Made with AISI 52100 bearing steel (also known as GCR-15 or 100CR6) It is heat hardened to Rc 59-64 prior to final grinding and polishing, giving it excellent wear resistance and long life.
| Weight | 0.04 oz |
|---|---|
| Id | 4mm |
| Od | 9mm |
| Th | 4mm |
| Enclosure | Metal Shields |
| Ball mtl | Bearing Steel |
| Race mtl | Bearing Steel |
| Retainer mtl | Metallic |
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