XUT-C
Flexible coupling – Cross joint – type – Clamping type
Dimension Drawing
Dimensions/Specifications/CAD
| Part Number | A | L | W | E | F | G | M | Wrench Torque (N･m) |
|---|---|---|---|---|---|---|---|---|
| XUT-15C | 15 | 6 | 18 | 4 | 2.5 | 5.2 | M2 | 0.5 |
| XUT-20C | 20 | 7 | 20 | 7 | 2.7 | 6.5 | M2 | 0.5 |
| XUT-25C | 25 | 9 | 27 | 10 | 3.5 | 9 | M2.5 | 1 |
| XUT-30C | 30 | 9.5 | 30 | 10 | 4 | 10.5 | M3 | 1.5 |
| XUT-35C | 35 | 11.5 | 35 | 13 | 5 | 12.5 | M4 | 2.5 |
| XUT-40C | 40 | 12.5 | 40 | 15 | 5.5 | 15 | M4 | 2.5 |
| Part Number | Max. Bore Diameter (mm) | Rated Torque * (N・m) | Max. Torque* (N・m) | Max. Rotational (min-1) | Static Torsional Stiffness (N・m/rad) | Max. Lateral Misalignment (mm) | Max. Angular Misalignment (°) | Mass** (g) |
|---|---|---|---|---|---|---|---|---|
| XUT-15C | 6 | 0.3 | 0.6 | 42000 | 200 | 0.2 | 1 | 8 |
| XUT-20C | 8 | 0.6 | 1.2 | 31000 | 400 | 0.2 | 1 | 16 |
| XUT-25C | 12 | 1.2 | 2.4 | 25000 | 900 | 0.2 | 1 | 33 |
| XUT-30C | 14 | 2.4 | 4.8 | 21000 | 1300 | 0.2 | 1 | 53 |
| XUT-35C | 16 | 4 | 8 | 18000 | 2200 | 0.2 | 1 | 81 |
| XUT-40C | 20 | 6 | 12 | 15000 | 2300 | 0.2 | 1 | 120 |
*Adjustment of rated and max. torque specifications for load fluctuations is not required.
For more detailed information, please refer to Selection Guidelines [PDF 171KB].
**Based on the max. shaft bores.
| Part Number | Stock Bores D1-D2 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3 | 4 | 5 | 6 | 8 | 10 | 11 | 12 | 14 | 15 | 16 | 18 | 19 | 20 | |
| XUT-15C | ● | ● | ● | ● | – | – | – | – | – | – | – | – | – | – |
| XUT-20C | – | ● | ● | ● | ● | – | – | – | – | – | – | – | – | – |
| XUT-25C | – | – | ● | ● | ● | ● | ● | ● | – | – | – | – | – | – |
| XUT-30C | – | – | – | ● | ● | ● | ● | ● | ● | – | – | – | – | – |
| XUT-35C | – | – | – | – | ● | ● | ● | ● | ● | ● | ● | – | – | – |
| XUT-40C | – | – | – | – | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● |
●All products come with set screws.
●Recommended tolerance for shaft diameters is h6 and h7.
●Bore and keyway modifications are available on request. Please take advantage of our bore modification services.
For more information please refer to Custom Bore Modifications [PDF 495KB]
Material/Finish
| XUT-C | |
|---|---|
| Hub | A2017＊ |
| Spacer | SUS304 |
| Pin | SUJ2 |
| Bush | Polyimide |
| Hex Socket Head Cap Screw | SCM435 Ferrosoferric oxide film |
＊Manufacturing alumite treatment products is also possible. Please feel free to contact our customer service.
Structure
Clamping type
XUT-C XUT-C
The high accuracy fitting of pin and bush allows the extremely small backlash.
For the bush of XUT the polyimide resin with excellent abrasion-resistance is adopted.
The backlash at the initial stage is maintained for a long period.
Characteristics
- Applicable motors
XUT Servomotor ◎ Stepping Motor ◎ General-purpose motor ◎ ◎：Excellent ○：Very good
- Property
XUT Zero Backlash ○ High torque ○ High Torsional Stiffness ◎ Allowable Misalignment ○ Vibration absorption ◎ ◎：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.
Application
Actuator/XY stage/Index table
Selection
The area bounded by the shaft diameter and rated torque indicates is the selection size.
Selection example
In case of selected parameters of shaft diameter of φ 10 and load torque of 0.9 N•m, the selection size is XUT-25C
| Rated output （W） | Servomotor Specifications | Selection size | ||
|---|---|---|---|---|
| Diameter of motor shaft （mm） | Rated torque （N・m） | Instantaneous maximum torque （N・m） | XUT-C | |
| 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 | – |
＊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%.
XUT ’s change in torsional stiffness due to temperature is small and the change in responsiveness is extremely small. However, if the unit is used under higher temperature, be careful about misalignment due to elongation or deflection of the shaft associated with thermal expansion.
Eccentric Reaction Force
XUT has small eccentric reaction force and an extremely small shaft load generated by misalignment. This reduces the load to such components as shaft bearings.
