The main function of wheel hub bearings is to bear weight and provide precise guidance for the rotation of the wheel hub. They bear both axial and radial loads and are a very important component. The hub bearing unit is developed on the basis of standard angular contact ball bearings and tapered roller bearings. It integrates two sets of bearings and has advantages such as good assembly performance, negligible clearance adjustment, light weight, compact structure, large load capacity, the ability to pre load lubricating grease for sealed bearings, omission of external hub seals, and freedom from maintenance. It has been widely used in cars and is gradually expanding its application in heavy-duty vehicles.
