Crossed Roller Bearings for Precision Rotary Applications
High-rigidity crossed roller bearings for robot joints, rotary tables, machine tools and compact precision rotary systems.
- RA, RB, RU, RE, CRB, CRBH & XSU Series
What Are Crossed Roller Bearings?
Crossed roller bearings are compact precision bearings used where radial load, axial load and tilting moment must be supported at the same time.
One bearing can often replace a paired bearing arrangement.
In a crossed roller bearing, cylindrical rollers are arranged alternately at right angles between the inner and outer rings. This layout gives the bearing good rigidity in a limited space and helps keep rotation stable under combined loads.
For equipment designers, the value is practical: fewer bearing positions, a simpler surrounding structure and better support for precision rotary movement.
Crossed Roller Bearing Series
TEDIN supplies crossed roller bearings in different structures for compact rotary assemblies, robot joints, rotary tables and precision positioning equipment.
RA Series Crossed Roller Bearings
Thin-section type for designs where bearing height and radial space are both limited.
RB Series Crossed Roller Bearings
Basic crossed roller bearing type with an integrated inner ring and separable outer ring.
RE Series Crossed Roller Bearings
Structure with integrated outer ring and separable inner ring, suitable for outer ring rotation.
RU Series Crossed Roller Bearings
Integrated inner and outer rings with mounting holes for direct installation.
CRB Series Crossed Roller Bearings
Standard cross roller bearing series for compact support under combined loads.
CRBH Series Crossed Roller Bearings
High-rigidity series for rotary structures that require stronger support and stable rotation.
XSU Series Crossed Roller Bearings
Light-section crossed roller bearings with mounting holes for compact direct mounting.
Crossed Tapered Roller Bearings
Crossed tapered roller bearing designs for higher load and rigidity requirements.
Need help matching a bearing series? Send us the model number, drawing or working conditions. TEDIN can check the structure and recommend a suitable crossed roller bearing series.
Ask for Selection SupportAdvantages of Crossed Roller Bearings
Crossed roller bearings are used in rotary parts that need compact size, rigid support and stable positioning.
Supports radial, axial and moment loads
The crossed roller arrangement allows one bearing to carry loads from different directions, including overturning moment load.
Saves installation space
One crossed roller bearing can often replace a set of radial and thrust bearings, which helps simplify the rotary structure.
Improves rigidity in compact assemblies
Rollers are arranged alternately at right angles, giving the bearing stable support when space is limited.
Suitable for accurate rotary motion
It is commonly used in rotary tables, robot joints and positioning units where smooth rotation and repeatability matter.
Available in different ring structures
RA, RB, RE, RU, CRB, CRBH and XSU series cover thin-section designs, direct mounting and different rotation methods.
Used in precision equipment
Typical equipment includes industrial robots, machine tools, inspection systems, medical devices and automation machinery.
Crossed Roller Bearing Applications
Crossed roller bearings are used in rotary structures where space is limited and the bearing must support load from more than one direction.
Industrial Robots
Used in robot joints, wrists and arm rotation units where compact structure, rigidity and repeatable motion are required.
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Rotary Tables
Suitable for indexing tables and rotary platforms that need stable support under axial, radial and moment loads.
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Machine Tools
Used in rotary axes, tool changers and precision tables where rigidity and controlled runout are important.
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Inspection Equipment
Applied in measuring instruments and inspection systems that require smooth rotary movement and stable positioning.
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Medical Equipment
Used in compact rotary mechanisms where smooth motion, low deflection and reliable positioning are needed.
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Automation Equipment
Used in compact rotary modules, handling systems and positioning devices in automated production lines.
View ApplicationHow to Select Crossed Roller Bearings
Selection starts from the load, rotating ring, mounting method, available space and required accuracy.
Load condition
Check radial load, axial load and moment load before selecting the bearing size.
Rotating ring
Confirm whether the inner ring or outer ring rotates in the equipment.
Mounting method
Check whether the bearing needs mounting holes, housing or pressure flange.
Installation space
Compare available bore, outer diameter and width with standard series dimensions.
Accuracy and rigidity
Confirm runout, preload and rigidity requirements for precision rotary parts.
| Requirement | Series to Consider | Typical Use |
|---|---|---|
| Limited installation space | RA, CRBH | Compact rotary parts, thin-section structures |
| Inner ring rotation | RB, CRB | Robot joints, rotary tables, positioning units |
| Outer ring rotation | RE | Rotary structures where the outer ring is the rotating side |
| Direct mounting required | RU, XSU | Assemblies that need mounting holes on inner and outer rings |
| Higher rigidity required | RU, XSU, crossed tapered roller bearings | Machine tools, heavy rotary tables, high moment load positions |
Selection note: Final selection should be checked with bearing dimensions, load values, rotating ring, mounting method and required accuracy.
