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RU Crossed Roller Bearings RU178

The RU178 is a crossed roller bearing with a 115mm bore and 240mm outer diameter, designed for combined loads. Its single-row construction and steel rollers provide a basic load rating of 80.3 kN, making it sturdy for heavy-duty use.

The open design allows easy lubrication, with greasing holes for maintenance. Mounting holes (12-M8 inner, 12-φ9 outer) simplify installation, while the press-fit shaft mount ensures stability.

This bearing operates in temperatures from 0°C to 110°C and meets ABEC5 standards (higher grades available). Ideal for precision equipment like robotics or machine tools where space and accuracy matter.

Weighing 6.8kg, it’s robust yet manageable. Compliant with RoHS and REACH for safe industrial use.

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Description

Features

Application

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Product Parameters

Part Number RU178
Brand TFL
Size 115 mm x 240 mm x 28 mm
Bore Dia 115 mm
Outer Dia 240 mm
Width 28 mm
System of Measurement Metric
Bearing Type Roller
Roller Bearing Type Crossed
For Load Direction Combined
Construction Single Row
Seal Type Open
Inner Ring PCD1 139 mm
Outer Ring PCD2 217 mm
Greasing Hole(d1) 3.1 mm
R(min) 1.5 mm
Shoulder Height Ds(max) 161 mm
Shoulder Height Dh(min) 195 mm
Holes With Holes
Inner Ring Mounting Hole 12-M8 through
Outer Ring Mounting Hole 12-φ9 through φ14 counter bore depth 13.5
Ring Material Steel
Roller Material Steel
Basic Load Rating C 80.3 kN
Basic Load Rating Co 135 kN
Lubrication Required
Shaft Mount Type Press Fit
Temperature Range 0 -230 °F
ABEC Rating ABEC5(Available in ABEC7/9)
RoHS Compliant
REACH Compliant
Weight 6.8 Kg

Features

How Does RU178 Bearing Handle Combined Loads?

RU178 Bearing features a crossed roller design, providing stability under combined loads.
Its steel rings and rollers ensure durability, with a basic load rating of 80.3 kN.

The open construction allows for easy lubrication, maintaining smooth operation.
With mounting holes included, RU178 Bearing simplifies installation and alignment.

RU178 Bearing operates in temperatures from 0 to 230°F, suitable for various industrial conditions.
Its ABEC5 rating ensures precision, with options for higher accuracy in ABEC7/9.

Application

Industrial Uses of RU178 Bearing
RU178 Bearing is commonly used in machine tools, where its crossed roller design provides excellent rigidity and precision for rotary tables. The open seal type allows for easy lubrication, ensuring long service life in demanding conditions.

In robotics, RU178 Bearing supports articulated arms, offering smooth rotation under combined loads. Its steel construction and ABEC5 rating make it reliable for high-precision movements in automated systems.

For medical imaging devices, RU178 Bearing’s press-fit mounting simplifies installation while maintaining accuracy. The through holes in both rings allow for secure fastening, essential in vibration-sensitive applications.

RU178 Bearing also fits well in packaging machinery, where its load capacity handles the dynamic forces of conveyor systems. The grease holes ensure consistent performance even during prolonged operation.

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