The double volleyball slewing ring has three seat rings. The steel ball and the isolating block can be directly discharged into the upper and lower raceways. According to the stress conditions, two rows of steel balls with different diameters are arranged. This kind of open assembly is very convenient. The bearing angles of the upper and lower arc raceways are all 90 °, which can bear large axial force and overturning moment. When the radial force is greater than 0.1 times of the axial force, the raceway must be specially designed. The axial and radial dimensions of double row reducing ball slewing bearing are relatively large, and the structure is tight. It is especially suitable for tower crane, truck crane and other loading and unloading machinery with medium or above diameter.

Note:

1. N1 is the number of lubricating oil holes. Oil cup M10 × 1 JB / t7940.1 ~ JB / t7940.2. You can specify the location of the oil hole according to the application.

2. N - φ can be changed into threaded hole, thread diameter m, thread depth 2m.

3. The circumferential force of the gear in the table is the maximum circumferential force, and the rated circumferential force is 1 / 2 of it

4. "K" is the cutting coefficient.