The internal structure of the crossed roller bearing adopts rollers placed vertically and intersecting each other at 90°, and distance maintainers or spacers are installed between the rollers, which can prevent the skew of the rollers and rubbing each other between the rollers, thereby avoiding rotation increase in torque. In addition, there will be no square contact or locking of the rollers; non-standard crossed roller bearings, and because the inner and outer rings are cut, the gap can be adjusted, and high-precision rotation can be achieved even if preload is applied in sports.
