312 5	0.359	0.1094	0.023	0.003	FE4763A	0.1406	391	165	65	11	0.0394
0.1875	0.375	0.422	0.125	0.023	0.003	FE4763B	0.1562	730	271	56	8	0.0625
0.2500	0.375	0.422	0.125	0.023	0.003	FE6350A	0.1562	391	165	54	11	0.0394
0.2500	0.5	0.547	0.125	0.023	0.005	FE6350B	0.1562	730	271	38	8	0.0781
0.2500	0.625	0.69	0.196	0.042	0.012	FE1/4A	0.2272	1.651	670	43	8	0.0984
0.3125	0.5	0.547	0.1562	0.031	0.005	FE7938	0.1875	539	279	45	12	0.0469

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2Z & 2RZ SHIELD BALL BEARINGS

Metric Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	2Z /2RZ Shield Part No	Shield Width (B1)	Load Rating Cr(N)	Load Rating Cor(N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
1.5	4	5	2	0.6	0.05	68/1.5-2Z		163	44	153	6	0.794
1.5	5		2		0.15	69/1.5/002-2Z		192	59	93	7	0.794
1.5	5	6.5	2.6	0.8	0.15	69/1.5-2Z		192	59	109	7	0.794
2	5	6.1	2.3	0.6	0.08	682-2Z	3.1	192	59	116	7	0.794
2	6	7.5	2.3	0.6	0.15	692-2Z	3.1	286	90	91	7	1
2.35 ⁽⁷⁾	5		2.3		0.08	67/2.35-2Z		192	59	120	7	0.794
2.5	6	7.1	2.6	0.8	0.08	68/2.5-2Z	3.4	289	92	101	7	1
2.5	7	8.1	3	0.8	0.1	683/0001-2Z		432	149	88	8	1.191
2.5	7	8.5	3.5	0.9	0.15	69/2.5-2Z	4.3	432	149	87	8	1.191
2.5	8		2.8		0.15	60/2.5-2Z	3.6	432	149	81	8	1.191
3	6	7.2	2	0.6	0.08	673-2Z		195	60	81	8	1
3	7	8.1	3	0.8	0.1	683-2Z	3.8	432	149	90	8	1.191
3	8	9.5	3	0.7	0.15	693/002-2Z	3.8	644	215	67	7	1.588
3	8	9.5	4	0.9	0.15	693-2Z	4.8	644	215	80	7	1.588
3	10	11.5	4	1	0.15	623-2Z	4.8	725	265	65	8	1.588
4	7	8.2	2	0.6	0.08	674-2Z		345	130	63	9	1
4	9	10.3	4	1	0.1	684-2Z	4.8	658	226	82	7	1.588
4	10	11.5	4	1	0.1	684/10-2Z	4.8	658	226	86	7	1.588
4	11	12.5	4	1	0.15	694-2Z	4.8	730	271	66	8	1.588
4	12	13.5	4	1	0.15	604-2Z	4.8	734	282	56	8	1.588
4	13	15	5	1	0.2	624-2Z	5.8	1.339	488	52	7	2.381
4	16	18	5	1	0.3	634-2Z	5.8	1.646	663	44	8	2.5
4	16	18	5	1	0.3	634D-2Z		1.935	677	44	6	3.175
5	8	9.2	2	0.6	0.08	675-2Z		390	160	52	11	1
5	10		4		0.08	694/1002-2Z		730	271	66	8	1.588
5	11	12.5	4	1	0.15	685/003-2Z		734	282	62	8	1.588
5	11	12.5	5	1	0.15	685-2Z	5.8	734	282	71	8	1.588
5	13	15	4	1	0.2	695-2Z	4.8	851	366	49	10	1.588
5	13		5		0.2	624/0003-2Z		1.339	488	53	7	2.381
5	14	16	5	1	0.2	605-2Z	5.8	1.096	437	50	8	1.984
5	16	18	5	1	0.3	625-2Z	5.8	1.646	663	42	8	2.5
5	16	18	5	1	0.3	625D-2Z		1.935	677	45	6	3.175
5	19	22	6	1.5	0.3	635-2Z	6.8	2.522	1.057	35	8	3.175
6	12		4		0.15	695/1202-2Z		851	366	49	10	1.588
6	13	15	5	1.1	0.15	686-2Z	5.8	1.096	437	55	8	1.984
6	15	17	5	1.2	0.2	696-2Z	5.8	1.186	505	46	9	1.984
6	16		5		0.3	625/0002-2Z		1.646	663	41	8	2.5
6	19	22	6	1.5	0.3	626-2Z	6.8	2.522	1.057	34	8	3.175
7	14	16	5	1.1	0.15	687-2Z	5.8	1.186	505	50	9	1.984
7	17	19	5	1.2	0.3	697-2Z	5.8	1.795	776	39	9	2.5
7	19	22	6	1.5	0.3	607-2Z	6.8	2.522	1.057	38	8	3.175
7	22	25	7	1.5	0.3	627-2Z		3.369	1.363	35	7	3.969
8	14		4		0.02	688A/142-2Z		335	152	47	12	1.191
8	16	18	6	1.3	0.2	688-2Z	6.8	1.795	776	48	9	2.5
8	16	18	5	1.1	0.2	688/003-2Z		1.795	776	43	9	2.5
8	19	22	6	1.5	0.3	698-2Z	6.8	1.798	797	40	9	2.5
8	22	25	7	1.5	0.3	608-2Z		3.369	1.363	38	7	3.969
9	17	19	6	1.3	0.2	689-2Z	6.8	1.798	797	44	9	2.5
9	20		6		0.3	699-2Z		1.922	915	35	10	2.5
9	24		7		0.3	609-2Z		3.435	1.43	33	7	3.969
9	24		7		0.3	609D-2Z		3.758	1.632	32	8	3.969
9	26		8		0.3	629-2Z		4.698	1.982	34	7	4.763
10	19	21	5	1	0.3	6800/002-2Z		1.922	915	34	10	2.5
10	19	21	7	1.5	0.3	6800-2Z	7.8	1.922	915	42	10	2.5
10	22		6		0.3	6900-2Z		2.555	1.129	31	8	3.175
10	26		8		0.3	6000-2Z		4.698	1.982	32	7	4.763
10	30		9		0.6	6200-2Z		6.1	2.6	29	7	5.556
10	30		9		0.6	6200D-2Z		5.236	2.374	27	8	4.763
12	21		5		0.3	6801-2Z		1.93	900	30	12	2.381
12	21		5		0.3	6801-2RZ		1.93	900	30	12	2.381
12	24		6		0.3	6901-2Z		2.971	1.452	27	10	3.175
12	24		6		0.3	6901-2RZ		2.971	1.452	27	10	3.175
12	28		8		0.3	6001-2Z		5.237	2.359	28	9	3.969
12	32		10		0.6	6201-2Z		7.073	3.1	26	7	6
15	24		5		0.3	6802-2Z		2.08	1.1	25	14	2.381
15	24		5		0.3	6802-2RZ		2.08	1.1	25	14	2.381
15	28		7		0.3	6902-2Z		4.445	2.268	24	11	3.175
15	28		7		0.3	6902-2RZ		4.445	2.268	24	11	3.175
15	32		9		0.3	6002-2Z		5.676	2.819	26	9	4.763
15	35		11		0.6	6202-2Z		7.939	3.744	23	8	6
17	26		5		0.3	6803-2Z		2.24	1.27	22	16	2.381
17	26		5		0.3	6803-2RZ		2.24	1.27	22	16	2.381
17	30		7		0.3	6903-2Z		4.723	2.547	21	11	3.969
17	30		7		0.3	6903-2RZ		4.723	2.547	21	11	3.969
17	35		10		0.3	6003-2Z		6.172	3.267	23	10	4.763
17	40		12		0.6	6203-2Z		9.811	4.734	20	8	6.747

