1. The toothless single-row slewing bearing is composed of an outer gear inner ring and an inner gear outer ring with the same main diameter in the raceway, and the plugging and oil hole are arranged on the outer ring.

2. The center diameter series of the raceway of the cross roller slewing bearing is the same as that of the single row slewing bearing, but the diameter of the rolling body of the cross roller slewing bearing with the same center diameter of the raceway is different from that of the single volleyball slewing bearing, corresponding to the following:

Standard slewing bearing numbering method: