Wheel Bearings are used in automotive axle for bearing load and providing accurate guidance of the wheel rotation. It can bear axial and radial load, and it is becoming important part in carload and rotation. The product has good assembly performance, light weight, compact structure and large load capacity. In addition to that, it can omit the clearance adjustment and the external wheel sealing. Currently, wheel bearing is widely used in the cars and trucks. Wheel bearing is responsible for lowering the friction of the chassis operation and maintaining the normal running of the automobile. If the wheel bearing breaks down, it may cause noises and heating phenomenon.