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2Z SHIELD FLANGE BALL BEARINGS

Inch Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	2Z Flange Shield Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
0.0469	0.1562	0.203	0.0937	0.013	0.003	F1191-2Z	0.125	163	44	164	6	0.03125
0.055	0.1875	0.234	0.1094	0.031	0.003	F1397-2Z	0.1406	239	67	140	6	0.0394
0.0781	0.25	0.296	0.1406	0.031	0.003	F5/64-2Z	0.1719	286	90	117	7	0.0394
0.0937	0.1875	0.234	0.0937	0.031	0.003	F2380-2Z	0.125	192	59	120	7	0.03125
0.0937	0.3125	0.359	0.1406	0.031	0.005	F3/32-2Z	0.1719	644	215	72	7	0.0625
0.125	0.25	0.296	0.1094	0.031	0.003	F3175-2Z	0.1406	292	97	87	7	0.0394
0.125	0.3125	0.359	0.1406	0.031	0.003	F1/8A-2Z	0.1719	644	215	75	7	0.0625
0.125	0.375	0.422	0.1406	0.031	0.003	F1/8A/6-2Z	0.1719	644	215	82	7	0.0625
0.125	0.375	0.44	0.1562	0.03	0.012	F1/8B-2Z	0.1875	720	260	61	8	0.0625
0.1562	0.3125	0.359	0.125	0.036	0.003	F3967-2Z	0.1562	391	165	68	11	0.0394
0.1875	0.3125	0.359	0.125	0.036	0.003	F4763A-2Z	0.1562	391	165	70	11	0.0394
0.1875	0.375	0.422	0.125	0.031	0.003	F4763B-2Z	0.1562	730	271	56	8	0.0625
0.1875	0.5	0.565	0.196	0.042	0.012	F3/16-2Z	0.2272	1.339	488	57	7	0.0938
0.1875	0.625	0.69		0.042	0.012	F1/4A/0001-2Z		1.651	670	41	8	0.0984
0.25	0.375	0.422	0.125	0.036	0.003	F6350A-2Z	0.1562	391	165	54	11	0.0394
0.25	0.5	0.547	0.1875	0.045	0.005	F6350B-2Z	0.2188	730	271	49	8	0.0781
0.25	0.625	0.69	0.196	0.042	0.012	F1/4A-2Z	0.2272	1.651	670	43	8	0.0984
0.3125	0.5	0.547	0.1562	0.031	0.005	F7938-2Z	0.1875	539	279	45	12	0.0469
0.375	0.875	0.969	0.2182	0.062	0.016	F3/8-2Z		2.555	1.129	35	8	0.125
0.5	1.125	1.225	0.3125	0.062	0.016	F1/2-2Z		4.12	2.01	32	9	0.15625

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2Z & 2RZ FLANGE SHIELD BALL BEARINGS

Metric Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	2Z / 2RZ Flange Shield Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
1.5	4	5	2	0.6	0.05	F68/1.5 -2Z		163	44	153	6	0.794
1.5	5	6.5	2.6	0.8	0.15	F69/1.5-2Z		192	59	109	7	0.794
2	5	6.1	2.3	0.6	0.08	F682-2Z	3.1	192	59	116	7	0.794
2	6	7.5	2.3	0.6	0.15	F692-2Z	3.1	286	90	91	7	1
2.5	6	7.1	2.6	0.8	0.08	F68/2.5-2Z	3.4	289	92	101	7	1
2.5	7	8.1	3	0.8	0.1	F683/0001-2Z		432	149	88	8	1.191
2.5	7	8.5	3.5	0.9	0.15	F69/2.5-2Z	4.3	432	149	87	8	1.191
3	7	8.1	3	0.8	0.1	F683-2Z	3.8	432	149	90	8	1.191
3	8	9.5	3	0.7	0.15	693/002-2Z	3.8	644	215	67	7	1.588
3	8	9.5	4	0.9	0.15	F693-2Z	4.8	644	215	80	7	1.588
3	10	11.5	4	1	0.15	F623-2Z	4.8	725	265	65	8	1.588
4	9	10.3	4	1	0.1	F684-2Z	4.8	658	226	82	7	1.588
4	10	11.5	4	1	0.1	F684/10-2Z	4.8	658	226	86	7	1.588
4	11	12.5	4	1	0.15	694-2Z	4.8	730	271	66	8	1.588
4	12	13.5	4	1	0.15	F604-2Z	4.8	734	282	56	8	1.588
4	13	15	5	1	0.2	F624-2Z	5.8	1.339	488	52	7	2.381
4	16	18	5	1	0.3	F634-2Z	5.8	1.646	663	44	8	2.5
5	11	12.5	4	1	0.15	F685/003-2Z		734	282	62	8	1.588
5	11	12.5	5	1	0.15	F685-2Z	5.8	734	282	71	8	1.588
5	13	15	4	1	0.2	F695-2Z	4.8	851	366	49	10	1.588
5	14	16	5	1	0.2	F605-2Z	5.8	1.096	437	50	8	1.984
5	16	18	5	1	0.3	F625-2Z	5.8	1.646	663	42	8	2.5
5	19	22	6	1.5	0.3	F635-2Z	6.8	2.522	1.057	35	8	3.175
6	13	15	5	1.1	0.15	F686-2Z	5.8	1.096	437	55	8	1.984
6	15	17	5	1.2	0.2	F696-2Z	5.8	1.186	505	46	9	1.984
6	19	22	6	1.5	0.3	F626-2Z	6.8	2.522	1.057	34	8	3.175
7	14	16	5	1.1	0.15	F687-2Z	5.8	1.186	505	50	9	1.984
7	17	19	5	1.2	0.3	F697-2Z	5.8	1.795	776	39	9	2.5
7	19	22	6	1.5	0.3	F607-2Z	6.8	2.522	1.057	38	8	3.175
7	22	25	7	1.5	0.3	F627-2Z		3.369	1.363	35	7	3.969
8	16	18	6	1.3	0.2	F688-2Z	6.8	1.795	776	48	9	2.5
8	16	18	5	1.1	0.2	F688/003-2Z		1.795	776	43	9	2.5
8	19	22	6	1.5	0.3	F698-2Z	6.8	1.798	797	40	9	2.5
8	22	25	7	1.5	0.3	F608-2Z		3.369	1.363	38	7	3.969
9	17	19	6	1.3	0.2	F689-2Z	6.8	1.798	797	44	9	2.5
10	19	21	5	1	0.3	F6800/002-2Z		1.922	915	34	10	2.5
10	19	21	7	1.5	0.3	F6800-2Z	7.8	1.922	915	42	10	2.5

