Shaft coupling

[Fausto]

Hello,

The prop shaft coupling on my Narrowboat has just collapsed.

I’m trying to dismount the coupling but part of it doesn’t want to come off.

 

Also I need to find a replacement and I’m not sure which coupling.

Any suggestions?

 

I’ve attached few images , so you can have a better idea.

 

Thanks

Fausto.

 

[mrsmelly]

Looks like a centaflex coupling or similar.

[Tracy D'arth]

17 minutes ago, Fausto said:

Hello,

The prop shaft coupling on my Narrowboat has just collapsed.

I’m trying to dismount the coupling but part of it doesn’t want to come off.

 

Also I need to find a replacement and I’m not sure which coupling.

Any suggestions?

 

I’ve attached few images , so you can have a better idea.

 

Thanks

Fausto.

 

Take the 6 bolts out and put some of them in the unoccupied holes to jack the collet open and it will slide off. I think some of the couplings may need to use longer bolts than the ones there. Try with the existing first, screw them in and tighten them. You should feel the collet release.

 

It is a Centraflex,  https://www.rexnord.com/products-services/process-motion-control/couplings/torsionally-soft-couplings/centaflex-a

 

Check the engine alignment to the prop shaft, a failure like that is usually a sign that the alignment is way off and you have exceeded the allowable out of alignment. Your engine mounting may well have settled down too much.

Edited August 10, 2022 by Tracy D'arth

[Fausto]

Thanks a lot!

[DHutch]

Great work. 

 

Topic moved to boat building and maintenance section. 

 

 

Thanks