The single row crossed roller bearing is composed of two seat rings, which design in compact structure and light weight; this single row crossed roller type siewing bearing has the steel roller for the rolling element, not for the steel ball. As the rollers are 1:1cross arranged, it is suitable for high precision mounting and capable to bear axial force, resultant moment and considerable large radial force. The axial and radial clearance is smaller than single row ball slewing bearing. The rotating is not so flexible as the one row ball bearings, usually it use for some higher precision applications.Our single row crossed roller slewing bearing ring's axial and radial clearance’s precision is high.Single row crossed roller ring bearings are mainly made of 50 Mn, 42CrMo and C45.The single-row crossed roller slewing ring is composed of two seat-rings.It features compact in design,light in weight,high precision and small fitting clearance.As the rollers are 1:1cross aranged,it is suitable for high precision mounting and capable to bear axial force,rsultant moment and considerable large radial force. The single-row crossed roller slewing rings are widely used for hoisting,transporting,engineering machines as well as for military products.