Structural design: It is a double-row combined bearing, consisting of an inner ring, an outer ring, double-row rollers and a cage. This structure enables it to withstand large radial loads and certain axial loads at the same time, and is suitable for complex stress conditions in the wheel hub of an automobile.

Rolling element and raceway: The rolling element is made of high-carbon chromium bearing steel (fully hardened GCr15), which has high strength, high hardness and good wear resistance, can withstand heavy loads and ensure long-term stable operation. The raceway is a convex raceway, which can improve the contact stress distribution between the roller and the raceway, reduce edge stress concentration, and improve the bearing capacity and service life.