The single-row four point contact ball slewing ring is composed of 2 seat-rings. It features compact in design, and light in weight. The balls contact with the circular race at four points, via which the axial force, radial force and resultant moment may be born simultaneously. It may be used for slewing conveyers, welding arm and positioner, light, medium duty cranes, excavators and other engineering machines. The designs of single-row ball slewing bearing include with external gear, with internal gear and without gear.
