RU28 Crossed Roller Bearing Specifications:

Check more RU series crossed roller bearings.

RU28 crossed roller bearing features:

1. Customized bearing size, equivalent to CRBF108AT bearing.
2. Integrated inner ring and outer ring, provide high stiffness.
3. Sustain radial, axial and moment loads at the same time.
4. High rigidity and rotation accuracy, compact structure reduce the influence by installation.
5. Miniaturization. Inner ring and outer ring with mounting holes, so it can be easily mounted to a device with bolts without need for housing and fixing plate. Which can simplify the design and reduce the total weight of the devices.

FAQ

1. Which precision grade shall I select?
There are mainly three precision grade for RU series crossed roller bearing, P5, P4 and P2. Users can select based on their actual application and requirements. If you are not sure how to choose, don’t hesitate to contact us, our engineers will offer you suggestions.

2. Which clearance shall I select? CC0 or C0?
RU42 CC0 radial clearance is -0.01~0mm, while C0 radial clearance is 0~0.025mm. Generally speaking, when high accuracy(runout) and high stiffness is required, negative clearance CC0 is suggested. When the temperature difference between inner and outer ring is large, or a lower friction torque is required, C0 clearance is more appropriate.

RU28 crossed roller bearing installation instructions

RU28 Bearing Mounting Holes

Shoulder height

ds: 24mm

Dh: 29.5mm

PCD1 : 16mm

PCD2: 42mm

Inner ring mounting hole 4-M3 through

Outer ring mounting hole 6-φ3.4 drilled through, φ6.5 counter bore depth 3.3

Cautions: For crossed roller bearings with split outer ring, when the rigidity of the mounting parts is not sufficient, stress concentration will occur at the contact area between the rollers and raceways, and the bearing performance will be deteriorated significantly.

Therefore, it is necessary to carefully examine the rigidity of housing and the strength of fixing bolts when a large moment will be applied.

1.Before installation, please clean bearing bracket, shaft, or other components, make sure there is no burrs or rough edge.
2.Fix the inner and outer rings in the axial direction directly to the mounting surface by fixing bolts
3. If large number of radial load and/or moment is applied, it is recommended to prepare flange part as Fig.4.