RB4010 cross roller bearing is a compact precision bearing with a 40 mm bore, 65 mm outer diameter and 10 mm width. Its integrated inner ring, separable outer ring and crossed cylindrical roller arrangement provide high rigidity, accurate inner-ring rotation and simultaneous support for radial, axial and moment loads.
LYDL manufactures RB4010 bearings for robot joints, indexing tables, measuring instruments, optical inspection systems and precision automation. P5 and P4 grades are available, while P2 accuracy, controlled preload, sealing, lubrication, marking and inspection documentation can be supplied according to confirmed application requirements.
RB4010 cross roller bearing is a compact precision bearing with principal dimensions of 40 mm bore, 65 mm outer diameter and 10 mm width. It is designed for rotary mechanisms requiring high rigidity, accurate positioning and combined-load support within limited installation space.
The RB4010 has an integrated inner ring and a separable outer ring. Cylindrical rollers are arranged alternately at 90 degrees between precision-ground V-shaped raceways, allowing one bearing to support radial loads, axial loads in both directions and overturning moments.
Its 40 mm bore makes the RB4010 a practical intermediate option between the smaller RB3010 and the larger RB5013. It is commonly selected for robot joints, compact indexing mechanisms, measuring equipment and precision automation systems.
| Parameter | Specification |
|---|---|
| Bearing model | RB4010 |
| Bearing type | Cross roller bearing |
| Bore diameter (d) | 40 mm |
| Outer diameter (D) | 65 mm |
| Width (B) | 10 mm |
| Roller pitch circle diameter (dp) | 51.5 mm |
| Shaft shoulder diameter ds (max.) | 46.5 mm |
| Housing shoulder diameter Dh (min.) | 57.5 mm |
| Minimum chamfer dimension (r min.) | 0.6 mm |
| Basic dynamic radial load rating (Cr) | 8.33 kN, catalogue reference |
| Basic static radial load rating (C₀r) | 10.6 kN, catalogue reference |
| Approximate mass | 0.16 kg |
| Bearing material | GCr15 or equivalent high-carbon chromium bearing steel, subject to order specification |
| Available accuracy | P5, P4 and customized P2 |
| Clearance options | C0, CC0 preload or customized clearance |
| Sealing options | Open, single-sealed or double-sealed |
The dimensions and load ratings above are based on publicly available RB4010 catalogue references. Final supply specifications are governed by the LYDL drawing and technical documents confirmed for each order.
The one-piece inner ring provides stable geometry and is suitable for applications requiring accurate inner-ring rotation. The separable outer ring enables assembly of the crossed rollers and spacers but must be fully supported and evenly clamped after installation.
Each cylindrical roller is positioned perpendicular to the adjacent roller. The resulting line contact and crossed arrangement provide higher rigidity than many point-contact ball bearings of comparable dimensions.
A single RB4010 bearing can support:
This can simplify the surrounding shaft structure and reduce the need for separate radial and thrust bearings.
Individual spacers help prevent direct contact between adjacent rollers, reduce friction and maintain consistent roller spacing. Precision-ground raceways and controlled internal clearance further contribute to smooth rotation.
RB4010 is especially useful when a 40 mm shaft diameter is required but installation space does not permit a conventional multi-bearing arrangement.
Compared with RB3010, the RB4010 provides:
Compared with RB5013, it retains a thinner 10 mm width and smaller 65 mm outer diameter, making it more suitable for lightweight and space-limited equipment.
RB4010 is suitable for:
Final selection should be based on the actual radial load, axial load, overturning moment, speed, operating cycle, mounting rigidity and required service life.
| Configuration | Recommended Use |
|---|---|
| P5 accuracy | General precision automation and positioning mechanisms |
| P4 accuracy | Robot joints, measuring systems and precision rotary stages |
| Customized P2 | Applications requiring very high running accuracy, subject to technical confirmation |
| C0 clearance | Applications requiring standard positive or near-zero operating clearance |
| CC0 preload | High-rigidity mechanisms requiring reduced internal play |
| Open type | Clean equipment and applications requiring lower seal friction |
| U or UU seals | Applications requiring improved grease retention and contamination protection |
CC0 bearings should not be installed with excessive interference. Excessive fitting force can increase preload, rotational torque and operating temperature.
Common designation references may include:
Suffix definitions can vary among manufacturers. Customers should provide the complete bearing designation, existing marking, technical drawing or operating requirements when requesting a quotation.
The designation THK RB4010 is widely used as an international dimensional reference for this bearing type. Its published principal dimensions are 40×65×10 mm.
LYDL can manufacture an RB4010 bearing using corresponding principal dimensions and agreed technical requirements. However, dimensional similarity alone does not guarantee complete interchangeability.
Before replacing an existing THK RB4010, RB4010UUC0 or RB4010UUCC0 bearing, the following items should be confirmed:
The final replacement decision should be based on the approved LYDL drawing and application conditions.
Because the RB4010 has a separable outer ring, mounting accuracy and clamping uniformity directly affect its performance.
For P4 or P2 applications, the shaft, housing, shoulders and clamping cover must have corresponding dimensional and geometrical accuracy. Bearing accuracy alone cannot compensate for mounting deformation or inaccurate surrounding components.
LYDL manufactures precision cross roller bearings through controlled turning, heat treatment, cryogenic stabilization, raceway grinding, superfinishing, roller sorting, cleaning and precision assembly.
Available inspection and customization options include:
LYDL provides RB4010 bearings for customers requiring a balance of accuracy, rigidity, manufacturing flexibility and delivery time.
Customers can receive:
The RB4010 has a 40 mm bore, 65 mm outer diameter and 10 mm width.
Its crossed roller structure supports radial loads, axial loads in both directions and overturning moments. Actual allowable loads depend on the combined loading, preload, speed and mounting conditions.
RB3010 measures 30×55×10 mm, while RB4010 measures 40×65×10 mm. RB4010 provides a larger bore and higher static load capacity while retaining the same 10 mm width.
The principal dimensions may correspond, but complete compatibility depends on accuracy, preload, seals, fits and operating requirements. The LYDL drawing should be approved before replacement.
P2 accuracy can be supplied as a customized configuration after the runout, preload, torque, quantity and inspection requirements have been confirmed.
Please provide the complete model, quantity, accuracy grade, clearance or preload, sealing requirement, rotational speed, application and delivery destination.
For a smaller 30 mm bore and lighter rotary mechanism, consider the RB3010 Cross Roller Bearing.
For a larger 50 mm bore and higher structural stiffness, consider the RB5013 Cross Roller Bearing.
THK and its product designations are trademarks of their respective owner. LYDL is an independent bearing manufacturer and is not affiliated with, authorized by or endorsed by THK. Brand and model references are provided only for technical identification and cross-reference purposes.
Contact LYDL for an RB4010 cross roller bearing quotation, drawing or application review. Please provide the required quantity, accuracy grade, clearance or preload, sealing configuration and operating conditions so that the appropriate specification can be confirmed.
