It is mainly composed of an inner ring with an outer spherical surface and an outer ring with an inner spherical surface, which can bear larger loads and radial load, axial load or combined load of radial and axialaccording to the different types and structures of oil cylinder earring joint bearings, . Cylinder earring joint bearings are generally used for low-speed swing movements, and can also be tilted within a certain angle range. According to its different types and structure, bear radial load, axial load or combined load of radial and axial,and are widely used in engineering hydraulic cylinders, forging machine tools, engineering machinery, automation equipment, automotive shock absorbers, water conservancy machinery and other industries.