... :Z1,Z2,Z3,Z4 Stainless steel miniature deep groove ball bearings1.Model:Open,Z,2Z,RS,2RS ... Z4Vibration level:V1,V2,V3,V4Hardness of the bearing:HRC59-6ApplicationAutomotive,Office equipment,Electric applicance,Electronics ... as “open”,”shielded”,”sealed”.(1) Single-row deep groove ball bearingsThey can sustain radial loads mainly and ... .Welcome to inquiry . Stainless steel deep groove ball bearing