Slewing bearing is a kind of special structure large bearing, include rotating, transmission, fixed and other functions, and it can under high axial load, radial load and overturning moment load at the same time. Under normal circumstances, the slewing bearing itself both with teeth, mounting holes, lubricants holes and sealing devices to meet the requirement of variety of working conditions; on the other hand, slewing bearing has a characteristic of compact structure, easy to guide rotating, convenient installation and easy to maintain, widely used in lifting and transport machinery, mining machines,construction machinery, port machinery, wind power generation, medical equipment, radar, missile launchers and other large rotary devices. 

UWE slewing bearing depending on the structures are divided into four point contact ball slewing bearing, double-row different diameter ball slewing bearing, crossed roller slewing bearing, triple-row roller slewing bearing, yaw, pitch system and different structural forms of slewingmbearing, according to the requirements of the host transmission machine is divided into internal tooth, external tooth and no teeth structural forms. According to different structure characteristics, slewing bearing can meet the requirement of different host.