RU178X crossed roller bearing detail specifications:

RU178X crossed roller bearing features:

1. Integrated inner ring and outer ring, provide high stiffness
2. Sustain radial, axial and moment loads at the same time
3. High rigidity & rotation accuracy, compact structure reduce the influence by installation
4. 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, so surrounding parts of the bearing can be made compact, which contributes to miniaturization and weight saving of devices.

Check more RU series crossed roller bearings.

FAQ

1. What’s the difference between RU178, RU178(G) and RU178X?
The suffix G/X refers to the detailed structure of mounting holes.
No Symbol: Inner ring is counter-bore hole and the counter bore holes of the inner and outer rings face the same direction
G : The counter-bore holes of the inner and outer rings face opposite direction.
X : Inner ring tapped hole (through hole)

2. What’s the difference between clearance CC0 or C0?
RU178X bearing CC0 radial clearance is -0.01~0mm, while C0 radial clearance is 0~0.05mm. 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.

3. What is the MOQ for this model RU178X?
There is no MOQ for bearing models in stock, and low MOQ for custom design. Please contact us for details.

RU178X crossed roller bearing installation instructions

RU178X Bearing Mounting Holes

Shoulder height

ds: 161mm

Dh: 195mm

PCD1 : 139mm

PCD2: 217mm

Inner ring mounting hole 12-M8 through

Outer ring mounting hole 12-φ9 drilled through, φ14 counter bore depth 8.6

Suffix X :Inner ring tapped hole (through hole)

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.