Slewing ring, also known as slewing bearings or turntable bearing, is a sizable bearing which will be able 
to maintain the more axial load, radial load and tilting moment. It is known as: “machine joints”, the fundamental machinery transmitting parts, between your two objects that need to be relative rotary motion. It has the inner and outer ring, rolling and other components.
You can consider the slewing drive as a worm gear slew drive gearbox since the core motion components will be the slewing bearing and worm shaft. It also consists of auxiliary components such as seals, housing, and motor. As a power resource, slew motor is usually DC planetary gear electric motor or AC gear engine. AC hydraulic engine is mainly used in the building machinery as a power travel system. As the core component is slewing ring travel, slewing gearbox can readily withstand the axial and radial forces. The slew drive working basic principle: The worm is driven by the electric motor, which drives the external ring of the slewing band to rotate; The outer ring result the torque through the flange and the inner band of the slewing ring is fixed in the housing.
Slewing drive has reverse self-locking due to worm gear drive with reverse self-locking features. This feature greatly enhances the balance of the web host operating and safety aspect. Compared to the traditional swing products, slewing travel gearbox is simple to install, simple to maintain, and saves considerable installation space.