What is the working principle of bearings？

The working principle of bearings is rolling friction instead of sliding friction; 2, because a variety of machinery has different working conditions, a variety of different requirements are put forward for rolling bearings in load capacity, structure and performance, therefore, rolling bearings need to have a variety of structures; 3. Bearings are usually evenly arranged between two rings for rolling movement with the help of cages, whose shape, size and quantity directly affect the bearing load capacity and performance. Cages can not only evenly separate rolling bodies, but also guide rolling bodies to rotate and improve bearing internal lubrication performance.