RU Series Crossed Roller Bearings

Technical Principles and Performance
As a high-precision crossed roller bearing, its internal structure consists of cylindrical rollers arranged perpendicularly to each other in 90° V-grooves, separated by spacers. This unique design allows it to simultaneously withstand multi-directional composite loads, including radial, axial, and torque loads.
·High Rigidity & Compactness: The bearing's inner and outer ring dimensions are extremely miniaturized, with an ultra-thin design approaching physical limits, while maintaining exceptionally high rigidity. Rotational accuracy reaches P5, P4, and P2 grades.
·Smooth Low Torque: The spacers between the rollers effectively prevent tilting and mutual friction, significantly reducing rotational torque and avoiding the single-sided contact or jamming of rollers that can occur with traditional plate retainers.
·Precision Adjustable: The split inner ring (or outer ring) design allows for precise adjustment of bearing clearance. High-precision rotational motion is maintained even under preload.
·Easy Installation: The split ring, rollers, and retainer are pre-assembled and fixed at the factory to prevent separation, greatly simplifying on-site installation.
·Performance Comparison: Compared to traditional models, the RU series bearings, with their cross-arranged rollers, can withstand loads in all directions with a single bearing set, increasing rigidity by 3 to 4 times.

Typical Applications 
This series of bearings is widely used in equipment with extremely high requirements for precision, rigidity, and reliability, such as:
·Industrial Robots: Critical joints such as the waist and elbow
·Precision Machine Tools: Machining center rotary tables, precision indexing plates
·Medical Devices: CT scanning equipment, surgical robots
·Measurement and Inspection: Precision measuring instruments, optical platforms
·Defense and Aerospace: Radar antennas, satellite communication devices
·Semiconductor Manufacturing: IC manufacturing equipment, wafer processing equipment