RAU20013 Ultra-thin Cross Roller Bearing Integrated Inner and Outer Ring

Structural Features

Integrated Inner and Outer Ring Structure: The RAU series features an integrated inner and outer ring design, supporting both inner ring rotation and outer ring rotation. Compared with RB series bearings featuring a split outer ring, this structure provides greater flexibility for different installation configurations.
Ultra-Thin Cross-Section and Lightweight Design: The cross-sectional area is reduced by 57% compared with the conventional RA series. With a thickness of only 13 mm and a weight of approximately 0.71 kg for a 200 mm bore size, the bearing meets the requirements of lightweight equipment and installations in confined spaces.
Orthogonal Cross Roller Arrangement: The rollers are arranged at 90° intervals within the V-shaped raceway. A single bearing can simultaneously withstand radial forces, bidirectional axial forces, and overturning moments, simplifying the structure of rotary mechanisms.
Bearing Body Without Mounting Holes: The bearing body is not equipped with mounting holes. It is secured axially using end covers and clamping plates, allowing customers to design installation structures according to their specific requirements.

Model Suffix Specifications

The complete model consists of the basic model number and optional suffixes, which can be selected according to application requirements:

• UU: Seals on both sides (e.g., RAU20013UU)
• CC0: Preloaded condition (negative internal clearance)
• C0: Standard internal clearance
• P0 / P6 / P5 / P4 / P2: Accuracy grades. The smaller the grade number, the higher the rotational accuracy.
  Example: RAU20013UUCC0P5 indicates a bearing with seals on both sides, a preloaded condition, and P5 accuracy.
  
  

Applications of RAU20013 Bearings

RAU20013 is suitable for precision rotary components subject to strict space and weight constraints, including:

• Robotics: Lightweight robot joints, collaborative robots, and rotary joints for humanoid robots.
• Precision Rotary Platforms: Direct-drive (DD) motors and hollow rotary platforms.
• Reducer Assemblies: Harmonic drive reducers and planetary gear reducers.
• Precision Inspection Instruments: Medical equipment, optical instruments, and precision measuring instruments.
• Industrial Rotary Tables: CNC indexing tables and precision positioning platforms.