The optimized raceway makes the bearing have less friction, and it is easier to ensure the integrity of the surface, and the optimized lubrication effect. The new design of the cage makes the new bearing have higher stability and lower noise, which is suitable for relatively high rotation speed and has lower shock sensitivity. The optimization method of the sealing scheme, adopting the new stepped sealing lip, the friction torque is obviously reduced, the heat generated is obviously reduced, and the effect is more obvious at higher speeds. Optimized sealing performance: longer service life and higher rotation speed of bearings.