... 5. Z2V2, Z3V3,Z4V4 The purpose of a ball bearing is to reduce rotational friction and support ... assembly (e.g., a hub or shaft). .Ball bearings tend to have lower load capacity for their ... bearings due to the smaller contact area between the balls and races. However, they can tolerate some ... motorbikes, textile machines, autos and other areas. deep groove ball bearingWe have Open, Z, ZZ, RS, 2RS,RZ, ...