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Crossed Roller Bearings

In a cross roller bearing, the cylindrical rollers are arranged perpendicular to each other through spacers on the rolling surfaces of the V- groove at 90°. This design enables cross roller bearings to withst and radial loads, axial loads and moment loads in all directions. At the same time, the size of the inner and outer rings is minimized, especially the ultra-thin form is a small size close to the limit, and has high rigidity, so it is suitable for the joint parts or rotating parts of industrial robots,and the rotary table of machining centers.Manipulator rotating parts, precision rotary table, medical instruments,measuring instruments, IC manufacturing equipment,etc.are widely used.




XRA (integral inner ring, separate outer ring, ultra-thin) this model is the XRB outer ring thickness reduced to the limit of the compact, structure and XRB outer ring structure, suitable for heavy light, compact design, such as robot and manipulator rotating parts. The three types have the same shape and size. The difference lies in that the outer ring of XRA is transverse section, the outer ring of XRA-C is longitudinalsection, and the outer ring of XRBS series is integral structure.



XRB (integral inner ring, separate outer ring) This model is the basic type of cross roller bearing. The outer ring is divided into two pieces, and the inner ring is an integral structure, which is suitable for occasions requiring inner ring rotation accuracy. XRBC type is built with steel re-holder on the basis of XRB type. It is suitable for the occasion with slightly higher working temperature and speed requirement. It is generally open structure.


XRBH (integral inner and outer ring, ultra-thin), due to the ultra-thin design and no mounting holes for outer and inner rings, flange and support seat are required for installation. In addition, because the outer ring and inner ring are integral structure, installation has no impact on performance, so it can obtain stable rotation accuracy and torque, suitable for the outer ring and inner ring rotation but the size of the occasion.


XRC (integral inner ring, separate outer ring, ultra-thin), in the same journal, this type has smaller than XRB type, the section size of the adoption of ultra-thin design, outer ring and inner ring no mounting holes, and the need to flanges brackets fixed, applicable to the inner ring spinning.


XRE (inner ring split, outer ring as a whole) is also the basic type of cross roller bearing, the size and XRB type is the same, but the structure of the outer ring as a whole, the inner ring is divided into two pieces, it is most suitable for the occasion that requires the outer ring rotation accuracy.




XRU (inner and outer ring as a whole, with mounting holes), because of the mounting holes, do not need to fix flange and support seat during installation. In addition, since both the outer and inner rings are integral, the installation has little impact on performance, thus achieving stable rotation accuracy and torque. Suitable for outer and inner ring rotation. Because XRSU structure is the same as XRU, the thinner design, so compared with XRU has a more compact size shape and higher rotation accuracy, suitable for the installation space is limited and requires higher precision occasions. The XV series has mounting holes on the outer ring, but not on the inner ring.


Cross tapered roller bearings are composed of two rows of bearing raceways perpendicular to each other and a group of tapered rollers arranged at 90° cross each other. The mutual friction between them reduces the rotational torque, and it can withstand radial loads, axial negative combined loads such as load and overturning moment.