High precision, high rigidity, high load-bearing capacity. It can withstand axial load, radial load, overturning moment, and has high anti-overturning stiffness. The high-speed rolling elements perform pure rolling during movement, so the limit speed is much higher than that of crossed cylindrical roller bearings. Low friction. The friction torque is much lower than that of crossed cylindrical roller bearings, and the starting torque is low. Compact design. The design is compact and requires a small installation space. These characteristics make it very suitable for occasions where space is limited, the center of gravity of the rotating mass is required to be as low as possible, and high speed requirements are required. For example, precision circular indexing tables for machine tools, vertical and horizontal boring machines, vertical grinders, rotary surface grinders, vertical lathes, large gear hobbing machines, turrets, large telescopes (radio, optical), rotating cameras, industrial robots, etc.