Bearings are commonly applied in our daily life. It is obvious that there is a wide range of types. Some kinds of bearings are very popular in industries, while the slewing bearings may be not quite commonly known to people.
Slewing ring bearings are ball or cylindrical roller bearings that can accommodate axial, radial and moment loads acting either singly or in combination and in any direction. They are not mounted in a housing or on a shaft, but directly to a seating surface. The inner and outer ring are supplied with mounting holes. Both rings may have integral gears. They are often made with gear teeth integral with the inner or outer race, used to drive the platform relative to the base. Besides, they are also referred to as slewing rings bearings which can perform slewing as well as rotating movements. They may be used without gears or with internal or external gears.
