Bearings in automotive applications include: wipers, shock absorbers, seats, gearboxes, brakes, steering, folding convertible roofs, interiors, struts, control rods, pedals, and other applications; steering systems: steering support seats, steering columns, steering oil pumps; transmission systems: rear output shaft, spindle, reverse shaft, clutch, pump, solenoid valve, planetary gear set, fork seat, seat adjuster, height adjustment mechanism and seat frame shaft, drive train, pivot pin brake system hinges, door hinges, trunk, hood hinges, automatic door closing device engine management, water pump and oil pump, tensioning wheel, etc.

At present, most of the wheel bearings used in passenger cars use sealed double-row angular contact bearings. The bearings are filled with grease to ensure the lifetime lubrication requirements of the bearings. The grease is sealed inside the bearings through oil seals.

If this type of car wheel hub bearing is damaged during driving, it can be replaced directly without any maintenance, so it can be said that this type of wheel bearing is maintenance-free.

Automotive hub bearings have now been developed to the third generation: the first generation is composed of double row angular contact bearings. The second generation has a flange on the outer raceway for fixing the bearings, which can be simply fixed on the axle with nuts. Make car maintenance easier. The third generation of hub bearing units use the matching of bearing units with ABS.

Many hub bearings are sealed, and this type of bearing does not require lubrication throughout its service life. Other bearings that are not sealed, such as double-row tapered roller bearings, must be lubricated with grease during installation. Due to the different dimensions of the bearing cavity, it is difficult to determine how much grease to add. The most important thing is to ensure that there is grease in the bearing. If there is too much grease, excess grease will seep out as the bearing rotates.