... ,3,5 5. Z2V2, Z3V3,Z4V4 The purpose of a ball bearing is to reduce rotational friction and support radial and axial ... .g., a hub or shaft). .Ball bearings tend to have lower load capacity for their size than other kinds of rolling-element ... , motors, medical devices, motorbikes, textile machines, autos and other areas. deep groove ball bearingWe have Open, Z, ZZ, RS, 2RS,RZ, 2RZ.N ...