... 6315 Bearing Deep groove ball bearingFeatures: Shield / closure: open ball bearing, Z, ZZ, RS, 2RS,2RZ Ball bearings snap ring: N ... V3, V2, V1 Internal clearance codes: C2, C3, C4, C5 Ball bearings material: AISI52100, AISI440C, AISI304, AISI316, ceramic Retainer: PTFE, ... stainless steel Hardness for rings and balls: 59 - 63HRC Ball bearings bore size: 1 - 200mmVersions: Ball bearings with one or two ...