RU Series Crossed Roller Bearings

The RU series crossed roller bearings are one of the models in the crossed roller bearing family. This series features cylindrical rollers arranged perpendicular to each other on cage‑supported raceways with 90° V‑shaped grooves. It offers advantages such as high load capacity, compact dimensions, high rigidity, and excellent precision. The bearings are equipped with mounting holes, eliminating the need for support housings or flanges for fixation while maintaining installation accuracy.

The RU series crossed roller bearings are one of the models in the crossed roller bearing family. This series features cylindrical rollers arranged perpendicular to each other on separator blocks, rolling along 90-degree V-shaped raceways. It offers advantages such as high load capacity, compact dimensions, high rigidity, and high precision. The bearings come with mounting holes, eliminating the need for support housings or flanges for fixation while maintaining installation accuracy.

RU-series crossed roller bearings are widely used in equipment such as precision machine tools, machining centers, industrial robots, and precision worktables.

I. Features of the RU Series Crossed Roller Bearings

1. Easy to use

The RU series crossed roller bearings feature a separable inner or outer ring, making installation and removal straightforward and enhancing ease of use.

2. Low coefficient of friction

RU-series crossed roller bearings feature a low coefficient of friction, enabling superior performance at high speeds, with a maximum speed approaching that of deep-groove ball bearings.

3. High radial load-carrying capacity

The RU series crossed roller bearings offer high radial load capacity, making them suitable for equipment that must withstand heavy loads and significant impact loads.

4. Requires a high-quality shaft or housing bore.

RU-series crossed roller bearings, due to the relative misalignment of the outer ring axis after installation, require shafts or housing bores with high machining accuracy to prevent stress concentration at the contact interface.

5. High adaptability

RU-series crossed roller bearings can accommodate changes in the relative position between the shaft and housing caused by thermal expansion or installation errors, making them well suited for applications such as free-end support.

II. Precautions for Using RU-Series Crossed Roller Bearings

1. Keep it clean

It is important to keep RU-series crossed roller bearings and their surrounding environment clean. Even minute dust particles that are invisible to the naked eye can adversely affect the bearing’s high-precision performance. Therefore, maintain regular cleanliness to minimize dust ingress into the bearing.

2. Use with caution

If RU-series crossed roller bearings are subjected to severe impacts during operation, they may develop surface damage and indentations, creating potential risk factors that could lead to accidents. In severe cases, the bearings may even crack or fracture outright; therefore, extra care should be taken during use.

3. Operating Tools

To prevent damage to RU-series crossed roller bearings caused by the use of unsuitable tools, proper tools should be employed and operations performed in accordance with established procedures.

4. Pay attention to rusting.

When handling bearings, sweat on your hands can also contribute to rusting. Therefore, be sure to clean your hands first, or wear gloves whenever possible.

III.

Application range of RU-series crossed roller bearings:

Large and medium-sized electric motors, locomotives and rolling stock, machine tool spindles, internal combustion engines, generators, gas turbines, gearboxes, rolling mills, vibrating screens, and lifting and conveying machinery, among others.

Product Specifications

 

RU Series Crossed roller bearing Model Specifications
Model	Main Dimension						Basic rated Loading		Weight
	inner	outer	diameter	width	Oil hole	r min	(KN)Radial		Kilogram
	d	D	dp	B, B1	d1		C	Co
RU 42	20	70	41.5	12	3.1	0.6	7.35	8.35	0.29
RU 66	35	95	66	15	3.1	0.6	17.5	22.3	0.62
RU 85	55	120	85	15	3.1	0.6	20.3	29.5	1
RU 124(G)	80	165	124	22	3.1	1	33.1	50.9	2.6
RU 124X
RU 148(G)	90	210	147.5	25	3.1	1.5	49.1	76.8	4.9
RU 148X
RU 178(G)	115	240	178	28	3.1	1.5	80	135	6.8
RU 178X
RU 228(G)	160	295	227.5	35	6	2	104	173	11
RU 228X
RU 297(G)	210	380	297.3	40	6	2.5	156	281	21
RU 297X
RU 445(G)	350	540	445.4	45	6	2.5	222	473	35
RU 445X