
NBK COUPLING
NBK Gum Type flexible couplings
NBK Couplicon® XGT/ XGS 
- NBK coupling XGT
- Vibration Absorbtion
- High Torque, High Response
- Zero Backlash
- XGT/XGS are protected by design patent. China : ZL2007 3 0154185.2, Korea : 30-0482301, Taiwan : D124815, U.S. : Pat. No. Des. D573,166
- Single piece structure with anti-vibration rubber molded between the two hubs
- Available in high torque variety XGT
- Identical clockwise and counter-clockwise rotational characteristics
- Exhibits excellent electrical insulation
- Operational temperature: -20C~80C
- Split Coupling
- Easy attachment and removal
- In Pursuit of Optimal Design; Using the latest FEM analysis techniques, the construction of the anti-vibration rubber is designed to yield high torsional stiffness and torque. Additionally, the shape is designed to relieve stress from the jaws’ inner diameter. By distributing stress uniformly throughout the jaw, product longevity is significantly increased (patent pending).
- Application
Servomotor A Stepping Motor A General-Purpose Motor B Encoder –
<<NBK COUPLICON>>
NBK Couplicon® XGT : Specifications
Catalog
Number |
Max. Bore
(mm) |
Rated
Torque (N·m) |
Max.
Torque (N·m) |
Max. Rotational
Frequency (min-1) |
Moment
of Inertia* (kg·m2) |
Static Torsional
Stiffness (N·m/rad) |
Errors of
Eccentricity (mm) |
Errors of
Angularity (°) |
Errors of
Shaft End-Play (mm) |
Mass*
(g) |
---|---|---|---|---|---|---|---|---|---|---|
XGT-15C
|
6
|
1.1
|
2.2
|
42000
|
2.7×10-7
|
43
|
0.15
|
1.5
|
±0.2
|
8
|
XGT-19C
|
8
|
2.1
|
4.2
|
33000
|
8.4×10-7
|
88
|
0.15
|
1.5
|
±0.2
|
14
|
XGT-25C
|
12
|
4
|
8
|
25000
|
3.0×10-6
|
170
|
0.15
|
1.5
|
±0.2
|
28
|
XGT-30C
|
15
|
6.3
|
12.6
|
21000
|
6.9×10-6
|
220
|
0.20
|
1.5
|
±0.3
|
45
|
XGT-34C
|
16
|
8
|
16
|
18000
|
1.3×10-5
|
390
|
0.20
|
1.5
|
±0.3
|
65
|
XGT-39C
|
20
|
13.5
|
27
|
16000
|
2.7×10-5
|
520
|
0.20
|
1.5
|
±0.3
|
98
|
XGT-44C
|
22
|
18
|
36
|
14000
|
4.2×10-5
|
640
|
0.20
|
1.5
|
±0.3
|
136
|
XGT-56C
|
28
|
35
|
70
|
11000
|
1.4×10-4
|
1500
|
0.20
|
1.5
|
±0.3
|
276
|
NBK Couplicon® XGS : Specifications
Catalog
Number |
Max. Bore
(mm) |
Rated
Torque (N·m) |
Max.
Torque (N·m) |
Max. Rotational
Frequency (min-1) |
Moment
of Inertia* (kg·m2) |
Static Torsional
Stiffness (N·m/rad) |
Errors of
Eccentricity (mm) |
Errors of
Angularity (°) |
Errors of
Shaft End-Play (mm) |
Mass*
(g) |
---|---|---|---|---|---|---|---|---|---|---|
XGS-15C
|
6
|
0.5
|
1
|
42000
|
2.0×10-7
|
25
|
0.15
|
1.5
|
±0.2
|
7
|
XGS-19C
|
8
|
0.8
|
1.6
|
33000
|
6.2×10-7
|
63
|
0.15
|
1.5
|
±0.2
|
12
|
XGS-25C
|
12
|
2.3
|
4.6
|
25000
|
2.3×10-6
|
125
|
0.15
|
1.5
|
±0.2
|
25
|
XGS-30C
|
15
|
3.3
|
6.6
|
21000
|
5.5×10-6
|
160
|
0.20
|
1.5
|
±0.3
|
39
|
XGS-34C
|
16
|
5.5
|
11
|
18000
|
1.0×10-5
|
350
|
0.20
|
1.5
|
±0.3
|
62
|
XGS-39C
|
20
|
7
|
14
|
16000
|
2.1×10-5
|
440
|
0.20
|
1.5
|
±0.3
|
85
|
*Adjustment of rated and maximum torque specifications for load fluctuations is not required.
However, if operating temperature exceeds 30℃, please adjust rated torque and maximum torque as detailed in the table below.
The operational temperature range for XGT/XGS is -20℃~80℃. For more detailed information, please refer to NBK Coupling Selection Guidelines [PDF 171KB].
**Moment of inertia and mass figures based on maximum bore dimensions.
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