Crossed Roller Bearings: A Comprehensive Guide

Crossed Roller Bearings: A Comprehensive Guide 

High-Performance Bearings for Compact, Precision-Driven Applications

In automation and machinery industries, the performance of rotary components is critical to overall system reliability, stability, and lifespan. With high rigidity, precision, and a compact footprint, crossed roller bearings (CRBs) have become the go-to solution for high-end equipment such as industrial robots, CNC machines, and medical devices. This article introduces CRBs in detail and explores how BOM's modular integration approach can help customers achieve better performance with less effort.

1. What Are Crossed Roller Bearings?

CRBs feature cylindrical rollers arranged at 90° intervals in alternating orientation. This layout enables a single bearing to simultaneously support radial, axial, and moment loads. Line contact between rollers and raceways ensures high stiffness and accuracy.

Structural Highlights:

• Crossed roller arrangement for uniform load distribution

• Line contact enhances rigidity and precision

• Available in single-row, double-row, and flange types

2. Key Advantages of CRBs

High Rigidity & Load Capacity
The cross arrangement increases contact surface area, allowing higher load-bearing within a smaller envelope.

Superior Rotational Accuracy
Precision fit and optimized preload result in exceptional stability and repeatable motion control.

Compact Design for Lightweight Systems
Compact axial height allows for space savings and helps improve the responsiveness of the entire system.

Low Friction & Quiet Operation
Careful surface finishing and optimized lubrication reduce noise and friction—ideal for medical or cleanroom applications.

Long Service Life with Low Maintenance
Engineered materials, advanced processing, and robust sealing ensure long-term durability and reduced maintenance needs.

3. Key Applications

• Machine Tools: Rotary tables, indexing heads

• Robotics & Automation: Arm joints, rotary platforms, AGVs

• Medical Devices: CT scanners, surgical systems, microscopes

• Semiconductor & Photovoltaics: Wafer stages, tracking systems

• Aerospace & Defense: Radar systems, guidance platforms

4. BOM’s Advantages in Crossed Roller Bearings

Modular Design & Integration

• Flexible configurations to fit different installations

• Custom sealing and lubrication solutions for varying environments

• Pre-assembled integration with rails, housings, or brackets to reduce field errors

Precision Engineering & Full-Process Quality Control

• Advanced machining techniques ensure tight, consistent tolerances

• Specialized heat treatment and surface finishing for durability and wear resistance

• Comprehensive inspection from raw materials to final assembly

Value from Integrated Design

• Factory-set preload and alignment eliminate complex tuning

• Fewer assembly steps save labor and reduce risk

• System-level coordination ensures structural and dynamic compatibility

Technical Support

• Engineering assistance with 3D models, load calculations, and application evaluation

• Ongoing feedback-driven product upgrades

5. Conclusion

Crossed roller bearings provide compact, high-performance solutions for modern motion systems. BOM delivers integrated, modular bearing systems that simplify engineering and elevate performance across industries.

Contact us at Contact@bom-cn.com. Let BOM's Crossed Roller Bearings become the cornerstone of your precision motion systems.