Single-row cross-roller wheel bearings is two blocks from the circle formed. It has a close- type design, light weight, high-precision, with the characteristics of small space. Gunzi is due to cross-arranged, it is suitable for high-precision installation, and can withstand axial force, and torque of a large radial load. Single-row cross-Gunzi wheel bearings widely used in lifting, transmission, engineering machinery, or even military goods.