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2Z SHIELD FLANGE EXTENDED INNER RING BALL BEARINGS

Inch Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	Flanged Ext Inner Ring 2Z Seal Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
0.0469	0.1562	0.203	0.0937	0.013	0.003	FE1191-2Z	0.125	163	44	164	6	0.03125
0.055	0.1875	0.234	0.1094	0.031	0.003	FE1397-2Z	0.1406	239	67	140	6	0.0394
0.0781	0.25	0.296	0.1406	0.031	0.003	FE5/64-2Z	0.1719	286	90	117	7	0.0394
0.0937	0.1875	0.234	0.0937	0.031	0.003	FE2380-2Z	0.125	192	59	120	7	0.03125
0.0937	0.3125	0.359	0.1406	0.031	0.005	F3/32-2Z	0.1719	644	215	72	7	0.0625
0.125	0.25	0.296	0.1094	0.031	0.003	FE3175-2Z	0.1406	292	97	87	7	0.0394
0.125	0.3125	0.359	0.1406	0.031	0.003	FE1/8A-2Z	0.1719	644	215	75	7	0.0625
0.125	0.375	0.422	0.1406	0.031	0.003	FE1/8A/6-2Z	0.1719	644	215	82	7	0.0625
0.125	0.375	0.44	0.1562	0.03	0.012	FE1/8B-2Z	0.1875	720	260	61	8	0.0625
0.1562	0.3125	0.359	0.125	0.036	0.003	FE3967-2Z	0.1562	391	165	68	11	0.0394
0.1875	0.3125	0.359	0.125	0.036	0.003	FE4763A-2Z	0.1562	391	165	70	11	0.0394
0.1875	0.375	0.422	0.125	0.031	0.003	FE4763B-2Z	0.1562	730	271	56	8	0.0625
0.1875	0.5	0.565	0.196	0.042	0.012	FE3/16-2Z	0.2272	1.339	488	57	7	0.0938
0.1875	0.625	0.69		0.042	0.012	FE1/4A/0001-2Z		1.651	670	41	8	0.0984
0.25	0.375	0.422	0.125	0.036	0.003	FE6350A-2Z	0.1562	391	165	54	11	0.0394
0.25	0.5	0.547	0.1875	0.045	0.005	FE6350B-2Z	0.2188	730	271	49	8	0.0781
0.25	0.625	0.69	0.196	0.042	0.012	FE1/4A-2Z	0.2272	1.651	670	43	8	0.0984
0.3125	0.5	0.547	0.1562	0.031	0.005	FE7938-2Z	0.1875	539	279	45	12	0.0469

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2Z & 2RZ FLANGE SHIELD EXTENDED INNER RING BALL BEARINGS

Metric Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	Extended Inner Ring 2Z/2RZ Shield Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
2	5	6.1	2.3	0.6	0.08	E682-2Z	3.1	192	59	116	7	0.794
2	6	7.5	2.3	0.6	0.15	E692-2Z	3.1	286	90	91	7	1
2.5	6	7.1	2.6	0.8	0.08	E68/2.5-2Z	3.4	289	92	101	7	1
2.5	7	8.5	3.5	0.9	0.15	E69/2.5-2Z	4.3	432	149	87	8	1.191
2.5	8		2.8		0.15	E60/2.5-2Z	3.6	432	149	81	8	1.191
3	7	8.1	3	0.8	0.1	E683-2Z	3.8	432	149	90	8	1.191
3	8	9.5	3	0.7	0.15	E693/002-2Z	3.8	644	215	67	7	1.588
3	8	9.5	4	0.9	0.15	E693-2Z	4.8	644	215	80	7	1.588
3	10	11.5	4	1	0.15	E623-2Z	4.8	725	265	65	8	1.588
4	9	10.3	4	1	0.1	E684-2Z	4.8	658	226	82	7	1.588
4	10	11.5	4	1	0.1	E684/10-2Z	4.8	658	226	86	7	1.588
4	11	12.5	4	1	0.15	E694-2Z	4.8	730	271	66	8	1.588
4	12	13.5	4	1	0.15	E604-2Z	4.8	734	282	56	8	1.588
4	13	15	5	1	0.2	E624-2Z	5.8	1.339	488	52	7	2.381
4	16	18	5	1	0.3	E634-2Z	5.8	1.646	663	44	8	2.5
5	11	12.5	5	1	0.15	E685-2Z	5.8	734	282	71	8	1.588
5	13	15	4	1	0.2	E695-2Z	4.8	851	366	49	10	1.588
5	14	16	5	1	0.2	E605-2Z	5.8	1.096	437	50	8	1.984
5	16	18	5	1	0.3	E625-2Z	5.8	1.646	663	42	8	2.5
5	19	22	6	1.5	0.3	E635-2Z	6.8	2.522	1.057	35	8	3.175
6	13	15	5	1.1	0.15	E686-2Z	5.8	1.096	437	55	8	1.984
6	15	17	5	1.2	0.2	E696-2Z	5.8	1.186	505	46	9	1.984
6	19	22	6	1.5	0.3	E626-2Z	6.8	2.522	1.057	34	8	3.175
7	14	16	5	1.1	0.15	E687-2Z	5.8	1.186	505	50	9	1.984
7	17	19	5	1.2	0.3	E697-2Z	5.8	1.795	776	39	9	2.5
7	19	22	6	1.5	0.3	E607-2Z	6.8	2.522	1.057	38	8	3.175
8	16	18	6	1.3	0.2	E688-2Z	6.8	1.795	776	48	9	2.5
8	19	22	6	1.5	0.3	E698-2Z	6.8	1.798	797	40	9	2.5
8	22	25	7	1.5	0.3	E608-2Z		3.369	1.363	38	7	3.969
9	17	19	6	1.3	0.2	E689-2Z	6.8	1.798	797	44	9	2.5
10	19	21	7	1.5	0.3	E6800-2Z	7.8	1.922	915	42	10	2.5

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2Z SHIELD EXTENDED INNER RING BALL BEARINGS

Inch Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	Ext Inner Ring 2Z Shield Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
0.0469	0.1562	0.203	0.0937	0.013	0.003	E1191-2Z	0.125	163	44	164	6	0.03125
0.055	0.1875	0.234	0.1094	0.031	0.003	E1397-2Z	0.1406	239	67	140	6	0.0394
0.0781	0.25	0.296	0.1406	0.031	0.003	E5/64-2Z	0.1719	286	90	117	7	0.0394
0.0937	0.1875	0.234	0.0937	0.031	0.003	E2380-2Z	0.125	192	59	120	7	0.03125
0.0937	0.3125	0.359	0.1406	0.031	0.005	E3/32-2Z	0.1719	644	215	72	7	0.0625
0.125	0.25		0.0937		0.003	E3175/002-2Z	0.125	292	97	80	7	0.0394
0.125	0.25	0.296	0.1094	0.031	0.003	E3175-2Z	0.1406	292	97	87	7	0.0394
0.125	0.3125	0.359	0.1406	0.031	0.003	E1/8A-2Z	0.1719	644	215	75	7	0.0625
0.125	0.375	0.422	0.1406	0.031	0.003	E1/8A/6-2Z	0.1719	644	215	82	7	0.0625
0.125	0.375	0.44	0.1562	0.03	0.012	E1/8B-2Z	0.1875	720	260	61	8	0.0625
0.1562	0.3125		0.1094		0.003	E3967/003-2Z	0.1406	391	165	62	11	0.0394
0.1562	0.3125	0.359	0.125	0.036	0.003	E3967-2Z	0.1562	391	165	68	11	0.0394
0.1562	0.5		0.1094		0.003	E3967/082-2Z	0.1406	391	165	69	11	0.0394
0.1875	0.3125		0.1094		0.003	E4763A/002-2Z	0.1406	391	165	65	11	0.0394
0.1875	0.3125	0.359	0.125	0.036	0.003	E4763A-2Z	0.1562	391	165	70	11	0.0394
0.1875	0.375	0.422	0.125	0.031	0.003	E4763B-2Z	0.1562	730	271	56	8	0.0625
0.1875	0.5		0.1094		0.003	E4763A/082-2Z	0.1406	391	162	70	11	0.0394
0.1875	0.5	0.565	0.196	0.042	0.012	E3/16-2Z	0.2272	1.339	488	57	7	0.0938
0.1875	0.625	0.69		0.042	0.012	E1/4A/0001-2Z		1.651	670	41	8	0.0984
0.25	0.375	0.422	0.125	0.036	0.003	E6350A-2Z	0.1562	391	165	54	11	0.0394
0.25	0.5	0.547	0.1875	0.045	0.005	E6350B-2Z	0.2188	730	271	49	8	0.0781
0.25	0.625	0.69	0.196	0.042	0.012	E1/4A-2Z	0.2272	1.651	670	43	8	0.0984
0.3125	0.5	0.547	0.1562	0.031	0.005	E7938-2Z	0.1875	539	279	45	12	0.0469

