• Couplings
  • High Gain Rubber Type

XGS-CS

Flexible Couplings - High-gain Rubber Type (short) - Single Clamp Type

  • Zero Backlash
  • High gain supported
  • High Torque
  • Vibration absorption characteristics

Dimension Drawing

XGS-CSFlexible Couplings - High-gain Rubber Type (short) - Single Clamp Type寸法図

*1: E=D2+0.5(D2<5)

E=D2+1(D2≥5)

Specs/CAD

Unit : mm

Part Number A L W F G M Screw Tightening Torque
(N・m)
Standard Bore Diameter
D1-D2
CAD RFQ
XGS-15CS 15 6.5 18 2.15 5 M1.6 0.25 CAD RFQ
XGS-19CS 19 7.7 20 2.65 6.5 M2 0.5 CAD RFQ
XGS-25CS 25 9.5 27 3.25 9 M2.5 1 CAD RFQ
XGS-27CS 27 9.5 27 3.25 10 M2.5 1 CAD RFQ
XGS-30CS 30 11 30 4 11 M3 1.5 CAD RFQ
XGS-34CS 34 12 35 4 12.25 M3 1.5 CAD RFQ
XGS-39CS 39 15.5 40 4.5 14.5 M4 2.5 CAD RFQ

Part Number Max. Bore Diameter
(mm)
Keyway Additional Modification Max. Bore Diameter
(mm)
Rated Torque
(N・m)*1
Max. Rotational Frequency
(min-1)*1
Moment of
Inertia
(kg・m2)*2
Static
Torsional Stiffness
(N・m/rad)
Max. Lateral Misalignment
(mm)
Max. Angular Misalignment
(°)
Max.
Axial Misalignment
(mm)
Mass
(g)*2
XGS-15CS 6 - 0.5 42000 2.0×10-7 25 0.15 1.5 ±0.2 7
XGS-19CS 8 6 0.8 33000 5.7×10-7 63 0.15 1.5 ±0.2 11
XGS-25CS 12 9 2.3 25000 2.2×10-6 100 0.15 1.5 ±0.2 24
XGS-27CS 14 10 2.3 23000 3.0×10-6 120 0.15 1.5 ±0.2 27
XGS-30CS 15 11 3.3 21000 5.3×10-6 160 0.2 1.5 ±0.3 38
XGS-34CS 16 12 5.5 18000 9.9×10-6 350 0.2 1.5 ±0.3 58
XGS-39CS 20 15 7 16000 2.0×10-5 440 0.2 1.5 ±0.3 86

*1: Correction of rated torque due to load fluctuation is not required. If ambient temperature exceeds 30°C, be sure to correct the rated torque with temperature correction factor shown in the following table.

The allowable operating temperature of XGS-CS is -20°C to 80°C.

※ The shaft's slip torque may be smaller than the coupling's rated torque depending on the shaft bore. XGT-CXGL-C

*2: These are values with max. bore diameter.

Part Number Standard Bore Diameter D1・D2
XGS-15CS 3-5 3-6 4-4 4-5 4-6
4.5-5 5-5 5-6 6-6  
XGS-19CS 4-5 5-5 5-6 5-7 5-8
6-6 6-6.35 6-7 6-8 6.35-8
8-8        
XGS-25CS 5-6 5-8 6-6 6-8 6-10
6-11 6-12 6.35-8 6.35-10 8-8
8-10 8-11 8-12 10-10 10-12
12-12        
XGS-27CS 5-6 5-8 5-14 6-6 6-8
6-10 6-11 6-12 6-14 8-8
8-10 8-11 8-12 8-14 10-10
10-12 10-14 12-12 12-14 14-14
XGS-30CS 8-8 8-10 8-11 8-12 8-14
8-15 10-10 10-11 10-12 10-14
10-15 11-12 12-12 12-14 12-15
14-14 14-15 15-15    
XGS-34CS 8-8 8-10 8-11 8-12 8-14
8-15 10-10 10-11 10-12 10-14
10-15 11-11 11-12 12-12 12-14
12-15 14-14 14-15 15-15 16-16
XGS-39CS 10-10 10-12 10-14 10-15 10-16
12-12 12-14 12-15 12-16 12-19
12-20 14-14 14-15 14-16 15-15
15-16 15-19 16-16 17-17 20-20

● All products are provided with hex socket head cap screw.
● Recommended tolerance for shaft diameters is h6 and h7.
● In case of mounting on D-cut shaft, be careful about the position of the D-cut surface of the shaft. ⇒Mounting and Maintenance

Ambient Temperature / Temperature Correction Factor

Ambient Temperature Temperature Correction Factor
-20℃ to 30℃ 1.00
30℃ to 40℃ 0.80
40℃ to 60℃ 0.70
60℃ to 80℃ 0.55

Slip Torque

As in the table below, the clamping types XGT-C, XGT-CS, XGS-C, XGS-CS, and XGL-C have different slip torque according to the bore diameter. Take care during selection.
Outside Diameter Bore Diameter (mm)
3 4 4.5 5 6 6.35 7 8 10 11 12 14 15 16 17 19 20
15 1 1.3 1.5 1.7 1.9
19 2.2 2.7 3.1 3.3 3.8
25 4.3 5 5.5 6.8
27 3.8 5 6.8
30 7.5 10 12
34 8.3 10 10 12 13
39 13 15 17 18 18 23 25
44 16 19 20 21 23 25 27
56 45 50 61

These are test values based on the conditions of shaft dimensional allowance: h7, hardness: 34-40 HRC, and screw tightening torque of the values described in XGT-CXGT-CSXGS-CXGS-CSXGL-C dimension tables. They are not guaranteed values.
Slip torque changes with usage conditions. Carry out tests under conditions similar to actual conditions in advance.