Custom Crossed Roller Bearing Solutions
TEDIN can produce crossed roller bearings according to drawings, samples, replacement models or specific installation requirements.
| Customization Item | Available Options | Typical Purpose |
|---|---|---|
| Dimensions | Custom bore, outer diameter, width and mounting size. | Fit limited space or existing machine structures. |
| Ring structure | Integrated ring, split ring and mounting hole design. | Match inner or outer ring rotation and assembly method. |
| Gear structure | Internal gear, external gear or special gear interface. | Used in rotary tables, robot joints and drive units. |
| Accuracy grade | Standard or higher precision grades. | Control runout and rotation accuracy. |
| Clearance & preload | Custom clearance, negative clearance or preload. | Improve rigidity and stable rotation. |
| Material & heat treatment | Bearing steel, stainless steel and hardness control. | Meet load, wear and environment requirements. |
| Surface treatment | Anti-rust oil, black oxide or phosphating. | Improve storage and corrosion protection. |
| Sealing & lubrication | Open type, sealed type and grease selection. | Adapt to speed, maintenance and contamination conditions. |
Precision & Preload
- Custom accuracy grade
- Runout control
- Clearance adjustment
- Preload for higher rigidity
Surface Protection
- Anti-rust oil treatment
- Black oxide treatment
- Phosphating treatment
- Packaging for long-distance shipping
Structure Modification
- Internal gear design
- External gear design
- Mounting holes
- Split or integrated ring structure
For custom production: please provide the drawing, target dimensions, load condition, rotating ring, mounting method, accuracy requirement and working environment. If you need replacement support, send the current bearing model or sample details.
Crossed Roller Bearing Quality Control
Quality control focuses on raceway accuracy, roller matching, preload condition and final rotation performance.
Controlled Process for Precision Rotary Applications
Crossed roller bearings are often used in compact rotary mechanisms where rigidity and running accuracy are critical. During production, TEDIN checks material condition, heat treatment, raceway grinding, roller matching and assembly clearance to keep each bearing consistent with the drawing requirements.
The same inspection logic is also applied across other bearing categories in our bearing quality control process.
Key Control Points
- Material and hardness before finishing and assembly
- Raceway grinding for geometry and surface condition
- Roller matching for stable internal clearance
- Preload adjustment according to rigidity requirements
- Final inspection for dimensions, runout and rotation
Dimensional Inspection
Bore, outer diameter, width and mounting dimensions are checked against the drawing.
Runout Test
Radial runout, axial runout and rotation accuracy are checked for precision rotary use.
Clearance & Preload Check
Internal clearance or preload is controlled to support rigidity and smooth rotation.
Final Inspection & Packing
Bearings are cleaned, rust-protected and packed after final inspection.
Crossed Roller Bearing FAQs
Answers to common questions about crossed roller bearing structure, load capacity, selection, customization and replacement.
What is a crossed roller bearing and how does it work?
A crossed roller bearing uses cylindrical rollers arranged alternately at right angles between the inner and outer rings. This design allows one compact bearing to support radial load, axial load and tilting moment load while maintaining high rigidity and smooth rotation.
Can crossed roller bearings support radial, axial and moment loads?
Yes. Crossed roller bearings are designed to carry radial loads, axial loads in both directions and moment loads at the same time. This makes them suitable for rotary tables, robot joints, indexing units, measuring equipment and other precision rotary mechanisms.
How do I select the right crossed roller bearing for my application?
Selection should consider mounting space, bore size, outer diameter, width, load direction, load value, required rigidity, rotation accuracy, speed, lubrication and installation structure. If you have a drawing or existing model number, TEDIN can help check dimensions and recommend a suitable bearing.
Do you offer custom crossed roller bearings?
Yes. TEDIN can manufacture custom crossed roller bearings according to drawings or specific application requirements. Custom options may include dimensions, mounting holes, accuracy class, clearance, preload, material, sealing structure and surface treatment.
Can TEDIN crossed roller bearings replace THK, IKO or NSK models?
In many cases, TEDIN can provide crossed roller bearings with dimensions comparable to common international series. Please send the original THK, IKO, NSK or other model number, drawing, or key dimensions so our team can check interchangeability before quotation.
What information is needed for a crossed roller bearing quotation?
Please provide the bearing type, bore size, outer diameter, width, load condition, accuracy requirement, clearance or preload, quantity and application. If available, a drawing, sample photo or existing part number will help us quote faster and more accurately.
Explore More Bearing Solutions
In addition to crossed roller bearings, TEDIN supplies a wide range of precision and heavy-duty bearings for industrial equipment, rotary systems and high-load applications.
Need a Crossed Roller Bearing Quote or Replacement Check?
Send us your bearing model, drawing, dimensions, load requirements or application details. TEDIN will help verify the crossed roller bearing type, check replacement feasibility and provide a suitable precision rotary bearing solution for your equipment.
WhatsApp: +86 13663889399 Tel: +86 13663889399 Email: info@tedinbearings.com