... is similar to the 6900 series. These bearings have a slightly larger outside diameter than the 6900 series, ... C2, C0, C3 and C4 fits. Lubricated with a good grease, the sealed bearings can have better operational ... Z, ZZ, RS, 2RS, 2RZ Ball bearings snap ring: N, NR Tolerance: ABEC-1, ABEC-3, ABEC-5Vibration level: ... Z and ZZ (2Z) With a snap ring groove in outer ring N With a snap ring groove in outer ...