Tapered roller bearings refer to radial thrust rolling bearings with tapered rollers. There are two types: small cone angle and large cone angle. The small cone angle mainly bears the combined radial and axial load, which is mainly the radial load. It is often used in double and reverse installation. The inner and outer races can be installed separately. The radial and axial clearance can be adjusted during installation and use; The large taper angle mainly bears the combined axial and radial load based on the axial load. Generally, it is not used alone to bear the pure axial load, but can be used to bear the pure radial load when configured in pairs (the ends of the same name are installed relative to each other).