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2Z SHIELD EXTENDED INNER RING BALL BEARINGS

Inch Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	Ext Inner Ring 2Z Shield Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
0.0469	0.1562	0.203	0.0937	0.013	0.003	E1191-2Z	0.125	163	44	164	6	0.03125
0.055	0.1875	0.234	0.1094	0.031	0.003	E1397-2Z	0.1406	239	67	140	6	0.0394
0.0781	0.25	0.296	0.1406	0.031	0.003	E5/64-2Z	0.1719	286	90	117	7	0.0394
0.0937	0.1875	0.234	0.0937	0.031	0.003	E2380-2Z	0.125	192	59	120	7	0.03125
0.0937	0.3125	0.359	0.1406	0.031	0.005	E3/32-2Z	0.1719	644	215	72	7	0.0625
0.125	0.25		0.0937		0.003	E3175/002-2Z	0.125	292	97	80	7	0.0394
0.125	0.25	0.296	0.1094	0.031	0.003	E3175-2Z	0.1406	292	97	87	7	0.0394
0.125	0.3125	0.359	0.1406	0.031	0.003	E1/8A-2Z	0.1719	644	215	75	7	0.0625
0.125	0.375	0.422	0.1406	0.031	0.003	E1/8A/6-2Z	0.1719	644	215	82	7	0.0625
0.125	0.375	0.44	0.1562	0.03	0.012	E1/8B-2Z	0.1875	720	260	61	8	0.0625
0.1562	0.3125		0.1094		0.003	E3967/003-2Z	0.1406	391	165	62	11	0.0394
0.1562	0.3125	0.359	0.125	0.036	0.003	E3967-2Z	0.1562	391	165	68	11	0.0394
0.1562	0.5		0.1094		0.003	E3967/082-2Z	0.1406	391	165	69	11	0.0394
0.1875	0.3125		0.1094		0.003	E4763A/002-2Z	0.1406	391	165	65	11	0.0394
0.1875	0.3125	0.359	0.125	0.036	0.003	E4763A-2Z	0.1562	391	165	70	11	0.0394
0.1875	0.375	0.422	0.125	0.031	0.003	E4763B-2Z	0.1562	730	271	56	8	0.0625
0.1875	0.5		0.1094		0.003	E4763A/082-2Z	0.1406	391	162	70	11	0.0394
0.1875	0.5	0.565	0.196	0.042	0.012	E3/16-2Z	0.2272	1.339	488	57	7	0.0938
0.1875	0.625	0.69		0.042	0.012	E1/4A/0001-2Z		1.651	670	41	8	0.0984
0.25	0.375	0.422	0.125	0.036	0.003	E6350A-2Z	0.1562	391	165	54	11	0.0394
0.25	0.5	0.547	0.1875	0.045	0.005	E6350B-2Z	0.2188	730	271	49	8	0.0781
0.25	0.625	0.69	0.196	0.042	0.012	E1/4A-2Z	0.2272	1.651	670	43	8	0.0984
0.3125	0.5	0.547	0.1562	0.031	0.005	E7938-2Z	0.1875	539	279	45	12	0.0469

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2Z SHIELD EXTENDED INNER RING BALL BEARINGS

Inch Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	Ext Inner Ring 2Z Shield Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
0.0469	0.1562	0.203	0.0937	0.013	0.003	E1191-2Z	0.125	163	44	164	6	0.03125
0.055	0.1875	0.234	0.1094	0.031	0.003	E1397-2Z	0.1406	239	67	140	6	0.0394
0.0781	0.25	0.296	0.1406	0.031	0.003	E5/64-2Z	0.1719	286	90	117	7	0.0394
0.0937	0.1875	0.234	0.0937	0.031	0.003	E2380-2Z	0.125	192	59	120	7	0.03125
0.0937	0.3125	0.359	0.1406	0.031	0.005	E3/32-2Z	0.1719	644	215	72	7	0.0625
0.125	0.25		0.0937		0.003	E3175/002-2Z	0.125	292	97	80	7	0.0394
0.125	0.25	0.296	0.1094	0.031	0.003	E3175-2Z	0.1406	292	97	87	7	0.0394
0.125	0.3125	0.359	0.1406	0.031	0.003	E1/8A-2Z	0.1719	644	215	75	7	0.0625
0.125	0.375	0.422	0.1406	0.031	0.003	E1/8A/6-2Z	0.1719	644	215	82	7	0.0625
0.125	0.375	0.44	0.1562	0.03	0.012	E1/8B-2Z	0.1875	720	260	61	8	0.0625
0.1562	0.3125		0.1094		0.003	E3967/003-2Z	0.1406	391	165	62	11	0.0394
0.1562	0.3125	0.359	0.125	0.036	0.003	E3967-2Z	0.1562	391	165	68	11	0.0394
0.1562	0.5		0.1094		0.003	E3967/082-2Z	0.1406	391	165	69	11	0.0394
0.1875	0.3125		0.1094		0.003	E4763A/002-2Z	0.1406	391	165	65	11	0.0394
0.1875	0.3125	0.359	0.125	0.036	0.003	E4763A-2Z	0.1562	391	165	70	11	0.0394
0.1875	0.375	0.422	0.125	0.031	0.003	E4763B-2Z	0.1562	730	271	56	8	0.0625
0.1875	0.5		0.1094		0.003	E4763A/082-2Z	0.1406	391	162	70	11	0.0394
0.1875	0.5	0.565	0.196	0.042	0.012	E3/16-2Z	0.2272	1.339	488	57	7	0.0938
0.1875	0.625	0.69		0.042	0.012	E1/4A/0001-2Z		1.651	670	41	8	0.0984
0.25	0.375	0.422	0.125	0.036	0.003	E6350A-2Z	0.1562	391	165	54	11	0.0394
0.25	0.5	0.547	0.1875	0.045	0.005	E6350B-2Z	0.2188	730	271	49	8	0.0781
0.25	0.625	0.69	0.196	0.042	0.012	E1/4A-2Z	0.2272	1.651	670	43	8	0.0984
0.3125	0.5	0.547	0.1562	0.031	0.005	E7938-2Z	0.1875	539	279	45	12	0.0469

