Cross Roller Bearing

RU Series Crossed Roller Bearing

RU series crossed roller bearing series integrated Inner/Outer Ring type. Since the mounting holes are provided, the model does not require a presser flange or housing. In addition, because it has an integrated inner/outer ring structure and is equipped with washers, its performance is minimally affected by the mounting procedure, ensuring stable rotation accuracy and torque. This model can be used for both inner-ring rotation and outer-ring rotation.

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RU Series Crossed Roller Bearing

RU series crossed roller bearing series integrated Inner/Outer Ring type. Since the mounting holes are provided, the model does not require a presser flange or housing. In addition, because it has an integrated inner/outer ring structure and is equipped with washers, its performance is minimally affected by the mounting procedure, ensuring stable rotation accuracy and torque. This model can be used for both inner-ring rotation and outer-ring rotation.

Surface treatment: surface black oxide-treated, phosphate treatment, zinc-plating, etc. to protect bearings from rust or corrosion.

RU Series Crossed Roller Bearing Parameters:

Model No. Outer dimension (mm) Installation dimension (mm) Rated load (Kn) Weight
d D B Rmin da Da C C0 kg
RU42 20 70 12 0.6 37 47 7.35 8.35 0.29
RU66 35 95 15 0.6 59 74 17.5 22.3 0.62
RU85 55 120 15 0.6 79 93 20.3 29.5 1
RU124(G) 80 165 22 1 114 134 33.1 50.9 2.6
RU124X 80 165 22 1 114 134 33.1 50.9 2.6
RU148(G) 90 210 25 1.5 133 162 49.1 76.8 4.9
RU148X 90 210 25 1.5 133 162 49.1 76.8 4.9
RU178(G) 115 240 28 1.5 161 195 80.3 135 6.8
RU178X 115 240 28 1.5 161 195 80.3 135 6.8
RU228(G) 160 295 35 2 208 246 104 173 11.4
RU228X 160 295 35 2 208 246 104 173 11.4
RU297(G) 210 380 40 2.5 272 320 156 281 21.3
RU297X 210 380 40 2.5 272 320 156 281 21.3
RU445(G) 350 540 45 2.5 417 473 222 473 35.4
RU445X 350 540 45 2.5 417 473 222 473 35.4

RU Series Crossed Roller Bearing Features:

1. Sustain radial, axial, and moment loads simultaneously.

2. High rigidity & running accuracy, being less subject to the mounting procedure. Bearings precision can reach P5/P4/P2 and even USP grade.

3. Space-saving. As face mount crossed roller bearing, RU series bearings can be bolted onto the equipment without housing or fixing plates.

4. Custom design cross roller bearing is also available.

RU Series Crossed Roller Bearing Application:

Waist joints of robots, rotary tables, radar, precision measuring instruments, precision turntables, hollow, rotating platforms, etc.

Crossed Roller Bearings vs. Ball Bearings

When we think of linear bearings, we usually think of equipment that includes ball bearings - this means that friction between moving parts is reduced by recirculating the ball. Bushing, ball splines, linear guides, and sliders usually contain recirculating ball bearings.

However, as the technology becomes more demanding and demands higher accuracy, the reliance on another type of linear bearing cross roller increases dramatically. Cross roller bearings can be found in various applications, including medical and laboratory equipment; Machine tool, semiconductor,s and electronic manufacturing; Clean the room and vacuum environment; Material handling, visual inspection, robotics and automatic machinery.

Cross roller bearings provide more accuracy, rigidity, and load-bearing capacity for linear motion than other commonly used friction-reducing devices such as ball bearings. Unlike ball bearings, they can withstand torque loads, radial forces, or inclined loads. This allows one crossed roller bearing to replace more than one ball bearing, thus saving the space required for ball bearings and reducing the associated material costs.

Selection of crossed roller bearing

Notes in use of crossed roller bearings:

The two-divided imner or outer ring fixed with special rivets or bolts and nuts inseparable. and should be diectly mounted into the bearing base for use. Meanwhile. if the spacer holder assembling sequenceis improper ,it will have a great impact on the rotation performance of the bearing.so,the bearing can not be disassembled freely.There is some deviation athe joint of inner or outer ring, before it is mounted into the bearing seat.the bolts to fix the imner or outer ring should be loosened to correct it with a plastic hammer. (the fixed rivets may be deformed with the bearing base deformation)Do not apply any extermal force onto the fixed rivets orbolts during the mounting or removal.

Please note the size tolerances of the mounting parts, and press securely the inner or outer ring with the flange from the side.

Lubrication for crossed roller bearing:

The crossed roller bearing has been filled with high quality 2# lithium grease, so it can be directly mounted for use. However. compared with common roller bearings it has a smaller intemal space. so the grease must be replenished periodically.

The grease should be replenished from the grease hole connected to the grease groove on the outer and inner rings. The grease replenishment interval is generally 6-12 months. The same grease must be replenished in all areas

Meantime, when the grease is filled fully,the initial rotation torque will be increased in a short ime due to the grease resistance;when the excess grease is spilled from the seal portions,it will soon be retumed to the normal torque value.