Thrust roller bearings used to carry axial load primarily axial and radial load combination, but radial load may not exceed 55% of the axial load. Compared with other thrust roller bearings, these bearings friction factor is lower, high speed, and has the spherical performance. 29000 type bearings stick for the unsymmetrical spherical roller, can reduce roller and groove in the work relative sliding, and roller long, large in diameter, and roller number, load capacity, high, usually by oil lubrication, individual situation grease lubrication available at low speed. In the design selection, should first choose;