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2Z SHIELD EXTENDED INNER RING BALL BEARINGS

Inch Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	Ext Inner Ring 2Z Shield Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
0.0469	0.1562	0.203	0.0937	0.013	0.003	E1191-2Z	0.125	163	44	164	6	0.03125
0.055	0.1875	0.234	0.1094	0.031	0.003	E1397-2Z	0.1406	239	67	140	6	0.0394
0.0781	0.25	0.296	0.1406	0.031	0.003	E5/64-2Z	0.1719	286	90	117	7	0.0394
0.0937	0.1875	0.234	0.0937	0.031	0.003	E2380-2Z	0.125	192	59	120	7	0.03125
0.0937	0.3125	0.359	0.1406	0.031	0.005	E3/32-2Z	0.1719	644	215	72	7	0.0625
0.125	0.25		0.0937		0.003	E3175/002-2Z	0.125	292	97	80	7	0.0394
0.125	0.25	0.296	0.1094	0.031	0.003	E3175-2Z	0.1406	292	97	87	7	0.0394
0.125	0.3125	0.359	0.1406	0.031	0.003	E1/8A-2Z	0.1719	644	215	75	7	0.0625
0.125	0.375	0.422	0.1406	0.031	0.003	E1/8A/6-2Z	0.1719	644	215	82	7	0.0625
0.125	0.375	0.44	0.1562	0.03	0.012	E1/8B-2Z	0.1875	720	260	61	8	0.0625
0.1562	0.3125		0.1094		0.003	E3967/003-2Z	0.1406	391	165	62	11	0.0394
0.1562	0.3125	0.359	0.125	0.036	0.003	E3967-2Z	0.1562	391	165	68	11	0.0394
0.1562	0.5		0.1094		0.003	E3967/082-2Z	0.1406	391	165	69	11	0.0394
0.1875	0.3125		0.1094		0.003	E4763A/002-2Z	0.1406	391	165	65	11	0.0394
0.1875	0.3125	0.359	0.125	0.036	0.003	E4763A-2Z	0.1562	391	165	70	11	0.0394
0.1875	0.375	0.422	0.125	0.031	0.003	E4763B-2Z	0.1562	730	271	56	8	0.0625
0.1875	0.5		0.1094		0.003	E4763A/082-2Z	0.1406	391	162	70	11	0.0394
0.1875	0.5	0.565	0.196	0.042	0.012	E3/16-2Z	0.2272	1.339	488	57	7	0.0938
0.1875	0.625	0.69		0.042	0.012	E1/4A/0001-2Z		1.651	670	41	8	0.0984
0.25	0.375	0.422	0.125	0.036	0.003	E6350A-2Z	0.1562	391	165	54	11	0.0394
0.25	0.5	0.547	0.1875	0.045	0.005	E6350B-2Z	0.2188	730	271	49	8	0.0781
0.25	0.625	0.69	0.196	0.042	0.012	E1/4A-2Z	0.2272	1.651	670	43	8	0.0984
0.3125	0.5	0.547	0.1562	0.031	0.005	E7938-2Z	0.1875	539	279	45	12	0.0469

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2Z SHIELD EXTENDED INNER RING BALL BEARINGS

Inch Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	Ext Inner Ring 2Z Shield Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
0.0469	0.1562	0.203	0.0937	0.013	0.003	E1191-2Z	0.125	163	44	164	6	0.03125
0.055	0.1875	0.234	0.1094	0.031	0.003	E1397-2Z	0.1406	239	67	140	6	0.0394
0.0781	0.25	0.296	0.1406	0.031	0.003	E5/64-2Z	0.1719	286	90	117	7	0.0394
0.0937	0.1875	0.234	0.0937	0.031	0.003	E2380-2Z	0.125	192	59	120	7	0.03125
0.0937	0.3125	0.359	0.1406	0.031	0.005	E3/32-2Z	0.1719	644	215	72	7	0.0625
0.125	0.25		0.0937		0.003	E3175/002-2Z	0.125	292	97	80	7	0.0394
0.125	0.25	0.296	0.1094	0.031	0.003	E3175-2Z	0.1406	292	97	87	7	0.0394
0.125	0.3125	0.359	0.1406	0.031	0.003	E1/8A-2Z	0.1719	644	215	75	7	0.0625
0.125	0.375	0.422	0.1406	0.031	0.003	E1/8A/6-2Z	0.1719	644	215	82	7	0.0625
0.125	0.375	0.44	0.1562	0.03	0.012	E1/8B-2Z	0.1875	720	260	61	8	0.0625
0.1562	0.3125		0.1094		0.003	E3967/003-2Z	0.1406	391	165	62	11	0.0394
0.1562	0.3125	0.359	0.125	0.036	0.003	E3967-2Z	0.1562	391	165	68	11	0.0394
0.1562	0.5		0.1094		0.003	E3967/082-2Z	0.1406	391	165	69	11	0.0394
0.1875	0.3125		0.1094		0.003	E4763A/002-2Z	0.1406	391	165	65	11	0.0394
0.1875	0.3125	0.359	0.125	0.036	0.003	E4763A-2Z	0.1562	391	165	70	11	0.0394
0.1875	0.375	0.422	0.125	0.031	0.003	E4763B-2Z	0.1562	730	271	56	8	0.0625
0.1875	0.5		0.1094		0.003	E4763A/082-2Z	0.1406	391	162	70	11	0.0394
0.1875	0.5	0.565	0.196	0.042	0.012	E3/16-2Z	0.2272	1.339	488	57	7	0.0938
0.1875	0.625	0.69		0.042	0.012	E1/4A/0001-2Z		1.651	670	41	8	0.0984
0.25	0.375	0.422	0.125	0.036	0.003	E6350A-2Z	0.1562	391	165	54	11	0.0394
0.25	0.5	0.547	0.1875	0.045	0.005	E6350B-2Z	0.2188	730	271	49	8	0.0781
0.25	0.625	0.69	0.196	0.042	0.012	E1/4A-2Z	0.2272	1.651	670	43	8	0.0984
0.3125	0.5	0.547	0.1562	0.031	0.005	E7938-2Z	0.1875	539	279	45	12	0.0469

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2Z SHIELD EXTENDED INNER RING BALL BEARINGS

Inch Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	Ext Inner Ring 2Z Shield Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
0.0469	0.1562	0.203	0.0937	0.013	0.003	E1191-2Z	0.125	163	44	164	6	0.03125
0.055	0.1875	0.234	0.1094	0.031	0.003	E1397-2Z	0.1406	239	67	140	6	0.0394
0.0781	0.25	0.296	0.1406	0.031	0.003	E5/64-2Z	0.1719	286	90	117	7	0.0394
0.0937	0.1875	0.234	0.0937	0.031	0.003	E2380-2Z	0.125	192	59	120	7	0.03125
0.0937	0.3125	0.359	0.1406	0.031	0.005	E3/32-2Z	0.1719	644	215	72	7	0.0625
0.125	0.25		0.0937		0.003	E3175/002-2Z	0.125	292	97	80	7	0.0394
0.125	0.25	0.296	0.1094	0.031	0.003	E3175-2Z	0.1406	292	97	87	7	0.0394
0.125	0.3125	0.359	0.1406	0.031	0.003	E1/8A-2Z	0.1719	644	215	75	7	0.0625
0.125	0.375	0.422	0.1406	0.031	0.003	E1/8A/6-2Z	0.1719	644	215	82	7	0.0625
0.125	0.375	0.44	0.1562	0.03	0.012	E1/8B-2Z	0.1875	720	260	61	8	0.0625
0.1562	0.3125		0.1094		0.003	E3967/003-2Z	0.1406	391	165	62	11	0.0394
0.1562	0.3125	0.359	0.125	0.036	0.003	E3967-2Z	0.1562	391	165	68	11	0.0394
0.1562	0.5		0.1094		0.003	E3967/082-2Z	0.1406	391	165	69	11	0.0394
0.1875	0.3125		0.1094		0.003	E4763A/002-2Z	0.1406	391	165	65	11	0.0394
0.1875	0.3125	0.359	0.125	0.036	0.003	E4763A-2Z	0.1562	391	165	70	11	0.0394
0.1875	0.375	0.422	0.125	0.031	0.003	E4763B-2Z	0.1562	730	271	56	8	0.0625
0.1875	0.5		0.1094		0.003	E4763A/082-2Z	0.1406	391	162	70	11	0.0394
0.1875	0.5	0.565	0.196	0.042	0.012	E3/16-2Z	0.2272	1.339	488	57	7	0.0938
0.1875	0.625	0.69		0.042	0.012	E1/4A/0001-2Z		1.651	670	41	8	0.0984
0.25	0.375	0.422	0.125	0.036	0.003	E6350A-2Z	0.1562	391	165	54	11	0.0394
0.25	0.5	0.547	0.1875	0.045	0.005	E6350B-2Z	0.2188	730	271	49	8	0.0781
0.25	0.625	0.69	0.196	0.042	0.012	E1/4A-2Z	0.2272	1.651	670	43	8	0.0984
0.3125	0.5	0.547	0.1562	0.031	0.005	E7938-2Z	0.1875	539	279	45	12	0.0469

