Joint bearings are widely used in engineering hydraulic cylinders, forging machine tools, engineering machinery, automation equipment, automotive shock absorbers, hydraulic machinery and other industries. Joint bearing introduction and classification of spherical plain bearings, the basic type is composed of spherical sliding spherical contact surface The inner and outer rings are composed. Depending on its structure and type, it can withstand radial loads, axial loads, or combined loads acting in both radial and axial directions. Because the spherical sliding contact area of the joint bearing is large, the inclination angle is large, and because most of the joint bearings adopt special processing methods, such as surface phosphating, galvanizing, chrome plating or outer sliding surface lining, inserting, spraying and the like. Therefore, it has large load capacity and impact resistance, and has the characteristics of corrosion resistance, wear resistance, self-aligning, good lubrication or self-lubricating and non-lubricating dirt pollution, even if the installation is misplaced, it can work normally. Therefore, joint bearings are widely used for low-speed oscillating motions, tilting motions, and rotational motions. GE180ES articulated bearings, such as SB, CF, GE, etc., as well as a number and other types of radial spherical plain bearings, rod end joint bearings, etc.