Tapered roller bearing is separable bearing with tapered raceway for the inner & outer ring, meanwhile its roller is also tapered. Such kind of bearing can bear radial load, one-way axial load and combined axial & radial load. Larger the contact angle, greater the axial load capacity to withstand. The inner component and outer ring of tapered roller bearing can be separated, which should ensure that the inner hole of bearing and bearing housing has good concentricity when installation, otherwise, it will affect bearing’s service life.