This ball slewing ring developed by Universal Industrial Products, Inc. are specifically for civil engineering, excavators and cranes. It has an outer diameter of 1,570 mm and it has a ball size of 3 in. This ball slewing ring is made from 42CrMo materials. Furthermore, it has an axial play of 0.0024-0.0071 inches and a radial play of 0.0031-0.0079 inches.