1. The working principle of the bearing is to replace sliding friction with rolling friction;

2. Due to the different working conditions of various machines, various requirements are put forward for rolling bearings in terms of load capacity, structure and performance. Therefore, rolling bearings need to have various structures;

3. Bearings are usually evenly arranged between the two rings for rolling motion with the help of cages. Its shape, size and quantity directly affect the load capacity and performance of the bearings. In addition to the cages can evenly separate the rolling elements , It can also play a role in guiding the rotation of the rolling elements and improving the internal lubrication performance of the bearing.