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2TS SEAL EXTENDED INNER RING BALL BEARINGS

Inch Series

Bore Ø (d)	Outer Ø (D)	Flange Ø FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	2TS Flange Seal Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
0.078	0.25	0.296	0.141	0.031	0.003	F5/64-2TS	0.1719	286	90	65	7	0.0394
0.094	0.313	0.359	0.141	0.031	0.005	F3/32-2TS	0.1719	644	215	51	7	0.0625
0.125	0.25	0.296	0.109	0.031	0.003	F3175-2TS	0.1406	292	97	53	7	0.0394
0.125	0.313	0.359	0.141	0.031	0.003	F1/8A-2TS	0.1719	644	215	51	7	0.0625
0.125	0.375	0.422	0.141	0.031	0.003	F1/8A/6-2TS	0.1719	644	215	51	7	0.0625
0.125	0.375	0.44	0.156	0.03	0.012	F1/8B-2TS	0.1875	720	260	44	8	0.0625
0.156	0.313	0.359	0.125	0.036	0.003	F3967-2TS	0.1562	391	165	42	11	0.0394
0.188	0.313	0.359	0.125	0.036	0.003	F4763A-2TS	0.1562	391	165	42	11	0.0394
0.188	0.375	0.422	0.125	0.031	0.003	F4763B-2TS	0.1562	730	271	41	8	0.0625
0.188	0.5	0.565	0.196	0.042	0.012	F3/16-2TS	0.2272	1.339	488	37	7	0.0938
0.188	0.625	0.69	0.196	0.042	0.012	F1/4A/0001-2TS		1.651	670	31	8	0.0984
0.25	0.375	0.422	0.125	0.036	0.003	F6350A-2TS	0.1562	391	165	35	11	0.0394
0.25	0.5	0.547	0.188	0.045	0.005	F6350B-2TS	0.2188	730	271	33	8	0.0781
0.25	0.625	0.69	0.196	0.042	0.012	F1/4A-2TS	0.2272	1.651	670	31	8	0.0984
0.313	0.5	0.547	0.156	0.031	0.005	F7938-2TS	0.1875	539	279	30	12	0.0469
0.375	0.875	0.969	0.218	0.062	0.016	F3/8-2TS		2.555	1.129	24	8	0.125
0.5	1.125	1.225	0.313	0.062	0.016	F1/2-2TS		4.12	2.01	21	9	0.1563

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2TS SEAL EXTENDED INNER RING BALL BEARINGS

Inch Series

Bore Ø (d)	Outer Ø (D)	Flange Ø FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	2TS Flange Seal Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
0.078	0.25	0.296	0.141	0.031	0.003	F5/64-2TS	0.1719	286	90	65	7	0.0394
0.094	0.313	0.359	0.141	0.031	0.005	F3/32-2TS	0.1719	644	215	51	7	0.0625
0.125	0.25	0.296	0.109	0.031	0.003	F3175-2TS	0.1406	292	97	53	7	0.0394
0.125	0.313	0.359	0.141	0.031	0.003	F1/8A-2TS	0.1719	644	215	51	7	0.0625
0.125	0.375	0.422	0.141	0.031	0.003	F1/8A/6-2TS	0.1719	644	215	51	7	0.0625
0.125	0.375	0.44	0.156	0.03	0.012	F1/8B-2TS	0.1875	720	260	44	8	0.0625
0.156	0.313	0.359	0.125	0.036	0.003	F3967-2TS	0.1562	391	165	42	11	0.0394
0.188	0.313	0.359	0.125	0.036	0.003	F4763A-2TS	0.1562	391	165	42	11	0.0394
0.188	0.375	0.422	0.125	0.031	0.003	F4763B-2TS	0.1562	730	271	41	8	0.0625
0.188	0.5	0.565	0.196	0.042	0.012	F3/16-2TS	0.2272	1.339	488	37	7	0.0938
0.188	0.625	0.69	0.196	0.042	0.012	F1/4A/0001-2TS		1.651	670	31	8	0.0984
0.25	0.375	0.422	0.125	0.036	0.003	F6350A-2TS	0.1562	391	165	35	11	0.0394
0.25	0.5	0.547	0.188	0.045	0.005	F6350B-2TS	0.2188	730	271	33	8	0.0781
0.25	0.625	0.69	0.196	0.042	0.012	F1/4A-2TS	0.2272	1.651	670	31	8	0.0984
0.313	0.5	0.547	0.156	0.031	0.005	F7938-2TS	0.1875	539	279	30	12	0.0469
0.375	0.875	0.969	0.218	0.062	0.016	F3/8-2TS		2.555	1.129	24	8	0.125
0.5	1.125	1.225	0.313	0.062	0.016	F1/2-2TS		4.12	2.01	21	9	0.1563

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2TS SEAL EXTENDED INNER RING BALL BEARINGS

Inch Series

Bore Ø (d)	Outer Ø (D)	Flange Ø FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	2TS Flange Seal Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
0.078	0.25	0.296	0.141	0.031	0.003	F5/64-2TS	0.1719	286	90	65	7	0.0394
0.094	0.313	0.359	0.141	0.031	0.005	F3/32-2TS	0.1719	644	215	51	7	0.0625
0.125	0.25	0.296	0.109	0.031	0.003	F3175-2TS	0.1406	292	97	53	7	0.0394
0.125	0.313	0.359	0.141	0.031	0.003	F1/8A-2TS	0.1719	644	215	51	7	0.0625
0.125	0.375	0.422	0.141	0.031	0.003	F1/8A/6-2TS	0.1719	644	215	51	7	0.0625
0.125	0.375	0.44	0.156	0.03	0.012	F1/8B-2TS	0.1875	720	260	44	8	0.0625
0.156	0.313	0.359	0.125	0.036	0.003	F3967-2TS	0.1562	391	165	42	11	0.0394
0.188	0.313	0.359	0.125	0.036	0.003	F4763A-2TS	0.1562	391	165	42	11	0.0394
0.188	0.375	0.422	0.125	0.031	0.003	F4763B-2TS	0.1562	730	271	41	8	0.0625
0.188	0.5	0.565	0.196	0.042	0.012	F3/16-2TS	0.2272	1.339	488	37	7	0.0938
0.188	0.625	0.69	0.196	0.042	0.012	F1/4A/0001-2TS		1.651	670	31	8	0.0984
0.25	0.375	0.422	0.125	0.036	0.003	F6350A-2TS	0.1562	391	165	35	11	0.0394
0.25	0.5	0.547	0.188	0.045	0.005	F6350B-2TS	0.2188	730	271	33	8	0.0781
0.25	0.625	0.69	0.196	0.042	0.012	F1/4A-2TS	0.2272	1.651	670	31	8	0.0984
0.313	0.5	0.547	0.156	0.031	0.005	F7938-2TS	0.1875	539	279	30	12	0.0469
0.375	0.875	0.969	0.218	0.062	0.016	F3/8-2TS		2.555	1.129	24	8	0.125
0.5	1.125	1.225	0.313	0.062	0.016	F1/2-2TS		4.12	2.01	21	9	0.1563

