... , ABEC-7Vibration level codes: V4, V3, V2, V1Internal clearance codes: C2, C3, C4, C5Ball bearings material: AISI52100, AISI440C, AISI304, AISI316, ... snap ring NR.In different radial clearances C5, C4, C3, C2.Applications : Typical applications: electric motors, automotive applications, home appliances, ... manufactur 6200 6300 6400 series , u groove ball bearing , bearing skf 6406-2rs 6406 2rs 6406 rs