Slewing bearing, also called slewing ring bearing, is widely used in real industry.Known as: "The Joint of the Machine"It is a large bearing that can bear comprehensive loads, and can bear large axial, radial loads and overturning moments at the same time.Slewing ring bearings generally have mounting holes, internal or external gears, lubricating oil holes and sealing devices, so that the design of the main engine can be compact, easy to guide, and easy to maintain.