High quality cross roller bearing THK RU445UUCOP4G-N made in Japan

 With the CrossRoller Ring, cylindrical rollers are arranged crosswise, with each roller perpendicular to the adjacent roller, in a 90 V groove, separated from each other by a spacer retainer. This design allows just one bearing to receive loads in all directions including, radial, axial and moment loads.Since the CrossRoller Ring achieves high rigidity despite the minimum possible dimensions of the inner and outer rings, it is optimal for applications such as joints and swiveling units of industrial robots, swiveling tables of machining centers, rotary units of manipulators, precision rotary tables, medical equipment, measuring instruments and IC manufacturing machines.

High Rotation Accuracy

The spacer retainer keeps rollers in their proper position, thereby  preventing  them  from  skewing.   This  eliminates friction between rollers, and therefore secures a stable rotation torque. Since the  inner   and  outer rings are designed   to   be separable, the  bearing  clearance can  be adjusted. In addition, highly accurate rotary motion is ensured through adjusting the bearing clearance to provide a preload.

Easy Handling

The inner and outer rings, which are separable, are secured to the Cross Roller Ring body after the  rollers and spacer retainers are installed.This procedure prevents the rings from separating from each other. Thus, it is easy to handle the rings when installing the Cross-Roller Ring.

Skewing Prevention

The spacer  retainer  fitting  among  crossarrayed rollers prevents rollers from skewing and the rotation torque from increasing duefriction between rollers. Unlike conventional types using steel sheet retainers, the CrossRoller  Ring  does  not  cause  displacement   or  locking  of rollers and provides a stable rotation torque.

Pictures of THK cross roller bearings

THK carton package

THK wodden package

Cross-Roller bearing outline

RB

Model RB(Separable Outer Ring,Type for Inner Ring Rotation)

Being the basic model of the Cross-Roller Ring,despite the minimum possible dimensions of the inner and outer rings,its outer ring is separable while the inner ring is integrated with the main body.This model is used in locations where the rotation accuracy of the inner ring is required.

RE

Model RE(Separable Inner Ring,Type for Outer Ring Rotation)

This new model is based on the design of pricipal of the RB,Having the same major dimensions as model RB,its inner ring its inner ring is separable while the outer ring is integrated with the main body,this model is used in location is used in location where the rotation accuracy of the outer ring is required.

RU

Model RU(Integrated Inner/Outer Ring Type)

Since the mounting holes are provided,this model does not require a presser flange or housing.In addition,because it has an integrated inner/outer ring structure and is equipped with washers,its performance is minimally affected by the mounting procedure,ensuring stable rotation accuracy and torque.This model can be used for both inner-ring rotation and outer-ring rotation.

 SX series

Application of cross roller bearings

THK brands of the cross roller bearings

Production process