The double row ball slewing bearing has three races. Steel balls and spacer blocks can be directly discharged into the upper and lower raceways. Arrange two rows of steel balls with different diameters according to the force. This open assembly is very convenient. The upper and lower arc raceway bearing angles are both 90°, which can bear large axial force and overturning moment. When the radial force is greater than 0.1 times the axial force, the raceway must be specially designed.

The axial and radial dimensions of the double-row ball slewing bearing are relatively large and the structure is compact. Especially suitable for tower cranes, truck cranes and other loading and unloading machines that require medium or larger diameters. Products are divided into three types: no teeth (020), external teeth (021.002) and internal teeth (023.024). The slewing bearing with compact structure and large axial and radial dimensions is also a kind of slewing bearing for loading and unloading machinery. In addition, it is a toothless, internal and external tooth slewing bearing.