RU Series RU42 RU42UU RU42X RU42UUCC0P5 XRU2012 CRBF2012AT 20x70x12mm High Precision Robot Arm Cross Roller Bearing RU

The RU Series 20x70x12mm Cross Roller Bearing includes models RU42, RU42UU, RU42X, RU42UUCC0P5, XRU2012, and CRBF2012AT, designed for high-precision robot arm and automation applications.

This compact cross roller bearing features cylindrical rollers arranged alternately at 90°, allowing it to support radial loads, axial loads, and moment loads simultaneously. With a highly rigid integrated inner and outer ring structure, the RU42 series ensures stable rotation and accurate positioning in robotic joints and precision equipment.

The 20x70x12mm configuration is especially suitable for compact robotic systems where space saving and high precision are critical.

• Crossed cylindrical roller structure
• Supports radial, axial, and moment loads simultaneously
• Integrated ring design for improved rigidity
• Compact size: 20x70x12mm
• High precision grade (P5 optional)
• Smooth rotation and low friction
• Available in open and sealed (UU) versions

(Custom preload classes and marking available.)

• Product Type: Cross Roller Bearing
• Series: RU Series
• Size: 20 * 70 * 12 mm
• Precision Grade: P5 (customizable)
• Material: High-grade bearing steel
• Structure: Crossed cylindrical rollers
• Sealing: Open / Double sealed (UU)
• Application: Robot arms, rotary modules

The RU42 series cross roller bearing is widely used in:

• Industrial robot arm joints
• Robot wrist and elbow rotation
• Compact automation modules
• Precision rotary tables
• Harmonic and RV reducers
• Medical and semiconductor equipment

At GQZ Bearing, we supply precision robot bearings with stable performance and controlled manufacturing quality:

• Strict dimensional accuracy inspection
• Stable preload control for robotic applications
• Consistent batch quality
• OEM marking and packaging support
• Experience in robotics and automation export supply

• Anti-rust vacuum packaging
• Industrial export carton
• OEM packaging available
• Flexible MOQ support
• Air and sea freight options

The crossed roller arrangement allows the bearing to handle radial, axial, and moment loads at the same time, making it ideal for robotic arm joints that require high rigidity and precision.

RU42 is an open type, while RU42UU features double seals for improved dust protection and longer service life in enclosed robotic systems.

Yes. We can provide P5 precision grade and customized preload levels based on your robotic system requirements.