Tapered roller bearings can be separated from the inner ring and roller, cage and outer ring with the composition of the components can be installed. Roller and raceway contact points of the contact line can be modified to reduce stress concentration, can withstand large radial loads and axial loads. The tapered roller bearing axial load can only pass one way, so as to pass in the opposite direction of the axial load will need to install another with symmetrical tapered roller bearings. Tapered roller bearings are widely used in automotive, mill, mining, metallurgy, plastics and machinery.