Spherical bearings are mainly sliding bearings with a special structure consisting of an inner ring with an outer spherical surface and an outer ring with an inner spherical surface. Can withstand larger loads. The structure of the spherical bearing is simpler than that of the rolling bearing. It is mainly composed of an inner ring with an outer spherical surface and an outer ring with an inner spherical surface. Spherical bearings are generally used for low-speed swing movements (i.e. angular movements). Since the sliding surface is spherical, they can also perform tilting movements within a certain angle range (i.e. aligning movements). When the support shaft and the shaft shell hole are not concentric When the temperature is large, it can still work normally. Spherical bearings can withstand larger loads. Depending on its type and structure, it can bear radial load, axial load or a combined load of both radial and axial directions. Since the outer spherical surface of the inner ring is inlaid with composite material, the bearing can produce self-lubrication during operation. It is generally used for low-speed swing motion and low-speed rotation. It can also perform tilting motion within a certain angle range. When the support shaft and the shaft housing hole are not concentrically large, it can still work normally. Self-lubricating spherical plain bearings are used in water conservancy, professional machinery and other industries. Spherical bearings are widely used in engineering hydraulic cylinders, forging machine tools, engineering machinery, automation equipment, automobile shock absorbers, water conservancy machinery and other industries. Spherical bearings are spherical sliding bearings. The basic type is composed of inner and outer rings with spherical sliding spherical contact surfaces. Depending on its structure and type, it can bear radial load, axial load, or combined load acting simultaneously in radial and axial directions. Because the spherical sliding contact area of spherical plain bearings is large and the inclination angle is large, and also because most spherical plain bearings adopt special processing methods, such as surface phosphating, galvanizing, chrome plating or outer sliding surface lining, padding, spraying, etc., Therefore, it has a large load capacity and impact resistance, and has the characteristics of corrosion resistance, wear resistance, self-aligning, good lubrication or self-lubricating without lubricating dirt pollution, and it can work normally even if the installation is misaligned. Therefore, spherical plain bearings are widely used for low-speed swing motions, tilting motions and rotational motions.