NBK COUPLING
NBK Double Disk Flexible Coupling
NBK Couplicon® XBW / XBWS 
- NBK coupling ; high torque ,zero blacklash, Flexible disk coupler.
- Stainless steel disks absorb parallel, angular and shaft end-play misalignments
- Identical clockwise and counter-clockwise rotational characteristics
- XBW hub is manufactured from extra super duralumin (A7075)
- The highest strength aluminum alloy
- XBWS features all stainless steel structure
- Available in a wide range of sizes
- Outer diameter: φ15~φ104. Bore Diameter: φ3~φ50
- Finished products featuring two different end bore diameters available in stock
- Application
Servomotor A Stepping Motor A General-Purpose Motor – Encoder –
NBK Couplicon® XBW / XBWS : Specifications
|
NBK Catalogue no.
|
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) |
|---|---|---|---|---|---|---|---|---|---|---|
| XBW-15C2 |
6
|
0.6
|
1.2
|
42000
|
2.2×10-7
|
200
|
0.05
|
1
|
±0.2
|
7.5
|
| XBW-19C2 |
8
|
1
|
2
|
33000
|
6.7×10-7
|
450
|
0.15
|
2
|
±0.2
|
14
|
| XBW-25C2 |
12
|
2
|
4
|
25000
|
2.3×10-6
|
850
|
0.2
|
2
|
±0.4
|
24
|
| XBW-27C2 |
14
|
2.2
|
4.4
|
23000
|
3.1×10-6
|
1000
|
0.2
|
2
|
±0.4
|
30
|
| XBW-34C3 |
16
|
4.2
|
8.4
|
18000
|
9.0×10-6
|
1600
|
0.25
|
2
|
±0.6
|
63
|
| XBW-39C2 |
20
|
8
|
16
|
16000
|
2.1×10-5
|
3200
|
0.3
|
2
|
±0.6
|
120
|
| XBW-44C2 |
22
|
10
|
20
|
14000
|
3.5×10-5
|
3900
|
0.3
|
2
|
±0.6
|
151
|
| XBW-56C3 |
28
|
25
|
50
|
11000
|
1.2×10-4
|
9000
|
0.3
|
2
|
±0.8
|
322
|
| XBW-68C5 |
32
|
60
|
120
|
9000
|
3.5×10-4
|
18000
|
0.3
|
2
|
±1
|
617
|
| XBW-82C5 |
35
|
80
|
160
|
7000
|
9.0×10-4
|
35000
|
0.5
|
2
|
±1.2
|
1220
|
| XBW-94C7 |
45
|
150
|
300
|
6000
|
1.5×10-3
|
40000
|
0.5
|
2
|
±1.4
|
1500
|
| XBW-104C8 |
50
|
200
|
400
|
6000
|
2.3×10-3
|
50000
|
0.5
|
2
|
±1.4
|
1820
|
| XBWS-15C2 |
6
|
0.5
|
1
|
42000
|
5.0×10-7
|
300
|
0.05
|
1
|
±0.2
|
20
|
| XBWS-19C2 |
8
|
1
|
2
|
33000
|
1.6×10-6
|
550
|
0.15
|
2
|
±0.2
|
38
|
| XBWS-25C2 |
12
|
1.2
|
2.4
|
25000
|
6.1×10-6
|
1100
|
0.2
|
2
|
±0.4
|
71
|
| XBWS-27C2 |
14
|
1.5
|
3
|
23000
|
8.2×10-6
|
1300
|
0.2
|
2
|
±0.4
|
88
|
| XBWS-34C3 |
16
|
3.5
|
7
|
18000
|
2.5×10-5
|
1800
|
0.25
|
2
|
±0.6
|
160
|
| XBWS-39C2 |
20
|
5
|
10
|
16000
|
5.1×10-5
|
3500
|
0.3
|
2
|
±0.6
|
260
|
| XBWS-44C2 |
22
|
7
|
14
|
14000
|
8.9×10-5
|
5500
|
0.3
|
2
|
±0.6
|
400
|
| XBWS-56C3 |
28
|
15
|
30
|
11000
|
2.9×10-4
|
10000
|
0.3
|
2
|
±0.8
|
800
|
*Adjustment of rated and maximum torque specifications for load fluctuations is not required.
For more detailed information, please refer to NBK Coupling Selection Guideline [PDF 171KB].
**Moment of inertia and mass figures based on maximum bore dimensions.
