The tapered roller bearing belongs to the separated type bearing, and both the inner and outer rings of the bearing have tapered raceways. The inner ring and a group of tapered rollers are enveloped by a basket shaped cage to form an inner ring component. The outer ring can be separated from the inner ring component, and the outer ring and inner component can be interchanged and used interchangeably. The bearing is designed to adapt to combined loads, namely radial and axial loads acting simultaneously. The extension lines of the raceways intersect at the same point on the bearing axis, To achieve true rolling, it has low friction torque during operation. The axial load capacity of tapered roller bearings increases with the increase of contact angle. The size of the contact angle is related to the calculation coefficient, and the larger the value, the larger the contact angle.