RA crossed roller bearing

Design Principle: The rollers are arranged orthogonally at 90°, and the inner and outer rings feature an integrated track design, enabling the uniform distribution of radial, axial, and moment loads. Performance Features: High Rigidity: The crossed-roller layout maximizes the contact area, reducing deformation. High Rotational Precision: The precisely ground tracks match the rollers, with a run-out tolerance of ≤ 0.002 mm. Low Friction: The geometric shape of the roller end faces is optimized to reduce sliding friction. Customization Options: Special lubricating greases (for high-temperature/vacuum environments), non-standard dimensions, and hybrid designs with ceramic rollers are supported. Roller Arrangement and Load Distribution: The rollers are arranged orthogonally to form an "X"-shaped contact line, evenly dispersing radial and axial forces. Moment loads are transmitted through the diagonal contact of the rollers, reducing local stress concentration. Lubrication and Sealing: Grease Lubrication:Long-acting lubricating grease (such as Krytox®) is suitable for high-temperature or vacuum environments. Oil Lubrication: A circulating oil system is used for ultra-high-speed or heavy-load scenarios. Sealing Design: A double-seal structure (UU/U) protects against the intrusion of dust and liquid. Thermal Management: The low-friction design reduces temperature rise, meeting the thermal stability requirements of precision instruments.

Cross Roller Bearings operate on the principle of crossed roller arrangement, where cylindrical rollers are arranged at 90° angles to each other. This unique design allows the bearing to support radial, axial, and moment loads simultaneously. The rollers are separated by spacers or cages to ensure even load distribution and reduce friction. The thin-section design of these bearings allows for compact and lightweight machinery, making them ideal for applications with space constraints.