Metal Bellows Couplings BK
Please select a Metal Bellows Coupling:
Bellows coupling model BK7 with expanding shaft
Series from 15 - 300 Nm
Data table and Downloads Bellows Coupling BK7 Series 15 - 300 Nm
|
Model BK7
|
Series
|
|
15
|
30
|
60
|
150
|
300
|
| Rated torque (Nm) |
TKN | 15 | 30 | 60 | 150 | 300 |
| Overall length (inserted) (mm) |
A | 45 | 52 | 53 | 61 | 62 | 72 | 71 | 83 | 84 |
98 |
| Outer diameter (mm) |
B | 49 | 55 | 66 | 81 | 110 |
| Fit length (mm) |
C1 | 22 | 27 | 32 | 36 | 43 |
| Inner diameter possible
from Ø to Ø H7 (mm) |
D1 | 8-28 | 10-30 | 12-35 | 19-42 | 30-60 |
| Fit length (mm) |
C2 | 20 | 25 | 27 | 32 | 45 |
| Shaft Diameter possible
from
Ø to Ø h7 (mm) |
D2 | 13-25 | 14-30 | 23-38 | 26-42 | 38-60 |
| Fastening screws ISO 4762 |
E1/2 | M5 | M6 | M8 | M10 | M12 |
| Tighting torque of the
Fastening screws (Nm) |
E1/2 | 8 | 14 | 38 | 65 | 120 |
| Distance between centers (mm) |
F | 17 | 19 | 23 | 27 | 39 |
| Distance (mm) |
G | 6.5 | 7.5 | 9.5 | 11 | 13 |
| Moment of inertia
(10-3 kgm2) |
Jges | 0.07 | 0.08 | 0.14 | 0.15 | 0.23 | 0.26 | 2.2 | 2.4 | 6.5 |
8.9 |
| Hub material
(standard) (steel on request) |
|
Al | Al | Al | Steel | Steel |
| Approx. weight (kg) |
| 0.15 | 0.3 | 0.4 | 1.7 | 4 |
| Torsional stiffness
(103 Nm/rad) |
CT | 20 | 15 | 39 |
28 | 76 | 55 | 175 | 110 | 450 | 350 |
axial 
(mm) |
max. | 1 | 2 | 1 |
2 | 1.5 | 2 | 2 | 3 | 2.5 | 3.5 |
lateral  (mm) |
max. | 0.15 | 0.2 | 0.2 | 0.25 | 0.2 | 0.25 | 0.2 | 0.25 | 0.25 | 0.3 |
| axial spring stiffness (N/mm) |
Ca | 20 | 12 | 50 |
30 | 72 | 48 | 82 | 52 | 105 | 71 |
| lateral spring stiffness (N/mm) |
Cr | 315 | 108 | 730 | 230 | 1200 | 380 | 1550 | 435 | 3750 | 1050 |
Downloads
short version |
15
|
30
|
60
|
150
|
300
|
| 2D-DXF (ZIP folder) |
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| 3D-EXE (Viewer) |
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| 3D-STEP (ZIP folder) |
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Downloads
long version |
15
|
30
|
60
|
150
|
300
|
| 2D-DXF (ZIP folder) |
|
|
|
|
|
|
| 3D-EXE (Viewer) |
|
|
|
|
|
|
| 3D-STEP (ZIP folder) |
|
|
|
|
|
|
(1Nm = 8.85 in lbs), max. angular misalignment 1 degree
Ordering example
Required
information for servo bellows coupling model BK7.
Technical instructions:
By tightening the screw through the bellow body, the shaft is caused to expand.
The coupling is designed for high dynamic hollow shaft connections eg.
gear boxes. Recommended bore tolerance: ISO H7
Torsionally Rigid and Flexible Shaft Couplings
Last update: 01-26-2006
