Q: Characteristics and applications of crossed roller bearings.
A: The rolling elements of crossed roller bearings are cylindrical rollers or tapered rollers, which are arranged vertically at 90° to each other in a V-shaped raceway. The rollers are separated by retainers or isolation blocks. This structure enables each set of bearings to withstand axial loads, radial loads and overturning moments. The inner and outer ring sizes of crossed roller bearings are miniaturized, and the extremely thin form is close to the limit of small size, and has high rigidity, and the accuracy can reach high precision levels. High-precision products are suitable for the joints and rotating parts of industrial robots, rotary tables of machining centers, precision rotary tables, medical equipment, measuring instruments and 1C manufacturing devices.
Characteristics of crossed roller bearings:
1. Excellent rotation accuracy
The internal structure of the crossed roller bearing adopts rollers arranged vertically and crosswise at 90° to each other. Retainers or isolation blocks are installed between the rollers to prevent the rollers from tilting and reduce the friction between the rollers, effectively preventing the increase of rotation torque. In addition, compared with the use of steel plate retainers, there will be no one-sided contact or locking of the rollers; at the same time, because the inner and outer rings are separated structures, the gap can be adjusted, and high-precision rotation can be obtained even if preload is applied.
2. Simplified operation and installation
The outer ring or inner ring separated into two parts is fixed together after the rollers and retainers are installed, so it is easier and simpler to install.
3. Bear large axial and radial loads
Because the rollers are arranged vertically to each other on the 90°V-groove rolling surface through the spacer retainer, this design allows the cross roller bearing to withstand large axial loads, radial loads, overturning moments and other loads in all directions.
4. Greatly save installation space
The inner and outer ring sizes of the cross roller bearing are minimized, especially the ultra-thin structure is close to the limit of small size, and has high rigidity, so it is suitable for precision workplaces with space requirements.
Common structures of cross roller bearings include: RB type (inner ring as a whole, outer ring separated), RE type (outer ring as a whole, inner ring separated), RU type (inner and outer ring as a whole, with mounting holes), CRB (C, H, ....) type (inner and outer ring as a whole, ultra-thin), SX type (inner ring as a whole, outer ring separated, ultra-thin), etc.
See the figure below:
About JHB:
LuoYang JinShuo Precision Bearing Co., Ltd. is mainly committed to the R&D and sales of high-precision bearings and other special products, and provides bearings and transmission parts with high performance for customers' equipment. With quick response, from pre-sales technical communication to on-time production delivery, as well as perfect after-sales service, we win the recognition and trust of customers.
Our main products include cylindrical roller bearings, tapered roller bearings, slew bearings, gear drives, spindle bearings, crossed roller bearings, turret bearings, thin-wall bearings, tandem roller bearings, spherical roller bearings, etc. The bearing dimensions rang from 100mm to 6000mm, the accuracy reaches P5, P4 and P2 levels. The bearing are widely used in mining and metallurgy, industrial equipment, industrial gearboxes, petroleum equipment, cranes, medical equipment, robotic equipment, etc. Among them, cylindrical roller bearings with better performance and high-precision deep groove ball bearings have been explored for high-speed tubular strander rotating cable equipment, which have completely replaced imports, saving customers costs and time, and improving work efficiency. It has been recognized and widely praised by customers.
Contact JHB:
Address: Yiyang Bearing Industry Zone, Luoyang City, China 47100
Tel/Wechat: +86-18037970383
Whatsapp: +86-18037970383
Fax: 0086-379-65199160
E-mail: lyjh@lyjhbearing.com
sales@lyjhbearing.com
Website: www.chinajhbearing.com
www.lyjhbearing.com
