Thrust ball bearing，also known as tbb bearing, is one of the rotary ball bearings. It owns the same features of other ball bearings, i.e permitting rotation among the parts.Thrust ball bearing is composed by housing ring, shaft ring, cage and balls. ZZ Bearings manufacture tbb bearings for different applications, especially in steel making, mining and cement industry. The ring match with the shaft is called shaft ring and the one matched with the housing is called housing ring. Those parts are separable and assembled on the shaft while in application.This kind of bearing can only bear axial load not subjected to any radial load. If in high speed application, oil lubrication is a must.