RB2508 Crossed Roller Bearing
RB2508 is designed with orthogonally arranged cylindrical rollers that can simultaneously support radial, axial, and moment loads in both directions. Its lightweight structure and low sectional height make it ideal for precision equipment where compactness and stability are critical - such as rotary tables, industrial robots, measuring instruments, and semiconductor machinery.
Compact Structure
Integrated Inner Ring
High Load Capacity
Smooth Rotation
| Model | RB2508 |
| Inner Diameter (d) | 25mm |
| Outer Diameter (D) | 41mm |
| Roller Pitch Diameter (Dpw) | 32mm |
| Width (B) | 8mm |
| Chamfer (rmin) | 0.5 |
| Shoulder Size (ds) | 28.5 |
| Shoulder Size (Dh) | 35.5 |
| Basic Load Rating (Radial) Cr (kN) | 3.63 |
| Basic Load Rating (Radial) Cor (kN) | 3.83 |
| weight (kg) | 0.05 |
| Precision Class | P5 / P4 / P2 (available upon request) |
Packaging & Delivery
Each RB2508 bearing is individually packaged in anti-rust wrapping and shock-resistant boxes. Bearings are shipped with pre-lubrication and labeled for easy traceability. Bulk and OEM packaging are available upon request.
RB2508 Crossed Roller Bearing - FAQ
How should the RB2508 Crossed Roller Bearing be mounted?
The RB2508 features an integrated inner ring and split outer ring, allowing easy installation while maintaining high precision. The split outer ring should be carefully fastened with uniform torque to prevent distortion and ensure consistent load distribution.
Does the RB2508 require preload adjustment?
Yes, preload can be customized based on application needs-light preload for low torque and high-speed operation, or heavy preload for maximum rigidity and reduced vibration in static positioning systems.
Can the RB2508 replace other similar-size bearings?
Yes. The RB2508 can replace thin-section angular contact or thrust bearings in many applications. Its crossed roller design provides superior rigidity and multi-directional load support, making it a reliable upgrade for compact precision systems.
What are signs that the RB2508 bearing needs replacement?
Unusual noise, increased vibration, or irregular torque during rotation are common signs. In such cases, inspect the lubrication condition and check for surface wear. Early detection and timely replacement prevent equipment damage and downtime.
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