The wheel hub bearing is one of the key components of the automobile. Its main function is to carry the weight and provide accurate guidance for the rotation of the wheel hub, which requires it to bear not only the axial load, but also the radial load.

 Wheel hub bearings are mainly divided into double row angular contact bearings, bearing units combined with anti-lock brake system ABS (that is, common wheel hub bearing repair kits) and wheel hub bearing units.