SCHNORR LOAD WASHERS
HEAVY DUTY LOAD WASHERS ‘HDS’
Have been specially developed for high strength bolts of grades 8.8 to 12.9.
HEAVY DUTY LOAD WASHERS 'HDS'
The HDS washers have been specifically developed for high-strength bolts in the strength classes 8.8 –10.9 as per DIN ISO 898 Part 1 (SAE Grade 5). The loads of the washers have been matched to these bolts and are 70 to 90% of the bolt load in the flat state.
These high loads naturally require large cross-sections, which is why the outside diameter of the load washer is considerably larger than that of the Schnorr serrated safety washer. As a result, the area required for a design with load washers cannot be ignored.
As a highly progressive load increase occurs at the end of the spring deflection when the washer is flattened, the load has been indicated as double the calculated value in the following table. Tests are shown that these values are comparable with the measured values.
Explanations of the table:
Technical requirements: | According to DIN 267, Part 26 |
Material grades: | Spring steel according to DIN EN 10132-4, other materials on request |
Available surfaces: | Hardened, blank and oiled; mechanically galvanized; other materials on request. |
Article No: | Applies to the normal version made of spring steel |
h max: | Maximum dimension in delivery condition |
h min: | Minimum dimension after setting test according to DIN 267, Part 26 |
Contact force: | contact forces for the setting test according to DIN 267, Part 26 |
Minimum residual spring load: | Spring load, which rests after load with the contact pressure according to DIN 267, Part 2 and subsequent relieving of 100mm |
Dimension table for ’HDS’ load washers according to DIN 6796 material C60 S (1.211)
Article No./ Order Ref. | Finish | Nominal Size | Ordering Dimensions | Contact Force | Minimum residual spring load | ||||
mm | d1 mm | d2 mm | s mm | hmax mm | hmin mm | F N | F N | ||
700000 702110 | Blank, oiled Zn12M+passivation | 2 | 2.2 | 5 | 0.4 | 0.5 | 0.60 | * | * |
700100 702120 | Blank, oiled Zn12M+passivation | 2.5 | 2.7 | 6 | 0.5 | 0.6 | 0.72 | * | * |
700200 702130 | Blank, oiled Zn12M+passivation | 3 | 3.2 | 7 | 0.6 | 0.7 | 0.85 | * | * |
700300 702140 | Blank, oiled Zn12M+passivation | 3.5 | 3.7 | 8 | 0.8 | 0.9 | 1.06 | * | * |
700400 702150 | Blank, oiled Zn12M+passivation | 4 | 4.3 | 9 | 1.0 | 1.1 | 1.30 | 4400 | 1400 |
700500 702160 | Blank, oiled Zn12M+passivation | 5 | 5.3 | 11 | 1.2 | 1.3 | 1.55 | 7200 | 2300 |
700600 702170 | Blank, oiled Zn12M+passivation | 6 | 6.4 | 14 | 1.5 | 1.7 | 2.00 | 10200 | 4200 |
700700 702180 | Blank, oiled Zn12M+passivation | 7 | 7.4 | 17 | 1.75 | 2.0 | 2.30 | 14800 | 6200 |
700800 702190 | Blank, oiled Zn12M+passivation | 8 | 8.4 | 18 | 2.0 | 2.2 | 2.60 | 18600 | 7700 |
700900 702200 | Blank, oiled Zn12M+passivation | 10 | 10.5 | 23 | 2.5 | 2.8 | 3.20 | 29600 | 12400 |
701000 702210 | Blank, oiled Zn12M+passivation | 12 | 13.0 | 29 | 3.0 | 3.4 | 3.95 | 43000 | 18000 |
701100 702220 | Blank, oiled Zn12M+passivation | 14 | 15.0 | 35 | 3.5 | 4.0 | 4.65 | 59100 | 25000 |
701200 702230 | Blank, oiled Zn12M+passivation | 16 | 17.0 | 39 | 4.0 | 4.6 | 5.25 | 80900 | 34000 |
701300 702240 | Blank, oiled Zn12M+passivation | 18 | 19.0 | 42 | 4.5 | 5.1 | 5.80 | 102000 | 57000 |
701400 702250 | Blank, oiled Zn12M+passivation | 20 | 21.0 | 45 | 5.0 | 5.6 | 6.40 | 130000 | 73000 |
701500 702260 | Blank, oiled Zn12M+passivation | 22 | 23.0 | 49 | 5.5 | 6.1 | 7.05 | 162000 | 91000 |
701600 702270 | Blank, oiled Zn12M+passivation | 24 | 25.0 | 56 | 6.0 | 6.8 | 7.75 | 188000 | 122000 |
701700 702280 | Blank, oiled Zn12M+passivation | 27 | 28.0 | 60 | 6.5 | 7.3 | 8.35 | 246000 | 161000 |
701800 702290 | Blank, oiled Zn12M+passivation | 30 | 31.0 | 70 | 7.0 | 8.0 | 9.20 | 300000 | 196000 |
* dimensions not listed in DIN 267, Part 2
Load washers according to DIN 6796 in different finish and material are available on request.
