RU Series Crossed Roller Bearings (Integrated inner/outer ring type, inner ring rotation / outer ring rotation, with mounting holes and high rigidity)

1. General Information

Structural features: The inner and outer rings form a one-piece integrated structure, both equipped with mounting holes, allowing installation without the need for separate fixing flanges or support housings. Supports either inner ring rotation or outer ring rotation, offering a high degree of flexibility.

Interchangeability: Can replace the THK RU series and IKO CRBF series crossed roller bearings.

Core attributes: High-precision, high-rigidity bearings developed for machinery requiring compact design and high rotational accuracy, delivering stable performance while simplifying installation.

2. Key Features

• Integrated design: The one-piece inner and outer ring structure simplifies the installation process (no additional fixing components required), minimizes the impact of installation on performance, and ensures high rotational accuracy and stability.

• Built-in mounting holes: Both the inner and outer rings feature mounting holes, enabling direct installation onto the application structure, eliminating the need for extra fixing or support components, saving space, and reducing installation cost and complexity.

• High rigidity and high torque capacity: Capable of handling complex load conditions including radial loads, axial loads, and tilting loads, making them suitable for precision rotating mechanisms.

• Wide application range: Thanks to their high rigidity and precision, they are suitable for industrial robots, rotary tables, medical equipment, machine tools, and other applications requiring precise control and compact design.

• Stable rotational accuracy: The integrated design and precision manufacturing process ensure a high level of rotational accuracy, maintaining stability even under high-speed rotation or load variations, safeguarding equipment performance.

3. Installation Steps

Preparations:

• Ensure the mounting surfaces are clean and flat. Remove debris and contaminants to prevent uneven loading or bearing damage.

• Check the dimensional accuracy and surface roughness of the bearing and mating components to confirm compliance with design specifications.

Inspect the bearing and mounting surfaces:

• Check the bearing for any damage incurred during transport or storage.

• Verify that the dimensions, shape, and positional accuracy of the mounting holes and bearing housing meet requirements.

Install the bearing:

• Gently position the bearing at the installation location and secure it directly by bolting through the built-in mounting holes.

• Use a torque wrench to gradually and evenly tighten the bolts in a cross-diagonal pattern to the specified torque values, preventing unbalanced installation.

Post-installation inspection:

• After installation, check that the bearing rotates smoothly without abnormal noise or vibration.

• Confirm there is no excessive preload or looseness.

4. Installation Precautions

• Cleanliness: Keep the bearing and installation environment clean to prevent contaminants such as dust and corrosive substances from affecting performance.

• Tool selection: Use appropriate tools and avoid using hammers or other tools that may damage the bearing.

• Even force application: The installation force must be applied evenly around the entire circumference of the bearing to prevent localized stress and deformation.

• Corrosion protection: In harsh environments, apply an appropriate amount of anti-rust oil or grease between the bearing and mounting surfaces.

• Avoid excessive preload: Preload must be appropriate; excessive preload can cause overheating, accelerated wear, or even bearing damage.

• Records and markings: Record the installation position, orientation, fasteners, and torque values to facilitate subsequent inspection and maintenance.

Proper installation is essential to ensuring the performance and extending the service life of RU series crossed roller bearings. Strict adherence to the above steps and precautions will ensure they achieve their intended performance.