angle the ball bearing angular contact ball bearings can bear radial load and axial load can withstand pure axial load, can work at higher speeds. Single row angular contact ball bearings can withstand axial load in one direction. In the radial load, will cause additional axial force, and the shaft or housing can limit the axial displacement in one direction. If installed in pairs so that one pair of bearing outer ring face the same relative, and the wide-side end face of wide, narrow side facing narrow end, both to avoid additional axial force, but also the direction of the axis or in the case of two limit within the axial clearance. Angular contact ball bearings mounted ball bearings deep groove ball more than the number, so load capacity of the largest in the ball bearings, rigid too strong, stable operation. Can be used to adjust the displacement between inner and outer radial clearance.