Characteristics and applications of crossed roller bearings

 

 

 

Abstract:

 The dimensions of the inner and outer rings of crossed roller bearings are miniaturized, and the ultra-thin type is close to the limit of small size. It has high rigidity and can reach high-precision grades. High-precision bearing products are suitable for joints and rotating parts of industrial robots, rotating tables of machining centers, precision rotating tables, medical equipment, measuring instruments, and IC manufacturing equipment.

 

Key words: Crossed roller bearings; cross roller bearings; high-precision bearing; industrial robots; machining centers; precision rotating tables; medical equipment; measuring instruments; IC manufacturing equipment.

 

 

The rolling elements of crossed roller bearings are cylindrical rollers or tapered rollers, arranged vertically at 90° to each other in a V-shaped raceway. The rollers are separated by cages or spacers. This structure allows each set of bearings to withstand axial load, radial load and overturning moment. The dimensions of the inner and outer rings of crossed roller bearings are miniaturized, and the ultra-thin type is close to the limit of small size. It has high rigidity and can reach high-precision grades. High-precision bearing products are suitable for joints and rotating parts of industrial robots, rotating tables of machining centers, precision rotating tables, medical equipment, measuring instruments, and IC manufacturing equipment.

 

 

Characteristics of crossed roller bearings:

 

1. Excellent rotation accuracy

The internal structure of crossed roller bearings uses rollers arranged perpendicularly at 90° to each other. There are retainers or spacers installed between the rollers, which can prevent the tilt of the rollers and reduce the mutual friction between the rollers, effectively preventing the increase of rotation torque. In addition, compared with using a steel plate cage, there will be no contact or locking on one side of the roller; at the same time, the inner and outer rings are separate structures, so the gap can be adjusted, and high-precision rotational motion can be obtained even if preload is applied.

 

2. Simplified operation and installation

The outer ring or inner ring that is separated into two parts is fixed together after the rollers and retainers are installed, so it is easier and simpler to install.

 

3. Bear larger axial and radial loads

The rollers are arranged vertically to each other through spacers on the rolling surface of 90° V-groove raceway. This design allows the crossed roller bearing to withstand larger axial load, radial load, overturning moments, etc.

 

4. Significantly save installation space

The dimensions of the inner and outer rings of crossed roller bearings have been minimized. The ultra-thin structure in particular is a compact size close to the limit and has high rigidity, so it is suitable for precision workplaces with space requirements.

 

 

We can provide CRB Series, RU Series, RB Series, RA Series crossed roller bearings. If you request crossed roller bearings, please contact us via email sales@brzbearing.com.