we can supply SLEWING RINGS BEARINGS Here are brief introduction of our company: Our total mainly produces and sales more than 3,000 varieties of rolling bearing, nonstandard bearing, and special structure bearing with outside diameter from 40mm to 2,250mm. Our factory has many engineers from ZWZ factory or SKF The single-row four-point contact ball type slewing bearing is composed of 2 seat-rings. It features compact in design and light in weight. The balls contact with the circular race at for points, via which the axial force, radial force and tipping mo