6315 Deep groove ball bearing 1 Good quality,nice price 2 low vibration,low friction 3 low noise, high speed 4 good service FAG SKF NSK NTN KOYO 6315 Bearing Deep groove ball bearingFeatures: Shield / closure: open ball bearing, Z, ZZ, RS, 2RS,2RZ Ball bearings snap ring: N, NR Tolerance codes: ABEC-1, ABEC-3, ABEC-5, ABEC-7 Vibration level codes: V4, V3, V2, V1 Internal clearance codes: C2, C3, ...