||Screw Tightening |
Torque (lbf in.)
|Standard Bore Diameter
D2 (Inertial Rotor Side)
|Add to Cart
● Specify the bore diameter in the order D1-D2 (inertial rotor side). Example: XGHW-27C-6-8J
● Append the identification code J after the bore diameter of D2 (inertial rotor side).
|Part Number||Max. Bore Diameter
|Max. Rotational Frequency
|Moment of |
|Max. Axial |
＊1： Correction of rated torque due to load fluctuation is not required.
The shaft's slip torque may be smaller than the coupling's rated torque depending on the shaft bore.＊2： These are values with max. bore diameter.
Slip torqueAs in the table below, the clamping type XGHW-C has different slip torque according to the bore diameter. Take care during selection.
|Outside Diameter||Bore Diameter (mm)|
Clamping Type XGHW-CXGHW-C
|Disk Fixing Bolt||SCM435
Ferrosoferric Oxide Film (Black)
|Hex Socket Head Cap Screw||SCM435
Ferrosoferric Oxide Film (Black)
Electroless Nickel Plating
- Recommended Applicable Motor
|High Torsional Stiffness||◎|
|Vibration Absorption Characteristics||◎|
|Allowable Operating Temperature||-10°C to 60°C|
- Flexible couplings with vibration absorption function added to high rigidity couplings.
- A structure with both high rigidity and vibration absorption. The individual dynamic vibration absorber＊1 is separate from the inertial rotor and elastic body in order to achieve vibration absorption.
＊1： The mechanism for suppressing resonant vibration phenomena is achieved by connecting the dynamic vibration absorber to the auxiliary inertial body via the elastic body.
- Does not use resin elastic materials for the rotation transmission system from the motor shaft hub to the driven shaft hub, for high rigidity.
- Achieves high positioning accuracy under high loads, in addition to high servomotor gain.
ApplicationActuator / Surface-mount machine / High precision XY stage / Index table
Precautions for UseWhen installing, be careful not to apply excessive torque, loads or forces to the inertial body. Doing so may result in the inertial body detaching.
Selection Based on Shaft Diameter and Rated TorqueThe area bounded by the shaft diameter and rated torque indicates the selection size.
Selection ExampleIn case of selected parameters of shaft diameter of φ14 and load torque of 3 N•m, the selected size is XGHW-41C.
Selection Based on the Rated Output of the Servomotor
|Servomotor Specifications＊1||Selection Size|
|Diameter of Motor Shaft
|Instantaneous Max. Torque
Eccentric Reaction Force
Thrust reaction force
Productivity and Stabilization TimeIn a production facility which uses servomotors, single-axis actuators and ball screws, the key to improved productivity is operating these components accurately, as directed by a program. However, occasionally the command execution may be delayed.
For example, when trying to stop the actuator at a predetermined position, sometimes it will stop later than the command, which we refer to as a delay in stabilization time. Since the operation does not shift to the next process until the actuator completely stops, it is important to shorten stabilization time and thereby improve productivity.
Gain and Stabilization Time of ServomotorThis shows how the servomotor gain movement follows the command.
Increasing the gain helps to reduce stabilization time, but increasing it too far causes hunting, making servomotor control impossible.
Increasing the gain while suppressing hunting requires fine adjustment of the servomotor parameters.
However, when a servomotor is combined with a coupling with a metal disk type in the elastic segment, raising the gain tends to cause hunting, making it difficult to resolve the problem by fine adjustments to parameters.
When hunting occurs, it is generally recommended to change to a coupling with higher rigidity to increase the rigidity of the rotating system.
However, in reality, it may not be effective to increase the rigidity of the entire rotating system including the ball screw simply by increasing coupling rigidity.
Change in static torsional stiffness due to temperatureThis is a value under the condition where the static torsional stiffness at 20°C is 100%.
The change of XGHW-C in torsional stiffness due to temperature is small and the change in positioning accuracy 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.