• Couplings
  • High Gain Rubber Type

XGS2

Flexible Couplings - High-gain Rubber Type - Short Type

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

Dimension Drawing

XGS2Flexible Couplings - High-gain Rubber Type - Short 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
XGS2-15C 15 6.5 18 2.15 5 M1.6 0.25 CAD RFQ
XGS2-19C 19 7.7 20 2.65 6.5 M2 0.5 CAD RFQ
XGS2-25C 25 9.5 27 3.25 9 M2.5 1 CAD RFQ
XGS2-27C 27 9.5 27 3.25 10 M2.5 1 CAD RFQ
XGS2-30C 30 11 30 4 11 M3 1.5 CAD RFQ
XGS2-34C 34 12 35 4 12.25 M3 1.5 CAD RFQ
XGS2-39C 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*1
(N・m)
Max. Rotational Frequency
(min-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
XGS2-15C 6 - 0.5 42000 2.1×10-7 64 0.15 1.5 ±0.2 7
XGS2-19C 8 6 0.8 33000 5.9×10-7 170 0.15 1.5 ±0.2 12
XGS2-25C 12 9 2.3 25000 2.4×10-6 290 0.15 1.5 ±0.2 24
XGS2-27C 14 10 2.3 23000 3.2×10-6 290 0.15 1.5 ±0.2 28
XGS2-30C 15 11 3.3 21000 5.2×10-6 430 0.2 1.5 ±0.3 38
XGS2-34C 16 12 5.5 18000 1.1×10-5 800 0.2 1.5 ±0.3 61
XGS2-39C 20 15 7 16000 2.1×10-5 930 0.2 1.5 ±0.3 90

*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 XGS2 is -10℃ to 120℃.

※ The shaft's slip torque may be smaller than the coupling's rated torque depending on the shaft bore. XGT2XGL2

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

Part Number Standard Bore Diameter D1・D2
XGS2-15C 3-5 3-6 4-4 4-5 4-6
4.5-5 5-5 5-6 6-6  
XGS2-19C 4-5 5-5 5-6 5-7 5-8
6-6 6-6.35 6-7 6-8 6.35-8
8-8        
XGS2-25C 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        
XGS2-27C 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
XGS2-30C 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    
XGS2-34C 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
XGS2-39C 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
● Bore and keyway modifications are available on request. Please take advantage of our modification services.

Ambient Temperature / Temperature Correction Factor

Ambient Temperature Temperature Correction Factor
-10℃ to 30℃ 1.00
30℃ to 40℃ 0.80
40℃ to 60℃ 0.70
60℃ to 120℃ 0.55

Slip Torque

As in the table below, the clamping types XGT2-C, XGL2-C, and XGS2-C have different slip torque according to the bore diameter. Take care during selection.

Unit : N・m

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 XGT2-CXGL2-CXGS2-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

Clamping Type

XGT2-C Standard type XGT2
XGL2-C Long type XGL2
XGS2-C Short typeXGS2

XGT2/XGL2/XGS2_CFlexible Couplings - High-gain Rubber Type

Internal Structure

XGT2/XGL2/XGS2_CFlexible Couplings - High-gain Rubber Type


Material/Finish

XGS2
Hub A2017
High-Gain Rubber FKM
Hex Socket Head Cap Screw SCM435
Ferrosoferric Oxide Film (Black)

Characteristics

  • Recommended Applicable Motor
XGT2-C/XGL2-C/XGS2-C
Servomotor
Stepping Motor
General-purpose Motor

◎: Excellent ○: Very good ●: Available

  • Property
XGT2-C (O.D. φ56 or Less)
/XGL2-C/XGS2-C
XGT2-C (O.D. φ68)
Zero Backlash
For Servomotor High Gain
High Torque
High Torsional Stiffness
Allowable Misalignment
Vibration Absorption Characteristics
Electrical Insulation -
Allowable Operating Temperature -10℃ to 120℃ -20℃ to 80℃

◎: Excellent ○: Very good

  • High-gain flexible coupling which surpasses XGT-CXGL-CXGS-C in performance. This is a single-piece construction with the two aluminum hubs molded with high-gain rubber.
  • The optimal damping and rigidity design enables realization of even greater servomotor gain, leading to reduced stabilization time.
    XGT2XGL2
    XGT2XGL2
    XGT2XGL2
    XGT2XGL2
    XGT2XGL2
    XGT2XGL2
    XGT2XGL2

Application

Semiconductor manufacturing equipment / Mount machines / Machine tools / Packaging machines

Selection

Selection Based on Shaft Diameter and Rated Torque

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

XGT2/XGL2/XGS2_CFlexible Couplings - High-gain Rubber Type

XGT2/XGL2/XGS2_CFlexible Couplings - High-gain Rubber Type

Selection Example

In case of selected parameters of shaft diameter of φ16 and load torque of 7N・m, the selected size is XGT2-34C.

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)
XGT2-C XGL2-C XGS2-C
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

XGT2/XGL2/XGS2_TTechnical Information

XGT2/XGL2/XGS2_TTechnical Information

XGT2/XGL2/XGS2_TTechnical Information

This is the force generated when placing XGT2-CXGL2-CXGS2-C in an eccentric condition.
As the eccentric reaction force becomes smaller, the force acting on the shaft bearing also becomes smaller.

XGT2/XGL2/XGS2_TTechnical Information


Thrust Reaction Force

XGT2/XGL2/XGS2_TTechnical Information

XGT2/XGL2/XGS2_TTechnical Information

XGT2/XGL2/XGS2_TTechnical Information

This is the force generated when compressing XGT2-CXGL2-CXGS2-C in the axial direction. As the thrust reaction force becomes smaller, the force acting on the motor also becomes smaller.

XGT2/XGL2/XGS2_TTechnical Information


Related Service

Product List

Customer Service

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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