RB2508 Precision Cross Roller Bearing | 25×41×8 mm
The RB2508 cross roller bearing is a compact precision bearing with a 25 mm bore, 41 mm outside diameter and 8 mm width. Its small installation envelope makes it suitable for precision rotary mechanisms requiring high rigidity, accurate positioning and smooth motion.
RB2508 features an integrated inner ring and split outer ring without integral mounting holes. Cylindrical rollers are arranged alternately at 90 degrees, enabling one bearing to support radial loads, axial loads in both directions and overturning moments. The integrated inner ring makes this model particularly suitable for applications requiring accurate inner-ring rotation.
Key specifications:
Dimensions: 25 × 41 × 8 mm
Structure: Integrated inner ring and split outer ring
Approximate weight: 0.05 kg
Material: GCr15, 100Cr6 or equivalent bearing steel
Accuracy options: P5, P4, P2 or customized
Available configurations: Open or sealed
Clearance or preload: Confirmed according to application requirements
The RB2508 cross roller bearing is commonly used in small robot joints, compact rotary tables, optical inspection equipment, measuring instruments, semiconductor automation and precision positioning systems.
LYDL can provide customized accuracy, clearance or preload, grease, sealing, marking, inspection reports and export packaging. Please send us your required quantity, accuracy grade, operating loads, speed and replacement model for technical confirmation and quotation.
RB2508 Cross Roller Bearing Overview
RB2508 Precision Cross Roller Bearing is a compact precision bearing with a 25 mm bore, 41 mm outer diameter and 8 mm width. It is designed for rotary mechanisms that require high rigidity, smooth rotation and accurate positioning in a limited installation space.
This model is suitable for compact rotary tables, small robot joints, measuring instruments, optical inspection equipment, semiconductor automation systems and precision positioning mechanisms.
LYDL manufactures RB2508 and other RB series cross roller bearings with optional accuracy grades, preload or clearance control, grease selection, sealing options, laser marking and anti-rust packaging according to customer requirements.
Cylindrical rollers arranged alternately at 90 degrees
Mounting Holes
Without mounting holes
Sealing Option
Open type or sealed type available upon request
Accuracy Grade
P5 / P4 / P2 available upon request
Material
High-carbon chromium bearing steel, such as GCr15 / 52100 or equivalent
Lubrication
Grease lubrication
Approx. Weight
0.05 kg
Manufacturer
Luoyang Deeplink Technology Co., Ltd. / LYDL
Note: The above specifications are for model selection reference. For final installation design, please confirm the drawing, accuracy grade, clearance or preload requirement before ordering.
Structure Features
RB2508 uses the typical RB series structure: an integrated inner ring and a split outer ring. Cylindrical rollers are arranged alternately at 90 degrees, allowing the bearing to support radial load, axial load and overturning moment in one compact unit.
This structure is suitable for applications where inner ring rotation accuracy is important. Compared with using multiple conventional bearings, RB2508 can help simplify compact rotary mechanisms while maintaining good rigidity and stable rotation.
Main Advantages
Compact design: 25 × 41 × 8 mm size for limited installation space.
High rigidity: Crossed cylindrical rollers provide strong support in a small section.
Combined load capacity: Supports radial, axial and moment loads at the same time.
Stable rotation: Suitable for precision positioning and repeatable rotary movement.
Customization available: Accuracy grade, preload, clearance, grease, marking and packaging can be adjusted.
Typical Applications
RB2508 is commonly used in compact precision equipment where space saving, smooth rotation and stable support are required.
Small industrial robot joints
Compact rotary tables
Precision indexing mechanisms
Optical inspection equipment
Measuring instruments
Semiconductor automation equipment
Medical and laboratory devices
Small positioning stages
Precision fixtures and rotary support units
Selection Notes
RB2508 is suitable when the design requires a compact cross roller bearing and the inner ring rotation accuracy is important.
If a thinner and lighter structure is needed, RA series may be considered.
If the outer ring is the main rotating part, RE series may be more suitable.
If direct mounting holes are required, RU series may be more convenient.
For replacement projects, please confirm the dimensions, accuracy grade, preload or clearance, sealing condition, lubrication method and working load before ordering.
Customization and Quality Control
LYDL can provide RB2508 cross roller bearings for prototype testing, small-batch trial orders and stable batch production. Available options include:
P5 / P4 / P2 accuracy grade
Preload or clearance adjustment
Open type or sealed type
Special grease
Laser marking
Anti-rust packaging
Inspection report according to order requirements
Before shipment, LYDL can check key items such as dimensional accuracy, appearance, rotation smoothness, preload condition, marking and packaging.
RB2508 cross roller bearing inspection and protective packaging at LYDL factory
Related Models
Customers interested in RB2508 may also check: RB2008, RB3010, RB4010, RB5013, RB6013, RB7013, RB8016 and RB10016 cross roller bearings. For more product options, please visit the RB Series Cross Roller Bearings category or contact LYDL with your required dimensions and application.
Information Needed for Quotation
To provide an accurate quotation for RB2508, please send us:
Required quantity
Accuracy grade
Open or sealed type
Preload or clearance requirement
Application or equipment type
Original bearing model or drawing
Destination country
Special requirements for grease, marking, packaging or inspection
FAQ
What is RB2508 cross roller bearing used for?
RB2508 is used for compact rotary mechanisms such as small robot joints, measuring instruments, optical inspection devices, positioning stages, automation equipment and precision fixtures.
What are the dimensions of RB2508?
The common dimensions of RB2508 are 25 mm inner diameter, 41 mm outer diameter and 8 mm width.
Can LYDL provide RB2508 with higher accuracy?
Yes. LYDL can provide RB2508 cross roller bearings with P5, P4 or P2 accuracy grades according to customer requirements.
Is RB2508 suitable for direct mounting?
RB2508 does not have mounting holes. If direct mounting holes are required, RU series cross roller bearings may be more convenient.
Can RB2508 replace imported cross roller bearings?
RB2508 can be used as a replacement reference for similar imported cross roller bearing models, but dimensions, accuracy grade, preload and application requirements should be confirmed before replacement.
Contact LYDL for RB2508 Cross Roller Bearing
Luoyang Deeplink Technology Co., Ltd manufactures RB2508 and other precision cross roller bearings for industrial robots, CNC machine tools, rotary tables, measuring instruments, semiconductor equipment, medical devices and precision automation systems.
If you need cross roller bearings, replacement support or custom precision bearing solutions, please contact LYDL with your model number, drawing or application details.
