Precision cross roller bearings

RAU and RA series crossed roller bearings feature ultra-thin lightweight designs with rollers arranged alternately at 90°, supporting radial, axial, and tilting moment loads in a compact package. Available in open and sealed (UU) configurations, with inner diameters from 10mm to 200mm. These bearings deliver high rigidity, rotational accuracy, and space-saving installation, ideal for robot joints, manipulator arms, rotary tables, and precision automation equipment.

RAU series – integral inner and outer rings, supports inner or outer ring rotation, ultimate compactness.

RA series – split outer ring with integral inner ring, easy installation, ideal for manipulator arms and rotary tables.

CRBT series crossed roller bearings are ultra-compact, ultra-thin lightweight crossed roller bearings with integral inner and outer rings. Cylindrical rollers are arranged alternately at 90°, enabling a single bearing to simultaneously support radial loads, bidirectional axial loads, and tilting moment loads. Compared with the CRBS (RA type), the thickness is significantly reduced with a cross-section width of only 5mm, offering lighter weight, minimal space occupation, and ultimate lightweight construction.

The raceways are manufactured with ultra-precision grinding, achieving accuracy grades up to P4/P2, with controllable rotational clearance and stable friction torque. Rigidity is superior to thin-section ball bearings of the same size. Materials are available in GCr15 bearing steel or 440C stainless steel, with open or sealed configurations.

Widely used in small collaborative robot joints, humanoid robot gimbals, medical imaging equipment, miniature harmonic drive modules, surveillance turntables, precision inspection instruments, and other compact, lightweight precision rotating mechanisms. They are ideal as core support bearings for miniature, high-precision, compact equipment.

CRBTF series crossed roller bearings are ultra-slim, lightweight bearings with a width of just 5mm, featuring mounting holes on both the inner and outer rings. The cylindrical rollers are arranged alternately at 90°, enabling a single bearing to support radial, axial, and tilting moment loads simultaneously. Available in open configurations only, with inner diameters ranging from 10mm to 40mm. These bearings deliver exceptional rigidity (3-4 times that of ball bearings), high rotational accuracy, and significant weight savings, making them ideal for industrial robot joints, collaborative robots, medical equipment, and compact automation applications.