The outer spherical bearing is actually a variant of the deep groove ball bearing, which is characterized in that the outer diameter of the outer ring surface is spherical, and can be fitted into the corresponding concave spherical surface of the bearing seat to serve as a centering function. It is mainly used to bear radial and axial combined loads mainly based on radial load. Generally, it is not suitable to bear axial load alone. Such bearings can be installed with inner ring (with full set of rollers and retainers) and outer ring belt. Move the screw. Bearing with cylindrical seat (with set screw) with slider seat.