... Internal elimination code: C0, C2, C3, C4, C57. Bearing material: bearing steel (9Cr18), stainless steel(AISI440C, AISI304, AISI316), ceramics8. ... Keeper: stainless steel, PTFE, nylon9. Bearing ferrule and ball hardness: 59 - 63HRCExplanation:Z represents that ... but also bear certain axial load. When the bearing radial clearance increased when the function with angular contact ...