What are the components of a truck bearing?

Truck bearings are mainly composed of the following components: inner ring, outer ring, rolling element, cage, middle spacer, sealing device, front cover and rear block and other accessories.

‌Inner ring‌: Located inside the bearing, it is used to support the rolling elements of the bearing and bear the radial load on the shaft. The inner diameter of the inner ring is equal to the diameter of the shaft, and is usually made of steel and cemented carbide materials.

‌Outer ring‌: Located outside the bearing, it is used to support the rolling elements of the bearing and bear the radial load on the shaft. The outer diameter of the outer ring is equal to the aperture of the bearing seat, and is generally made of steel or cast iron materials.

‌Rolling elements‌: Including steel balls, rollers or rollers, they roll between the inner and outer rings, bear the load from the truck, and reduce the friction between the shaft and the bearing. Commonly used materials are chrome steel and ceramic materials.

‌Cage‌: Used to fix rolling elements to prevent interference between them. Cages are usually made of steel plates, copper alloys or plastics, and factors such as bearing load, speed and temperature need to be considered during design.

‌Spacer ring‌: Used to separate rolling elements, ensuring they are evenly distributed, reducing friction and wear‌. ‌Seal device‌: Prevents dust and moisture from entering the bearing, keeping it clean and lubricated‌. ‌Front cover and rear guard‌: Provide additional support and protection to prevent foreign matter from entering the bearing‌. 

These components work together to ensure that truck bearings can withstand heavy loads, reduce friction, and maintain long-term stable operation.