• Couplings
  • Cross Joint Type


Flexible Couplings - Cross Joint Type - Clamping Type

  • High torsional rigidity
  • Vibration absorption characteristics
  • Small Eccentric Reaction Force

Dimension Drawing

XUT-CFlexible Couplings - Cross Joint Type - Clamping Type寸法図

Part Number ABLWEFGM Screw Tightening
Torque (N・m)
Add to Cart
XUT-40C-8-14 40 42 12.5 40 15 5.5 15 M4 2.5 182.21 CAD Cart

Part Number Max. Bore Diameter
Max. Rotational Frequency
Moment of
Max. Lateral Misalignment
Max. Angular
(g) *2
XUT-40C-8-14 20 6 15000 2.6×10-5 2300 0.2 1 120

*1: Correction of rated torque due to load fluctuation is not required. For more detailed information, please refer to Selection Guidelines.
*2: These are values with max. bore diameter.


Clamping Type


XUT-C_CFlexible Couplings - Cross Joint Type

The high accuracy fitting of pin and bush allows the extremely small backlash.
For the bush of XUT, a polyimide resin with excellent abrasion-resistance is adopted.
The backlash at the initial stage is maintained for a long period.

XUT-C_CFlexible Couplings - Cross Joint Type


Hub A2017*1
Spacer SUS304
Pin SUJ2
Bush Polyimide
Hex Socket Head Cap Screw SCM435
Ferrosoferric Oxide Film (Black)

*1: Anodized products are also available. Please contact our customer service.


  • Recommended Applicable Motor
Stepping Motor
General-purpose Motor

◎: Excellent ○: Very good ●: Available

  • Property
Zero Backlash
High Torque
High Torsional Stiffness
Allowable Misalignment
Vibration Absorption Characteristics

◎: Excellent ○: Very good

  • This is a cross joint type flexible coupling.
  • Slippage of the bush built in the hubs and the pins of the spacer allows eccentricity and angular misalignment to be accepted.
  • The high accuracy fitting of pin and bush allows the extremely small backlash.
  • The load on the shaft generated by misalignment is small and the burden on the shaft is reduced.


Actuator / XY stage / Index table


Selection Based on Shaft Diameter and Rated Torque

The area bounded by the shaft diameter and rated torque indicates the selection size.

XUT-C_CFlexible Couplings - Cross Joint Type

Selection Example

In case of selected parameters of shaft diameter of φ 10 and load torque of 0.9 N•m, the selected size is XUT-25C

Selection Based on the Rated Output of the Servomotor

Rated Output
Servomotor Specifications*1 Selection Size
Diameter of Motor Shaft
Rated Torque
Instantaneous Max. Torque
10 5 - 6 0.032 0.096 XUT-15C
20 5 - 6 0.064 0.19 XUT-15C
30 5 - 7 0.096 0.29 XUT-20C
50 6 - 8 0.16 0.48 XUT-20C
100 8 0.32 0.95 XUT-25C
200 9 - 14 0.64 1.9 XUT-30C
400 14 1.3 3.8 XUT-35C
750 16 - 19 2.4 7.2 -

*1: Motor specifications are based on general values. For details, see the motor manufacturer's catalogs. This is the size for cases where devices such as reduction gears are not used.

Change in static torsional stiffness due to temperature

This is a value under the condition where the static torsional stiffness at 20°C is 100%.
The change of XUT-C in torsional stiffness due to temperature is small and the change in responsiveness is extremely small. If the unit is used under higher temperature, be careful about misalignment due to elongation or deflection of the shaft associated with thermal expansion.

XUT-C_TTechnical Information

Eccentric Reaction Force

XUT-C has small eccentric reaction force and an extremely small shaft load generated by misalignment. This reduces the load to such components as shaft bearings.

XUT-C_TTechnical Information

Related Services

Product List

Click here to see XUT-40C

Click here to see XUT-C

Most Read