Dimension Drawing

Dimensions/Specifications/CAD

* Correction of rated torque and max. torque due to load fluctuation is not required. However, if ambient temperature exceeds 30°C, be sure to correct the rated torque and max. torque with temperature correction factor shown in the following table. XGS’s allowable operating temperature is -20°C to 80°C.
** These are values with max. bore diameter.

All products are provided with hex socket set screw.
In a case where the bore diameter is φ 4 or less, the setscrew is used in only one place.
Recommended dimensional allowances of applicable shaft diameter are h6 and h7.

Material/Finish

Structure

Set Screw Type

XGT Standard type XGT-C
XGS Short type XGS-C

Single Clamping Type

XGT-CS Standard type XGT-C
XGS-CS Short type XGS-C

Double Clamping Type

XGT-C Standard type XGT-C
XGL-C Long type XGL-C
XGS-C Short type XGS-C

Split-type

Easy to mount and remove screws.

Internal Structure

The designed shape of vibration-absorbing rubber achieved high torsional stiffness and high torque according to the newest fi nite element method. This product also succeeds in elongating its life by evenly dispersing the stress focusing on around the inner diameter of the jaw throughout the entire jaw.

Characteristics

• Applicable motors
  

  	XGT/XGL/XGS
  Servomotor	◎
  Stepping Motor	◎
  General-Purpose Motor	◎

  ◎: Excellent ○: Very good

• Property
  

  	XGT/XGL/XGS
  Zero Backlash	◎
  For servomotor high gain	◎
  High Torque	◎
  High Torsional Stiffness	○
  Allowable Misalignment	○
  Vibration absorption characteristics	◎
  Allowable Operating Temperature	-20℃ to 80℃

  ◎: Excellent ○: Very good

• This is a rubber high gain type flexible coupling optimized for actuators.
• Enables you to make high precision positioning in a short time.
  
• This is a single-piece construction with the two aliminum hubs molded with vibration absorbing rubber.
• About high-gain rubber coupling and reduction of stabilization time

Application

Actuator / Surface-mount machine / High precision 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 φ19 and load torque of 7 N•m, the selection size is XGT-39C.

＊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.

Ambient Temperature / Temperature Correction Factor

Thrust Reaction Force

This is a force generated when compressing XGT,XGL,XGS in the shaft direction. As the thrust reaction force becomes smaller, the force acting on the motor also becomes smaller.

Slip Torque

Concerning the sizes shown in the table, please note that the shaft’s slip torque is smaller than the max. torque of XGT-C,XGS-C,XGL-C.

These are test values based on the condition of shaft’s dimensional allowance: h7, hardness: from 34-40 HRC, and screw tightening torque of the values described in XGT-C,XGS-C,XGL-C dimensional table.

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 torsional stiffness within the range of allowable operating temperature is as shown in the graph.
Before using the unit, be aware of the deterioration of responsiveness.

Eccentric Reaction Force

This is a force generated when making XGT,XGL,XGS in eccentric condition. As the eccentric reaction force becomes smaller, the force acting on the shaft bearing also becomes smaller.

Download PDF Catalog1

Download PDF Catalog2

Download PDF Technical Data