Structure

Set Screw Type

XGT Standard typeXGT
XGS Short typeXGS

XGT-C/XGL-C/XGS-C_CFlexible Couplings - High-gain Rubber Type

Single Clamping Type

XGT-CS Standard typeXGT-CS
XGS-CS Short typeXGS-CS

XGT-C/XGL-C/XGS-C_CFlexible Couplings - High-gain Rubber Type

Double Clamping Type

XGT-C Standard typeXGT-C
XGL-C Long typeXGL-C
XGS-C Short typeXGS-C

XGT-C/XGL-C/XGS-C_CFlexible Couplings - High-gain Rubber Type

XGT-C XGL-C XGS-C Split Type

Easy to mount and remove screws.

XGT-C/XGL-C/XGS-C_CFlexible Couplings - High-gain Rubber Type

Internal Structure

XGT-C/XGL-C/XGS-C_CFlexible Couplings - High-gain Rubber Type

The designed shape of vibration-absorbing rubber achieves high torsional stiffness and high torque according to the newest finite 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.

XGT-C/XGL-C/XGS-C_CFlexible Couplings - High-gain Rubber Type


Material/Finish

XGT/XGL/XGS
Hub A2017
High-Gain Rubber HNBR*1
Hex Socket Head Cap Screw / Hex Socket Set Screw SCM435
Ferrosoferric Oxide Film (Black)

*1: In some sizes, DEHP (di-2-ethylhexyl phthalate) is contained in the HNBR above the threshold value, thus do not comply with the revised RoHS Directive (RoHS2). It is scheduled to conform to all sizes by the end of December 2018.

For conformity status of each size, please contact our customer service.

All sizes conform to the former RoHS Directive subject to six substances.


Characteristics

  • Recommended Applicable Motor
XGT/XGL/XGS
Servomotor
Stepping Motor
General-purpose Motor

◎: Excellent ○: Very good ●: Available

  • 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

  • A completely integrated flexible coupling that connects hubs on both sides with high-gain rubber.
  • It is suitable for control motors with high responsiveness, enabling high-accuracy positioning and shortened stabilization time.
  • About reduction of stabilization time XGT2XGL2

Application

Actuator / Surface-mount machine / High precision XY stage / Index table

Selection

Selection Based on Shaft Diameter and Rated Torque

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

XGT-C/XGL-C/XGS-C_CFlexible Couplings - High-gain Rubber Type

XGT-C/XGL-C/XGS-C_CFlexible Couplings - High-gain Rubber Type

XGT-C/XGL-C/XGS-C_CFlexible Couplings - High-gain Rubber Type

Selection Example

In case of selected parameters of shaft diameter of φ19 and load torque of 7 N•m, the selected size is XGT-39C.

Selection Based on the Rated Output of the Servomotor

Rated Output
(W)
Servomotor Specifications*1 Selection Size
Diameter of Motor Shaft
(mm)
Rated Torque
(N・m)
Instantaneous Max. Torque
(N・m)
XGT XGL XGS
10 5 - 6 0.032 0.096 15C 15C 15C
20 5 - 6 0.064 0.19 15C 15C 15C
30 5 - 7 0.096 0.29 19C 19C 19C
50 6 - 8 0.16 0.48 19C 19C 19C
100 8 0.32 0.95 19C 19C 25C
200 9 - 14 0.64 1.9 27C 30C 27C
400 14 1.3 3.8 27C 30C 34C
750 16 - 19 2.4 7.2 39C 39C -

*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.


Eccentric Reaction Force

XGT-C/XGL-C/XGS-C_TTechnical Information

XGT-C/XGL-C/XGS-C_TTechnical Information

XGT-C/XGL-C/XGS-C_TTechnical Information

This is the force generated when placing XGTXGLXGS in an eccentric condition. As the eccentric reaction force becomes smaller, the force acting on the shaft bearing also becomes smaller.

XGT-C/XGL-C/XGS-C_TTechnical Information


Thrust Reaction Force

XGT-C/XGL-C/XGS-C_TTechnical Information

XGT-C/XGL-C/XGS-C_TTechnical Information

XGT-C/XGL-C/XGS-C_TTechnical Information

This is the force generated when compressing XGTXGLXGS in the axial direction. As the thrust reaction force becomes smaller, the force acting on the motor also becomes smaller.

XGT-C/XGL-C/XGS-C_TTechnical Information


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%.
Changes in the static torsion spring constant within the operating temperature are shown in the graph.
Before using the unit, be aware of the deterioration of responsiveness.

XGT-C/XGL-C/XGS-C_TTechnical Information


Related Products

XGT2enables further improvement of productivity by adding damping performance to XGT.
XGT2XGL2

XGT-C/XGL-C/XGS-C_CFlexible Couplings - High-gain Rubber Type


Related Service

Product List

Customer Service

  • Usage Method
  • Technical Question
  • Customization Products
USA and Canada

NBK America LLC

9:00 to 17:00 on weekdays, Eastern Standard Time

Asia and Europe

Nabeya Bi-tech Kaisha

9:00 to 17:15 on weekdays, Japan Standard Time