RA5008C Lightweight Precision Slewing Support Cross Roller Bearing

Features and Advantages

Ultra-Thin and Compact Design: The XRA-C series features extremely thin inner and outer rings, resulting in a slimmer and lighter structure than the XRB series. While maintaining load-carrying capability, the bearing minimizes its own weight, making it suitable for installations with strict space and weight constraints.

Single-Split Outer Ring Structure: Unlike the transversely split outer ring of the XRA series, the XRA-C series adopts a longitudinal single-split design secured with rivets. This structure provides high outer-ring rigidity and supports applications involving either inner-ring rotation or outer-ring rotation.

Multi-Directional Load Capacity and High Rigidity: Inheriting the core advantages of cross roller bearings, the rollers are arranged alternately at 90° angles. A single bearing can simultaneously accommodate radial loads, axial loads, and overturning moments. Its integrated load-bearing capability and overall rigidity offer advantages over conventional arrangements using multiple bearings.

Applications

With its ultra-thin profile, lightweight construction, and high rigidity, the RA5008C is suitable for precision rotary support applications where installation space and weight are critical considerations.

• Robotics: Joints and rotary support components in industrial robots, collaborative robots, service robots, and humanoid robots.
• Precision Equipment: Medical equipment, measuring instruments, radar and communication equipment, and pan-tilt rotary mechanisms.
• Other Machinery: Robotic arm rotary joints and precision rotary tables.
  
  

Installation and Usage Precautions

Do Not Disassemble: The outer ring is secured by special rivets and must not be disassembled for use. Incorrect reassembly of the cage or spacers can directly impair the bearing’s rotational performance.

Clean Before Installation: Thoroughly clean the bearing housing, shaft, and all associated mounting components to remove burrs, oil residues, and contaminants.

Install Smoothly and Evenly: Thin-section bearings are particularly susceptible to tilting during installation. Keep the bearing level during assembly and use a plastic mallet to apply light, even impacts around the circumference until the bearing is fully seated against the locating surface.

Select the Appropriate Rotation Configuration: For applications requiring high rotational accuracy, inner-ring rotation is generally preferred. Outer-ring rotation is also possible, but its precision performance may be lower than that of an inner-ring rotation arrangement.

Lubrication Information: Bearings are generally supplied with grease pre-filled. The UU suffix in model XRA5008CUU indicates that the bearing is equipped with seals on both sides.