Thrust ball bearings are composed of a shaft ring, seat ring, steel ball, and cage, and the shaft with the collar is called the shaft ring, the shell with the collar is called the seat ring, seat ring of the mounting surface is spherical bearing with spherical performance, can reduce the impact of installation errors. Thrust ball bearing is mainly used to bear axial load, can transmit large axial load, and can not bear radial load. Such bearings are mainly used in automobile steering mechanisms, machine tool spindles, etc.