The self-aligning ball bearing has two structures: cylindrical hole and conical hole. The material of the cage is steel plate, synthetic resin, etc. It can bear large radial load, and also can bear certain axial load, adapting to the operating temperature-30 ℃ To + 120 ℃. The main application of self-aligning ball bearings: precision instruments, low-noise motors, automobiles, motorcycles and general machinery, etc. It is the most widely used type of bearing in the mechanical industry.