Hiwin’s crossed roller bearings consist of an outer ring, an inner ring, and a plurality of rollers and spacers. The roller lies between the inner and outer ring with the spacers placed between the rollers to prevent the mutual friction between them thereby decreasing the torque resistance for rotation. Crossed roller bearings are highly rigid bearings with high loading capacities. Compact design, smooth rotation, with easy installment and adjusting. Customized designs are available.