ABIS Miniature and Precision Ball Bearings
Closures
With bores of 0.6 to 90mm and precision grades to ABEC 7
General Information
Closures
A shield (non-contact) or seal (contact) is often installed to retain lubricant and to prevent contamination from entering the bearing raceways. These are available in a variety of materials and configurations.
ZZ Pressed Steel Shield | ZZS Steel Shield with Snap Ring | TTS Teflon Seal with Snap Ring | 2RS Contact Rubber Seal | 2RU Non-Contact Rubber Seal |
Non-contact shield pressed into outer ring. Very little grease leakage and low ingress of contaminants. | Non-contact shield retained in outer ring. Low ingress of contaminants. Mainly used for smaller or narrower bearings. | Teflon seal reinforced with glass fibre is retained in outer ring by snap ring. Low ingress of contaminants. Mainly used for smaller or narrower bearings. Seal can flex to accommodate internal pressure changes. TEFLON SEAL operating temperature range from –100 to +260oC. | Rubber seal fitted into outer ring. Light contact with inner ring, retains grease and prevents ingress of external contaminants. NBR SEAL operating temperature range from –40 to +120oC. FKM (VITON) SEAL operating temperature range from –30 to +230oC. | Non-contact rubber seal fitted into outer ring, still provides effective sealing. NBR SEAL operating temperature range from –40 to +120oC. FKM (VITON) SEAL operating temperature range from –30 to +230oC. |
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