CRBT series

CRBT 705 Cross roller bearings

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CRBT 705 Cross roller bearings

Metric Dimensions (mm)
Bore d70mmBearing inner bore
Outer Dia. D81mmBearing outer diameter
Width B5mmBearing width
Structural Dimensions (mm)
Chamfer0.15r/minChamfer dimension
Roller Pitch Dia.74.7mmRoller pitch circle diameter
Shaft Shoulder ds72.5mmShaft shoulder diameter ds
Shaft Shoulder Dh77mmShaft shoulder diameter Dh
Radial Load (KN)
Dynamic Load Cr2.81KNBasic dynamic radial load rating
Static Load C0r4.68KNBasic static radial load rating
Other Parameters
Weight0.044kgBearing weight
CRBT 705 crossed roller bearing provides outstanding anti‑overturning‑moment performance under limited installation space. It realizes stable high‑accuracy rotary motion, bears radial, axial and overturning moment simultaneously. Frequently used for robot arm rotary units, radar rotary supports, medical rotary components and special compact precision devices.

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.

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