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2TS SEAL FLANGE EXTENDED INNER RING BALL BEARINGS

Metric Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	Flange Ext Inner Ring 2TS Seal Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
2	5	6.1	2.3	0.6	0.08	FE6822TS	3.1	192	59	71	7	0.794
2	6	7.5	2.3	0.6	0.15	FE6922TS	3.1	286	90	65	7	1
2.5	6	7.1	2.6	0.8	0.08	FE68/2.52TS	3.4	289	92	61	7	1
2.5	7	8.5	3.5	0.9	0.15	FE69/2.52TS	4.3	432	149	53	8	1.191
3	7	8.1	3	0.8	0.1	FE6832TS	3.8	432	149	53	8	1.191
3	8	9.5	4	0.9	0.15	FE6932TS	4.8	644	215	51	7	1.588
3	10	11.5	4	1	0.15	FE56232TS	4.8	725	265	44	8	1.588
4	9	10.3	4	1	0.1	FE6842TS	4.8	658	226	45	7	1.588
4	10	11.5	4	1	0.1	FE684/102TS	4.8	658	226	86	7	1.588
4	11	12.5	4	1	0.15	FE6942TS	4.8	730	271	41	8	1.588
4	12	13.5	4	1	0.15	FE6042TS	4.8	734	282	37	8	1.588
4	13	15	5	1	0.2	FE6242TS	5.8	1.339	488	37	7	2.381
4	16	18	5	1	0.3	FE6342TS	5.8	1.646	663	31	8	2.5
5	11	12.5	5	1	0.15	FE6852TS	5.8	734	282	37	8	1.588
5	13	15	4	1	0.2	FE6952TS	4.8	851	366	34	10	1.588
5	14	16	5	1	0.2	FE6052TS	5.8	1.096	437	33	8	1.984
5	16	18	5	1	0.3	FE6252TS	5.8	1.646	663	31	8	2.5
5	19	22	6	1.5	0.3	FE6352TS	6.8	2.522	1.057	28	8	3.175
6	13	15	5	1.1	0.15	FE6862TS	5.8	1.096	437	33	8	1.984
6	15	17	5	1.2	0.2	FE6962TS	5.8	1.186	505	31	9	1.984
6	19	22	6	1.5	0.3	FE6262TS	6.8	2.522	1.057	28	8	3.175
7	14	16	5	1.1	0.15	FE6872TS	5.8	1.186	505	31	9	1.984
7	17	19	5	1.2	0.3	FE6972TS	5.8	1.795	776	28	9	2.5
7	19	22	6	1.5	0.3	FE6072TS	6.8	2.522	1.057	28	8	3.175
7	22	25	7	1.5	0.3	FE6272TS		3.369	1.363	27	7	3.969
8	16	18	6	1.3	0.2	FE6882TS	6.8	1.795	776	28	9	2.5
8	19	22	6	1.5	0.3	FE6982TS	6.8	1.798	797	27	9	2.5
8	22	25	7	1.5	0.3	FE6082TS		3.369	1.363	27	7	3.969
9	17	19	6	1.3	0.2	FE6892TS	6.8	1.798	797	27	9	2.5
10	19	21	7	1.5	0.3	FE68002TS	7.8	1.922	915	25	10	2.5

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2TS SEAL EXTENDED INNER RING BALL BEARINGS

Inch Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	Flanged Ext Inner Ring 2TS Seal Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
0.078	0.25	0.296	0.141	0.031	0.003	FE5/64-2TS	0.1719	286	90	65	7	0.0394
0.094	0.313	0.359	0.141	0.031	0.005	FE3/32-2TS	0.1719	644	215	51	7	0.0625
0.125	0.25	0.296	0.109	0.031	0.003	FE3175-2TS	0.1406	292	97	53	7	0.0394
0.125	0.313	0.359	0.141	0.031	0.003	FE1/8A-2TS	0.1719	644	215	51	7	0.0625
0.125	0.375	0.422	0.141	0.031	0.003	FE1/8A/6-2TS	0.1719	644	215	51	7	0.0625
0.125	0.375	0.44	0.156	0.03	0.012	FE1/8B-2TS	0.1875	720	260	44	8	0.0625
0.156	0.313	0.359	0.125	0.036	0.003	FE3967-2TS	0.1562	391	165	42	11	0.0394
0.188	0.313	0.359	0.125	0.036	0.003	FE4763A-2TS	0.1562	391	165	42	11	0.0394
0.188	0.375	0.422	0.125	0.031	0.003	FE4763B-2TS	0.1562	730	271	41	8	0.0625
0.188	0.5	0.565	0.196	0.042	0.012	FE3/16-2TS	0.2272	1.339	488	37	7	0.0938
0.188	0.5	0.565	0.196	0.042	0.012	FE3/16-2RS	0.2272	1.339	488	28	7	0.0938
0.25	0.375	0.422	0.125	0.036	0.003	FE6350A-2TS	0.1562	391	165	35	11	0.0394
0.25	0.5	0.547	0.188	0.045	0.005	FE6350B-2TS	0.2188	730	271	33	8	0.0781
0.25	0.625	0.69	0.196	0.042	0.012	FE1/4A-2TS	0.2272	1.651	670	31	8	0.0984
0.313	0.5	0.547	0.156	0.031	0.005	FE7938-2TS	0.1875	539	279	30	12	0.0469

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

GRW DEEP GROOVE 2RS SEAL BALL BEARINGS

Metric Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	2RS Seal Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
4	13	15	5	1	0.2	6242RS	5.8	1.339	488	28	7	2.381
4	16	18	5	1	0.3	634D2RS		1.935	677	26	6	3.175
5	16		5		0.3	625D2RS		1.935	677	26	6	3.175
5	19	22	6	1.5	0.3	6352RS	6.8	2.522	1.057	22	8	3.175
6	19	22	6	1.5	0.3	6262RS	6.8	2.522	1.057	22	8	3.175
7	19	22	6	1.5	0.3	6072RS	6.8	2.522	1.057	22	8	3.175
7	22	25	7	1.5	0.3	6272RS		3.369	1.363	21	7	3.969
8	22	25	7	1.5	0.3	6082RS		3.369	1.363	21	7	3.969
9	24		7		0.3	6092RS		3.435	1.43	20	7	3.969
9	24		7		0.3	609D2RS		3.758	1.632	20	8	3.969
9	26		8		0.3	6292RS		4.698	1.982	19	7	4.763
10	26		8		0.3	60002RS		4.698	1.982	19	7	4.763
10	30		9		0.6	62002RS		6.1	2.6	18	7	5.556
10	30		9		0.6	6200D2RS		5.236	2.374	18	8	4.763
12	21		5		0.3	68012RS		1.93	900	19	12	2.381
12	24		6		0.3	69012RS		2.971	1.452	19	10	3.175
12	28		8		0.3	60012RS		5.237	2.359	31	9	3.969
12	32		10		0.6	62012RS		7.073	3.1	18	7	6
15	24		5		0.3	68022RS		2.08	1.1	18	14	2.381
15	28		7		0.3	69022RS		4.445	2.268	18	11	3.175
15	32		9		0.3	60022RS		5.676	2.819	17	9	4.763
15	35		11		0.6	62022RS		7.939	3.744	17	8	6
17	26		5		0.3	68032RS		2.24	1.27	17	16	2.381
17	30		7		0.3	69032RS		4.723	2.547	17	11	3.969
17	35		10		0.3	60032RS		6.172	3.267	17	10	4.763
17	40		12		0.6	62032RS		9.811	4.734	16	8	6.747

