CRBC

The CRBC Series Crossed Roller Bearings are high-precision bearings designed to support radial, axial, and moment loads simultaneously. Featuring a space-efficient structure, high rigidity, and excellent rotation accuracy, these bearings are ideal for applications where precise inner ring rotation is required in compact assemblies.

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Key Features of CRBC Series Crossed Roller Bearings

1. Multi-Directional Load Support

The CRBC series bearings are engineered to handle combined loads in all directions—radial, axial, and moment—within a single compact unit. This makes them ideal for high-performance rotating mechanisms requiring stability and space optimization.

2. Space-Saving Design

These bearings are constructed with a minimal cross-section, allowing designers to make the best use of limited installation space without compromising rigidity or performance.

3. High Rigidity and Rotation Accuracy

Supplied with normal clearance, zero clearance, or preload configurations, CRBC bearings ensure stable rotation, high rigidity, and exceptional running accuracy. This makes them suitable for demanding applications like robotic joints and machine tools.

4. Crossed Roller Structure

Cylindrical rollers are arranged orthogonally in a 90° V-groove, alternating directions to efficiently distribute loads and minimize rotational friction. A space retainer separates the rollers to prevent contact and reduce wear.

5. Split Outer Ring for Easy Mounting

The outer ring of the CRBC bearing is split and fixed with bolts, making assembly easier and reducing the potential for mounting-related accuracy loss. The inner ring is a solid piece, making this series especially suitable for applications demanding inner ring rotation accuracy.

Technical Specifications

Design: Thin-section crossed roller bearing
Roller Arrangement: 90° V-groove with orthogonal cylindrical rollers
Ring Construction: Split outer ring, integrated inner ring
Size Range:
- Inner Diameter (ID): 30 mm – 800 mm
- Outer Diameter (OD): 55 mm – 950 mm
Clearance Options: Normal clearance, slight clearance, or preload
Optimal for: Inner ring rotation accuracy

Typical Applications

The CRBC Series is widely used in applications requiring high rigidity and rotational precision within compact dimensions. These include:

Industrial robot joints and arms
Swiveling tables of machining centers
Manipulator rotary units
Precision rotary tables
Medical imaging and diagnostic machines
Measurement instruments
Semiconductor and IC manufacturing equipment

Conclusion

The CRBC Series Crossed Roller Bearings offer a high-performance solution for compact designs that demand simultaneous load support and precise inner ring rotation. With a split outer ring and advanced roller alignment, they provide excellent rigidity, stable operation, and long-lasting reliability in demanding applications across robotics, machine tools, and precision engineering fields.