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GermanCrossed roller bearings arrange cylindrical rollers at 90-degree alternating angles in V-shaped raceways, with each roller making line contact across both inner and outer rings. This configuration allows a single bearing to support radial loads, axial loads in both directions, and overturning moment loads simultaneously — a capability that normally requires multiple bearing sets. The result is three to five times the moment stiffness of an equivalent ball bearing.
Yuanhe specializes in RAU series crossed roller bearings. The RAU design features integrated inner and outer rings — a one-piece construction with no split rings — which simplifies mounting, improves structural rigidity, and eliminates the assembly clearance issues common in split-ring designs. Rollers are packed at high density into the V-groove raceway, secured by a spacer retainer, and delivered with factory-set preload. No field adjustment is needed. The integrated-ring architecture delivers consistent preload and runout accuracy from the first installation.
Available from 20mm to 350mm bore, with standard precision grades P5, P4, and P2. The thin rectangular cross-section keeps overall height to a minimum, making RAU bearings the specified choice for semiconductor wafer handlers, medical CT and MRI gantries, precision rotary measurement stages, and industrial robot joints where axial space is the binding constraint. Materials are GCr15 bearing steel through-hardened to HRC 60-64, with stainless steel for corrosive environments. Every bearing ships with dimensional inspection data: bore tolerance, radial runout, and assembly height verified at four quadrant positions.
Designs And Variants
RAU series: integrated inner and outer rings, spacer retainer, thin rectangular cross-section. Bore range 20mm to 350mm. Core product line for precision rotary applications where mounting simplicity and consistent preload matter.
