Cross cylindrical roller bearings, the use of cross-distribution of cylindrical roller bearings realize rolling elements and raceways line contact, high rigidity and high precision bearing swivel rotation, while the axial and radial overturning moment. Used for precision machine tools, precision rotary tables, medical equipment and industrial robots, palletizing machines, precision, high rigidity arm stacking work requires high precision turning and other fields. Features:? With excellent precision crossed roller bearings rotary internal structure of the roller was 90 ° perpendicular cross arrangement, equipped with roller spacing between cage or spacers can be prevented by tilting roller between the rollers each other mill inspections, effectively preventing the increase in rotational torque. Further, one of the rollers does not occur or the contact phenomenon locking phenomenon; the same time because the inner and outer rings is divided structure, the gap can be adjusted, even if the preload is applied, can be obtained with high accuracy rotational movement. Bear large axial and radial load because the rollers are arranged vertically spaced retainer by 90 ° to each other in a V-shaped groove raceway, this design enables cross roller bearings can withstand greater radial loads in all directions load, axial and moment loads, etc.