The structure of the joint bearing is simpler than that of the rolling bearing, which is mainly composed of an inner ring with an outer sphere and an outer ring with an inner sphere. Joint bearings are generally used for low speed swing motion (that is, angular motion), because the sliding surface is spherical, it can also be tilted in a certain Angle range (that is, centering motion), when the concentricity of the supporting shaft and shaft shell hole is large, it can still work normally.
Joint bearings can withstand large loads. According to its different type and structure, it can bear radial load, axial load or radial and axial combined load. Because the outer sphere of the inner ring is inlaid with composite material, the bearing can produce self-lubrication in operation. Generally used for low speed swing motion, and low speed rotation, but also in a certain Angle range of tilt motion, when the supporting shaft and shaft shell hole concentricity is large, can still work normally. Self-lubricating joint bearings are used in water conservancy, professional machinery and other industries.