Cross Roller Bearings

CRBH Cross Roller Bearings

Meets Your Design Requirements

Integrated inner/outer ring structure: Eliminates assembly cumulative errors, enhancing system rigidity by 30%.Orthogonal roller symmetrical arrangement: Balances composite loads of radial/axial/moment forces.Ultra-thin section design: Minimum height of 8mm breaks spatial constraints for micro-devices.Precision raceway polishing (Ra≤0.1μm): Achieves ultra-low friction energy consumption.

Wide Range of Sizes & Precision Grades

Inner diameter span: 20-250mm.Section height: 8-25mm.Rotational accuracy: P5/P4/P2 grades.Sealing options: Open type/contact rubber seal (UU/U).

Multiple Material Options

Core materials:GCr15 high-carbon chromium steel ,SUS440C stainless steel.

Special customization:Ceramic roller hybrid solution Vacuum-grade special lubricants Composite cages (Nylon 66/Brass)

Delivery Time

Regular models: 72 hours.Customization: 7-25 days

Applications

Industrial robots, precision machine tools, medical equipment

Techspecs

Cross Roller Bearing CRBH Series
Shaft diameter (mm)Bearing ModelMain dimensionsMounting dimensions (mm)Basic dynamic load ratingBasic static load ratingWeight
(mm)
Open type with separatorTwo sides sealed type with separatorInner ring dOuter diameter DWidth BChamfer r(min)daDaCCo(Kg)
(N)(N)
20NB.CRBH 208ANB.CRBH 208A UU203680.32431291024300.04
25NB.CRBH 258ANB.CRBH 258A UU254180.32936312028100.05
30NB.CRBH 3010ANB.CRBH 3010A UU3055100.336.548.5760083700.12
35NB.CRBH 3510ANB.CRBH 3510A UU3560100.341.553.5790093100.13
40NB.CRBH 4010ANB.CRBH 4010A UU4065100.346.558.58610106000.15
45NB.CRBH 4510ANB.CRBH 4510A UU4570100.351.563.58860113000.16
50NB.CRBH 5013 ANB.CRBH 5013 A UU5080130.6567417.320.90.29
60NB.CRBH 6013 ANB.CRBH 6013 A UU6090130.6668418.824.30.33
70NB.CRBH 7013 ANB.CRBH 7013 A UU70100130.6769420.127.70.38
80NB.CRBH 8016 ANB.CRBH 8016 A UU80120160.68811232.143.40.74
90NB.CRBH 9016 ANB.CRBH 9016 A UU90130160.69812233.146.80.81
100NB.CRBH 10020 ANB.CRBH 10020 A UU100150200.611014050.972.21.45
110NB.CRBH 11020 ANB.CRBH 11020 A UU110160200.612015052.477.41.56
120HGCRBH 12025 ANB.CRBH 12025 A UU12018025113216873.41082.62
130NB.CRBH 13025 ANB.CRBH 13025 A UU13019025114217875.91152.82
140NB.CRBH 14025 ANB.CRBH 14025 A UU14020025115218881.91302.96
150NB.CRBH 15025 AHGCRBH 15025 A UU15021025116219884.31383.16
200NB.CRBH 20025 ANB.CRBH 20025 A UU20026025121224892.31694
250NB.CRBH 25025 ANB.CRBH 25025 A UU250310251.52622981022074.97


Description

The orthogonal arrangement of rollers forms a symmetrical contact line, evenly distributing radial, axial, and moment loads. The integral design of inner and outer rings reduces cumulative assembly errors and enhances system rigidity. Performance Features: Ultra-thin Cross-section: With a minimum cross-section height of 8mm, it suits the space constraints of micro devices. Low Friction: The roller end faces are precisely polished (Ra≤0.1μm), reducing energy consumption. Long Service Life: Surface hardening treatment of GCr15 material increases fatigue resistance by 30%. Customization Options: Support hybrid designs with ceramic rollers, non-standard sizes, and special lubricants for vacuum environments.
CRBH Cross Roller Bearings

Features

Composite Load Capacity

A single bearing can simultaneously bear radial, axial, and moment loads, reducing system complexity.

Ultra-high Rigidity

The orthogonal roller layout enhances the anti-deformation capacity by 3 to 4 times, making it suitable for high-torque scenarios.

Precision Rotation

With P4-class accuracy, it meets micron-level positioning requirements (e.g., alignment mechanisms of lithography machines)

Lightweight Design

The nylon cage and thin-walled structure reduce overall weight, making it suitable for mobile devices.

Working Principle

CRBH Cross Roller Bearings
Roller Arrangement and Load Distribution: Orthogonal and crosswise rollers form an “X”-shaped contact line, evenly dispersing radial and axial forces. Moment loads are transmitted through diagonal rollers, reducing local stress concentration. Lubrication and Sealing: Double Seals (UU/U): Protect against dust and liquid intrusion, suitable for complex industrial environments. Thermal Management: The low-friction design reduces temperature rise (typical temperature rise ≤ 15°C), ensuring the thermal stability of precision instruments. Installation Compatibility: The integral structure of the inner and outer rings simplifies the installation process and is compatible with interference fits (shaft h6/housing bore H7).

Application & Case

Industrial robots: Micro robotic arm joints, collaborative robot drive units.

Precision machine tools: High-speed spindle supports, miniature CNC rotary tables.

Medical equipment: Endoscope rotation mechanisms, portable diagnostic instruments.

Semiconductor manufacturing: Wafer inspection equipment rotating shafts, lithography machine micro-motion platforms.

FAQ

The CRBH type features an integral design for both the inner and outer rings, which is suitable for more compact spaces. The RB type has a split outer ring, which makes preload adjustment convenient.
Grease lubrication is suitable for regular working conditions. Oil lubrication is used for ultra-high-speed scenarios ( > 3,000 rpm) or heavy-load situations.
Yes, it does. SUS440C material, dry film lubricating grease, and degassing treatment process are required.
It is usually 6 to 10 weeks. Specifically, it needs to be determined according to the design complexity and the availability of materials.

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Luoyang City, Henan, China

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