Adhesive augmented shaft coupling

[CrazyJ]

Does anyone have experience with bolted shaft couplings that employ a friction modifier between flange faces, such as an anaerobic acrylic adhesive (possibly from a certain threadlocker manufacturer)? Can anyone suggest a type that provides high shear strength, but doesn't harden? I'd like to be able to dismantle them.

Would anaerobic pipe thread sealant do the trick? The coupling I'm working on is submerged in water, so resistance to polar solvents is a plus.

The manufacturer of the coupling spec's a nitrocellulose lacquer paint mixed with boron-carbide, sprayed across one face. While this may work, I find it a bit unorthodox, plus the paint thickness variation could quite possibly affect the coupling alignment (it's supposed to be dry before coupling). I would get a more warm fuzzy feeling if the coupling was performed with a liquid/gel/paste so there would be opportunity for full metal to metal contact with the friction agent filling in gaps only, not creating its own gaps - it could lead to fretting damage if the bolt tension is not quite high enough.

 

[unclesyd]

Here is product that might work. I've never used it or know of any specific applications other than a few articles that mention it for press fits.

This is sort of a weird website as they have all their products on one page. It appears that the technology use in making the friction product has other unusual applications, so don't get alarmed.

http://www.tribtech.com/

http://www.tribtech.com/app.1.htm

 

[CrazyJ]

I contacted the Tribtech folks, and they said that this isn't an application that applies (I believe they do include shrink fit shaft couplings though).

It looks as though for this application, there are few alternatives. There's the acrylic anaerobic adhesives, or other anaerobic adhesives. I have also come across a prefab gasket that appears to use the same idea as the chinese boron-carbide coating. It is a gasket coated in diamond powder. Both of these seem to rely on the fragments biting into each shaft surface, providing increased shear strength.

Not quite sure how to determine the actual value of the shear resistance.

 

[unclesyd]

We struck out on adhesive approach but thought about the possibility of using a Tolerance Ring like the BN type shown in the USA Tolerance Ring Brochure..

http://www.usatolerancerings.com/