The answer is that, notably from the after-market, there is still a huge demand for replacement flexible couplings, for units already in service, types 6 and 10 as well as the Uniflex models. The Bullflex elastic couplings represent the latest, state-of-the-art technology and are therefore recommended for new installations.
Bullflex
The Vetus Bullflex flexible coupling has the following advantages:
- very high flexibility
- optimum damping of vibrations
- secured against shearing off (axially and radially)
- misalignment of 2% permissable
- excellent centering of the shaft, allowing for high speed revolutions even at 2 degrees misalignment
- the shaft will remain centred even in reverse gear
- possibility to remove the centering ring
- built-in thrust damper
- non-tapered clamping hub, for perfect centering and easy assembly / disassembly
| 1 |
20mm / 25mm / 1.00" |
1.1 |
0.7 |
3500 |
| 2 |
20mm / 25mm / 1.00" |
2.1 |
1.3 |
3250 |
| 4 |
25mm / 30mm / 1.00" |
4.3 |
2.8 |
3000 |
| 8 |
30mm / 35mm / 40mm / 1.25" / 1.50" |
8.5 |
5.8 |
2500 |
| 12 |
35mm / 40mm / 45mm / 1.5" / 1.75" |
12.8 |
9.6 |
2500 |
| 16 |
40mm / 45mm / 50mm / 1.5" / 1.75" / 2.00" |
17.1 |
13.3 |
2000 |
| 32 |
45mm / 50mm / 60mm / 2.00" |
31.3 |
25.3 |
1800 |
Uniflex
The Vetus Uniflex flexible coupling is a predecessor to the Bullflex and has similar features, although has a different method of connection to the shaft which may suit existing installations.
| 12 |
20mm / 25mm / 30mm |
2.8 |
5.6 |
1500 |
| 16 |
30mm / 35mm / 40mm |
5.6 |
5 |
1500 |
Type 6 / Type 10
The Vetus Type 6 and Type 10 flexible couplings provide a cheaper alternative to the Bullflex, but the shaft must be aligned exactly. The Type 6 fixes to the shaft by means of a through-pin and the Type 10 by means of a tapered bore and keyway.
| Type 6 |
25mm / 30mm / 35mm |
5.3 |
4.5 |
1500 |
| Type 10 |
40mm / 45mm / 50mm |
8.8 |
7.5 |
1500 |