Ball Bearing 6800 61800 series 1.Precision grade P0-P4 2.Silience working ZV3, ZV4 3. ... control Ball bearings features,for detailed technical data,please download IXIN pdf catalog:1) Shield / Seals: Open bearing, Z, ZZ, RS, 2RS2 ... ) Tolerance codes: ABEC-1, ABEC-3, ABEC-53) Vibration Value: V4, V3, V2, V14 ...