Tapered roller bearing can be separated by an inner ring with roller and cage components and outer ring can taper roller bearing installed respectively. Roller and raceway contact point correction of contact wires can reduce the stress concentration. Tapered roller bearings can withstand radial load and axial load. Because of the tapered roller bearings can only transfer one-way axial load, therefore, to pass in the opposite direction of axial load will need to another and the installation of the symmetry of tapered roller bearings.