RB Series Crossed Roller Bearings

RB Series Crossed Roller Bearings are high-precision rotary bearings designed to simultaneously handle radial, axial, and moment loads. With a unique inner-ring rotation design and compact structure, they are ideal for applications requiring high rigidity, excellent rotation accuracy, and limited installation space.

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Key Features of RB Series Crossed Roller Bearings

1. Multi-Directional Load Capacity

RB crossed roller bearings are capable of withstanding radial, axial, and moment loads at the same time, making them ideal for precision equipment requiring complex force support in compact designs.

2. High Rotation Accuracy with Preload

The bearing clearance of the RB series can be adjusted to apply preload, ensuring minimal runout and smooth, stable rotation—essential for applications like rotary indexing and robotic joints.

3. Spacer Retainer for Smooth Performance

Each cylindrical roller is arranged orthogonally in a 90° V-groove and separated by a precision-machined spacer retainer. This prevents roller skewing, reduces friction, and enables smoother, more efficient rotation.

4. Separable Outer Ring Design

The outer ring of the RB series is split and fixed by screws, allowing for easy installation and adjustment while maintaining high positioning accuracy for the rotating inner ring.

Technical Specifications

Rotation Design: Suited for applications requiring high rotation accuracy of the inner ring
Outer Ring: Separable and fixed by bolts
Size Range:
- Inner Diameter (ID): 20 mm – 125 mm
- Outer Diameter (OD): 36 mm – 1500 mm

Applications of RB Series Crossed Roller Bearings

RB crossed roller rings are widely used in precision systems where space is constrained but high performance is essential, including:

Industrial robot joints and swivel arms
Swiveling tables of CNC machining centers
Manipulator rotary units
Precision rotary tables
Medical imaging equipment (e.g., CT, MRI scanners)
Measuring instruments
IC manufacturing machines

Conclusion

As the foundational model in high-precision crossed roller bearings, RB Series Crossed Roller Bearings offer compact design, high rigidity, and exceptional inner ring rotation accuracy. Their combination of performance, reliability, and ease of integration makes them a preferred solution in advanced automation, robotics, and precision machining applications.