RB90070 Crossed Roller Bearing
The RB90070 crossed roller bearing is one of the larger-dimension bearings in the RB series, engineered to provide high rigidity, precision, and reliability for heavy-duty rotary applications. Its crossed roller design, with cylindrical rollers arranged alternately at right angles between the inner and outer rings, allows the bearing to support radial, axial, and moment loads simultaneously.
Advantages
- Crossed roller design for superior load balance and rigidity
- Optimized for large-diameter, high-stiffness applications
- Reduced rotational torque for energy-efficient operation
- Exceptional dimensional accuracy and long-term stability
Technical Specifications
| Bearing Type | RB90070 Crossed Roller Bearing |
| Inner Diameter (d) | 900 mm |
| Outer Diameter (D) | 1050 mm |
| Roller Pitch Diameter (Dpw) | 969 mm |
| Width (B) | 70 mm |
| Chamfer (rmin) | 4 |
| Shoulder Size (ds) | 937 |
| Shoulder Size (Dh) | 1001 |
| Basic Load Rating (Radial) Cr | 494 kN |
| Basic Load Rating (Radial) Cor | 1490 kN |
| weight | 120 kg |
| Rolling Element | Cylindrical Roller, Crossed Arrangement |
| Inner Ring Structure | Integrated Type |
| Outer Ring Structure | Split Type |
Customization Options
- Cage Materials - Cages can be made from brass, resin, or steel to suit various load and environmental conditions.
- Surface Treatment - Optional black oxide, nickel plating, or anti-corrosion coatings enhance protection and extend bearing life.
- Precision and Mounting - Customized tolerance grades and mounting hole patterns can be provided to fit specific installation or performance requirements.
RB90070 Crossed Roller Bearing – FAQ
What kind of accuracy can be expected from this bearing?
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Each RB90070 bearing is precision-ground to ensure minimal runout and stable rotation, ideal for applications demanding high positioning accuracy, such as CNC rotary tables and robotic arms.
How does the RB90070 improve system performance compared with standard bearings?
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Its crossed roller design reduces rotational torque while maintaining high rigidity, allowing for faster response, better accuracy, and reduced wear in precision motion systems.
Can the RB90070 bearing be used in semiconductor manufacturing equipment?
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Yes. It performs well in cleanroom environments when equipped with vacuum or low-particle lubrication, ensuring precise wafer handling and smooth rotation.
What maintenance practices are recommended for industrial automation use?
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Regular inspection of lubrication and preload settings, along with proper sealing against dust and moisture, ensures reliable operation and longer service life in automated machinery.
Is installation complicated due to the split outer ring design?
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No. The split outer ring simplifies assembly and ensures accurate alignment. It also makes maintenance and replacement easier without disturbing the inner components.
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