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2RS SEAL & FLANGE SEAL BALL BEARINGS

Inch Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	2RS Seal & 2RS Flange Seal Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
0.188	0.5	0.565	0.196	0.042	0.012	3/16-2RS	0.2272	1.339	488	28	7	0.0938
0.25	0.625	0.69	0.196	0.042	0.012	1/4A-2RS	0.2272	1.651	670	24	8	0.0984
0.25	0.75		0.281		0.016	1/4-2RS		2.522	1.057	22	8	0.125
0.375	0.875	0.969	0.218	0.062	0.016	3/8-2RS		2.555	1.129	21	8	0.125
0.188	0.5	0.565	0.196	0.042	0.012	F3/16-2RS	0.2272	1.339	488	28	7	0.0938

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2RS SEAL FLANGE BALL BEARINGS

Metric Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	Ext Inner Ring 2TS Seal Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
4	13	15	5	1	0.2	E6242RS	5.8	1.339	488	28	7	2.381
7	22	25	7	1.5	0.3	E6272RS		3.369	1.363	21	7	3.969
8	22	25	7	1.5	0.3	E6082RS		3.369	1.363	21	7	3.969

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2RS SEAL & FLANGE SEAL BALL BEARINGS

Inch Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	2RS Seal & 2RS Flange Seal Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
0.188	0.5	0.565	0.196	0.042	0.012	3/16-2RS	0.2272	1.339	488	28	7	0.0938
0.25	0.625	0.69	0.196	0.042	0.012	1/4A-2RS	0.2272	1.651	670	24	8	0.0984
0.25	0.75		0.281		0.016	1/4-2RS		2.522	1.057	22	8	0.125
0.375	0.875	0.969	0.218	0.062	0.016	3/8-2RS		2.555	1.129	21	8	0.125
0.188	0.5	0.565	0.196	0.042	0.012	F3/16-2RS	0.2272	1.339	488	28	7	0.0938

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2RS SEAL EXTENDED INNER RING BALL BEARINGS

Metric Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	Ext Inner Ring 2TS Seal Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
4	13	15	5	1	0.2	E6242RS	5.8	1.339	488	28	7	2.381
7	22	25	7	1.5	0.3	E6272RS		3.369	1.363	21	7	3.969
8	22	25	7	1.5	0.3	E6082RS		3.369	1.363	21	7	3.969

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2RS SEAL & FLANGE SEAL BALL BEARINGS

Inch Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	Std & Flange Ext Inner Ring 2RS Seal Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
0.188	0.5	0.565	0.196	0.042	0.012	E3/16-2RS	0.2272	1.339	488	28	7	0.0938
0.188	0.5	0.565	0.196	0.042	0.012	FE3/16-2RS	0.2272	1.339	488	28	7	0.0938

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2RS SEAL FLANGE EXTENDED INNER RING BALL BEARINGS

Metric Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	Ext Inner Ring 2TS Seal Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
4	13	15	5	1	0.2	E6242RS	5.8	1.339	488	28	7	2.381
7	22	25	7	1.5	0.3	E6272RS		3.369	1.363	21	7	3.969
8	22	25	7	1.5	0.3	E6082RS		3.369	1.363	21	7	3.969

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

DEEP GROOVE 2RS SEAL & FLANGE SEAL BALL BEARINGS

Inch Series

Bore Ø (d)	Outer Ø (D)	Flange Ø (FD)	Open Width (B)	Open Flange Width (FB)	Radius (rs – min) (2)	Std & Flange Ext Inner Ring 2RS Seal Part No	Shield Width (B1)	Load Rating Cr (N)	Load Rating Cor (N)	Limiting Speed (6) Nur (x 1000 rpm)	Ball Comple ment Qty.: Z (5)	Ball Comple ment Size: Dw
0.188	0.5	0.565	0.196	0.042	0.012	E3/16-2RS	0.2272	1.339	488	28	7	0.0938
0.188	0.5	0.565	0.196	0.042	0.012	FE3/16-2RS	0.2272	1.339	488	28	7	0.0938

Ball bearings without closure may be supplied with recesses. Please advise if you require bearings without recesses.
r_s min = minimum single bearing chamfer or maximum shaft or housing fillet radius.
Not applicable to bearings with extended inner ring.
Not applicable to flanged bearings.
The number of balls may vary due to different types of retainer.
See ‘Limiting Speeds’.
Tolerance of bore +12µm to +3µm.
Available in different width with closure.

GRW Ball Bearings from a Leading UK Supplier

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Related products

GRW Bearings Catalogue

HIGH PRECISION BALL BEARINGS by GRW

Benefits of GRW High Precision Ball Bearings:

DEEP GROOVE ball bearings INDEX

GRW ACCESSORIES - Shims & Spring Washers

GRW Bearing Accessories

Shaft retaining rings

ACCESSORIES

GRW SPECIAL BEARINGS

Superduplex bearings

Extraduplex bearings

Tandem duplex bearings

Bearings with modified external design

Bearings with integrated shaft

Bearings with housing

SPINDLE/ANGULAR CONTACT BALL BEARINGS

GRW DUPLEX BEARINGS

EXPLANATION OF BASIC TERMS

Closure

Alignment

Retainer (Cage)

Combined Load

Ball Pockets

Raceway Profile

Roundness

Curvature

Angular Contact Bearing, non-separable

Angular Contact Bearing, separable

Quality Grade

Full Complement Bearing

CLOSURES

CALIBRATION OF BORE & OUTSIDE DIAMETER

GRW Bearings LUBRICANTS

Lubricating oils

Lubricating greases

Special treatment

Table 3: Lubricating Oils

Table 3: Lubricating Process

MATERIALS FOR RINGS & BALLS

RETAINERS/CAGE TYPES FOR MINIATURE BALL BEARINGS

THREE TYPES OF DUPLEX ASSEMBLY FOR RADIAL BALL BEARINGS

FITTING

HIGH PRECISION BALL BEARING HANDLING & FAILURE ANALYSIS

Bearing MISALIGNMENT

MOUNTING OF BEARINGS

SHAFT & HOUSING SHOULDERS

GRW Bearing TOLERANCES

GRW BEARINGs CAPACITIES

ELASTIC BEHAVIOUR OF DEEP GROVE BALL BEARING

GRW Bearings FUNCTIONAL TESTS

Noise test

Torque test

Assembly of low torque bearings

FATIGUE LIFE

GRW Bearings LIMITING SPEEDS