... ball bearings,flange ball bearings,self-aligning ball bearings.with less coefficient of friction, high limiting speed, ... , Z, ZZ, RS, 2RS,2RZBall bearings snap ring: N, NRTolerance codes: ABEC-1, ABEC-3, ABEC-5, ... - 200mm3.Versions: Ball bearings with one or two side rubber seal RS, 2RS.With one or two side metal ... shields Z and ZZ (2Z).With a snap ring groove in outer ring N.With a snap ring groove in ...