RU

The RU series crossed roller bearings consist of an integrated inner and outer ring design with mounting holes, eliminating the need for flanges and support seats during installation. The integrated structure of both rings ensures minimal impact on performance during installation, thereby maintaining stable rotational precision and torque. Suitable for applications requiring rotation of both the inner and outer rings, these bearings feature two rows of cylindrical rollers arranged in a 90-degree V-shaped groove with nylon separators, enabling them to withstand radial, axial, and moment loads from multiple directions. The compact dimensions of the inner and outer rings, coupled with an ultra-thin section approaching its limits, provide high rigidity, approximately 3-4 times that of traditional bearings. AUBEARING manufactures these crossed roller bearings with precision up to P2 grade and offers a minimum order quantity of 1 unit.Description

Part Number	Seal Type	Bore Dia	Outer Dia	Width	Ring Material	Weight
RU124	Open	80 mm	165 mm	22 mm	Steel	2.6 Kg
RU124UU	Sealed	80 mm	165 mm	22 mm	Steel	2.6 Kg
RU148	Open	90 mm	210 mm	25 mm	Steel	4.9 Kg
RU148UU	Sealed	90 mm	210 mm	25 mm	Steel	4.9 Kg
RU178	Open	115 mm	240 mm	28 mm	Steel	6.8 Kg
RU178UU	Sealed	115 mm	240 mm	28 mm	Steel	6.8 Kg
RU228	Open	160 mm	295 mm	35 mm	Steel	11.4 Kg
RU228UU	Sealed	160 mm	295 mm	35 mm	Steel	11.4 Kg
RU297	Open	210 mm	380 mm	40 mm	Steel	21.3 Kg
RU297UU	Sealed	210 mm	380 mm	40 mm	Steel	21.3 Kg
RU42	Open	20 mm	70 mm	12 mm	Steel	0.29 Kg
RU42UU	Sealed	20 mm	70 mm	12 mm	Steel	0.31 Kg
RU445	Open	350 mm	540 mm	45 mm	Steel	35.4 Kg
RU445UU	Sealed	350 mm	540 mm	45 mm	Steel	35.4 Kg
RU66	Open	35 mm	95 mm	15 mm	Steel	0.62 Kg
RU66UU	Sealed	35 mm	95 mm	15 mm	Steel	0.62 Kg
RU85	Open	55 mm	120 mm	15 mm	Steel	1 Kg
RU85UU	Sealed	55 mm	120 mm	15 mm	Steel	1 Kg

Showing 1 to 18 of 18 entries

Previous1Next

Customization Options:

Material: High-quality bearing steel, designated as GCr15 or GCr15SiMn.
Outer Diameter: From 70mm to 540mm.
Inner Diameter: From 20mm to 350mm.
Precision Level: P6, P5, P4, P2.
Sealing: Unsealed (no suffix), double-sealed (UU, seals on both sides), single-sealed on the side of the outer ring hole (U), and single-sealed on the opposite side of the outer ring hole (UT).
Clearance: Includes C2, CN, C3, C4.

Features:

Low Friction Coefficient: RU series crossed cylindrical roller bearings exhibit a low friction coefficient, suitable for high-speed applications approaching the limits of deep groove ball bearings.
High Radial Load Capacity: These bearings can withstand significant radial loads and are suitable for equipment requiring heavy and impact loads.
Requires High Precision Shaft or Housing: Due to potential misalignment after installation, RU series bearings require well-machined shafts or housings to prevent stress concentration.
Adaptability: They can accommodate variations in relative positions between shafts and housings due to thermal expansion or installation errors, making them ideal for applications such as supported free ends.

Installation Considerations:

Tolerance Control: After pressing the bearing onto the shaft, it should rotate freely without obstruction. Any noticeable resistance indicates the shaft size is too large, necessitating a reduction in tolerance.
Assembly Method: Given their high precision, improper assembly can damage the bearing's raceways. Specialized tools should be used during assembly, avoiding unnecessary force on the bearing.
Rotor Imbalance: During dynamic and static balancing of the rotor, precautions should be taken to prevent iron filings from entering the bearing, potentially causing damage.
Lubrication Control: While lubrication is essential for smooth operation, excessive grease in the bearing chamber can lead to complications during rotation. Careful control of lubrication quantities is recommended.

Crossed roller bearings in the RU series are available in a comprehensive range of configurations. For machine tools, large-scale robots, and general industrial equipment, the CRBH and CRBHV types, with both inner and outer rings integrated, as well as the CRB and CRBC types with split outer rings along the axial direction, are optimal choices. Small to medium-sized robot joints and semiconductor and electrical equipment benefit from the compact design of the thin-section CRBS, while ultra-thin CRBT models suit precision small-scale devices. Additionally, the high rigidity CRBF and CRBFV types simplify bearing seat structures and include mounting holes.

RU

Bearing Catalogue