Joint bearings are a type of spherical sliding bearings, with sliding contact surfaces consisting of an inner spherical surface and an outer spherical surface. They can rotate and swing at any angle during movement. They are made using various special processing methods such as surface phosphating, blasting, pad insertion, and spraying.

The spherical sliding contact area of joint bearings is large, the inclination angle is large, and they have large load capacity and impact resistance. They also have the characteristics of corrosion resistance, wear resistance, self-aligning, smooth or self smooth without smooth dirt purification. Even if the device is misaligned, it can still operate normally. Therefore, joint bearings are commonly used for lower speed swing, tilt, and rotational movements.