Joint bearings is mainly composed of a spherical outside of the inner ring and outer ring composition of an inner sphere, according to its type and structure of the different, can bear radial load and axial load or the axial and radial combined load role. Such bearing has greater load capacity and impact resistance ability, and have KangFuXing, wearability, self-aligning, lubrication good or self-lubricating prevent dirt characteristics, are generally used to speed the lower swing motion, tilt movement and rotation movement. At present the product is widely used in metallurgical caster, rolling just equipment, mining machinery, mould, lifting machinery, textile machinery, wind power generation, Marine, turbine, turbine, the injection molding machine and equipment production line.