Gunsmithing Best Devcon for Bedding?

[Wheres-Waldo]

Was looking at the Devcon metal-putty selection and was wondering if "Titanium-Putty" would give me any problems?

One of its suggested uses if to repair parts intended to be precision machined. Sounds like a good quality, suggesting its uber stable...Plus, its fuckin' TITANIUM!

Assuming this would also work with Kiwi as a release agent?

 

[wnroscoe]

Re: Best Devcon for Bedding?

10110 is all you'll need. The Titanium is about twice or three times the price.

 

[BHP9]

Re: Best Devcon for Bedding?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Wheres-Waldo</div><div class="ubbcode-body">Was looking at the Devcon metal-putty selection and was wondering if "Titanium-Putty" would give me any problems?

One of its suggested uses if to repair parts intended to be precision machined. Sounds like a good quality, suggesting its uber stable...Plus, its fuckin' TITANIUM!

Assuming this would also work with Kiwi as a release agent? </div></div>

Just go with Devcon Steel Putty.

Johnson's Paste Wax for a release agent.

Some people use PAM for a release agent.

 

[jasonk]

Re: Best Devcon for Bedding?

The 10110 mentioned above is the Steel putty, I've also uses Aluminum and it seems to work fine as well.

 

[sobrbiker883]

Re: Best Devcon for Bedding?

The steel, aluminum and Ti reinforce a great epoxy base. I would use any of them (10110 is my usual blend).
Hornady OneShot is my release agent of choice with Kiwi for threaded stuff.

 

[Nocalphoenix]

Re: Best Devcon for Bedding?

Be careful with that. Devcon also offers a syringe based product that is sold in alot of hardware stores called Titanium metal epoxy. That is not the same as the industrial titanium epoxy you would get from someplace like Brownells.

 

[7mmRM]

Re: Best Devcon for Bedding?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: wnroscoe</div><div class="ubbcode-body">10110 is all you'll need. </div></div>


+1

 

[Jimmy2Times]

Re: Best Devcon for Bedding?

10110 Devcon Steel Putty. that's what you want. Get it from McMaster Carr, they ship quick.

 

[treebasher]

Re: Best Devcon for Bedding?

OK here is an engineering question that I have been tossing around in my head for a while now.

When you are bedding a rifle do you want to match the CTE (Coefficient of Thermal Expansion) between the bedding compound (epoxy) and the CTE of the action or the CTE of the stock?

Here are some CTE's of common materials used in a rifle:

Epoxy, castings resins & compounds, unfilled ~ 31 x 10-6 in/in oF
Steel ~ 7.3 x 10-6 in/in oF
Steel Stainless Austenitic (304) ~ 9.6 x 10-6 in/in oF
Steel Stainless Austenitic (310) ~ 8.0 x 10-6 in/in oF
Steel Stainless Austenitic (316) ~ 8.9 x 10-6 in/in oF
Steel Stainless Ferritic (410) ~ 5.5 x 10-6 in/in oF
Devcon Technical Data including CTE's

It makes sense to me to keep the bedding material and the stock material as close as possible in physical properties to ensure a monolithic block.

Also if the stock/bedding material has a lower compressive strength than the action (steel) it should not exert any forces on the action that are great enough to cause deflection.

Has anybody done any testing on this? I can't remember seeing anything in <span style="text-decoration: underline">Rifle Accuracy Facts</span> by Harold R. Vaughn about this. I think I am going to go dust that book off...

 

[Nocalphoenix]

Re: Best Devcon for Bedding?

Man you just opened a big can of worms. I was discussing this with a rocket scientist (yes an actual RS) who is getting into benchrest. He also pointed out the need for the action, base, rings and scope tube to be of similiar materials to avoid thermal compresion or stress as the action heats and cools.

I should have walked away before he went to deep on it, now I cannot imagine ever being able to shoot small groups again with a stainless rifle, steel scope, steel base and rings, steel epoxy, fiberglass stock and aluminum bottom metal.

 

[former naval person]

Re: Best Devcon for Bedding?

If you use the titanium putty and screw up you need carbide tools to remove the stuff...or lots of carbon steel bits.