Glue for Rifle Stock Repair???

[G.T.]

Hi Rich, in my previous lives, I was a service manager in a large boat shop... we worked a lot with polyester and epoxies, and every one on the planet has worked with super glue... Cyanoacrylate.... But, the very best adhesive for your task may be just commercial grade wood glue??
From the net...polyvinyl acetate (PVA), also known as "white glue" or "hobby and craft", and aliphatic resin emulsion, commonly referred to as "carpenter's glue" or "Yellow glue"
Both would provide a bond stronger then the surrounding wood... But if your really serious... some type of long setting epoxy would be the strongest.. the weirder the mixing ratio, the better the Epoxy... Epon mil. spec. was the strongest I ever used... polyester, not so good, very little penetration and will fracture easily... Good luck, til...lat'r...GT...

[kzullick]

I build and repair longrifles, I use Titebond III.

[sheepherder]

Originally Posted by G.T.

... polyester, not so good, very little penetration and will fracture easily...

Gerry, I'm somewhat surprised to hear you say that. I've used Polyester Resin (with or without Fiberglas mat or cloth) to repair my wood [plywood/pine] boats, my 66 Corvette, even patch holes in gunstocks. I've found that with hardwood sawdust mixed in, it makes a good filler. I've even used it to repair drawers and wood boxes. In the few instances that I've ripped the bonded wood pieces apart, I've noticed that the resin does penetrate. And it was the wood that separated when I pried it apart.

I like my 'glue' to also fill. There will always be voids and dimples; with the resin I can go back later and fill in. And it can be ground, filed, sanded to a smooth finish. Some glues soften with heat (from sanding friction).

I'm not a firm believer in the Resin, which is why I asked here. It has drawbacks, but they can be worked with.

But it was not intended to be a wood adhesive. Surely there are better 'glues' out there. I've always been fascinated by the method used by the British to refurbish their old Enfield gunstocks (and even handguards). Patches; cracks milled out and wood chunks glued in; even broken stocks glued back together (and reinforced). Seems like the British re-used everthing wood. That is the glue I would prefer.

I'm not a woodworker. Even my woodworking reflects my mechanical background. I'll try the Titebond III from Home Depot on a couple pieces of gunstock scrap and see how it works.

BTW: The three boats that my father and I built back in the late 50's/early 60's can be found here -

http://www.svensons.com/boat/

"Car Top Boat", "MiniMost", and "Blue Streak"

We built them in our basement in the Winters, great experience. The Blue Streak was re-built by me a year after construction to move the cockpit further forward...To better handle the Mercury Mark 30 4-cyl I put on it to replace the 2-cyl Mark 25...

[sheepherder]

I was able to get out to Home Depot today and got a bottle of Titebond III (Ace didn't have it) . They also had Titebond ['The Original'], Titebond II ['Premium'] and the Titebond III ['Ultimate']. But since y'all think III is the way to go, I bought a bottle ($8.61).

I couldn't find any scrap stock pieces that weren't usable for something, so I tried it on a pair of scrap pieces of Walnut lying around. Same end mill finish as the Mauser stock groove/tongue I cut, rubber banded together as I would the rifle stock. I'll check it in 24+ hours and see how it turns out.

I also noticed that the toe of the stock had been broken off/cracked extensively at some time in the past, and some unknown previous owner had 'glued' (or epoxied) it...I can't pull or twist it apart with my two somewhat flabby arms, so I guess it's a good join...A little off; I can feel the uneven surfaces, it'll take a bit of sanding and maybe a little filler to even both sides out...

I wish I knew what this toe join was 'glued' with, it easily passes my lax quality control for 'glued' joins...

[Olle]

Originally Posted by postino

I like my 'glue' to also fill. There will always be voids and dimples; with the resin I can go back later and fill in. And it can be ground, filed, sanded to a smooth finish. Some glues soften with heat (from sanding friction).

This is why I recommended Gorilla Glue and not Titebond. I use Titebond almost exclusively for my woodworking projects, but the way you made the cut doesn't really lend itself to good clamping. To get a strong joint with Titebond you need good wood-to-wood contact, and even if it looks like a nicely cut slip joint, there could be voids where the glue won't adhere well.

I use Gorilla Glue if I can't clamp well or where the surfaces are rough, it expands and fills the voids and it's at least as strong as a good Titebond joint. Sometimes you have to nail the pieces to keep the expanding glue from pushing them apart, but in this case I would just shoot some brads to hold it in place while the glue is setting up.

Edit: That old joint is probably doweled and glued.

[sheepherder]

Originally Posted by Olle

...the way you made the cut doesn't really lend itself to good clamping. To get a strong joint with Titebond you need good wood-to-wood contact, and even if it looks like a nicely cut slip joint, there could be voids where the glue won't adhere well.

I made a tongue & groove join because it gives me maximum surface area; I don't want it tight because that would cause the glue/epoxy to be scraped off when I push it on. I have an easy slip join now, with no twist.

I'll be using the barrel itself as my 'jig', with a layer of masking tape on the barrel itself (to give me a little 'float' when done) covered by a single piece of waxed paper to keep the glue/epoxy/resin from sticking to anything.

We all use what we're most familiar with; with me, it's the polyester resin. I mix it with paint if I want to give it color; or with sawdust to make a filler for filling small holes. Occasionally I'll cut a piece of hardwood to make a patch and use the resin to 'glue' that in place (see pics below).

One other outstanding 'glue'/epoxy I've used is by DevCon ["2 Ton Epoxy']; it comes in a big syringe with two chambers, epoxy & hardener; you push the plunger in and it mixes as it comes out. Unfortunately, it has a short shelf life when opened...

(No, these plugs are not pretty...)

[Olle]

Originally Posted by postino

I made a tongue & groove join because it gives me maximum surface area; I don't want it tight because that would cause the glue/epoxy to be scraped off when I push it on. I have an easy slip join now, with no twist.

That's kind of what I thought. The only way to get a strong joint with wood glue (type Titebond) is to taper it slightly so the surfaces are wedged against each other as you tap it in. And no, I wouldn't want to cut such a joint either.

Like you said in a previous post, you'll need something that fills the joint, and it doesn't need to shrink either.

[sheepherder]

As noted in post # 13 above, I rubber-banded two pieces of Walnut scrap together and glued with Titebond III. It's 27 hours later (instructions say fully cured at 24 hrs) and time to test the join.

First pic below shows the pieces clamped in my mill vise. I pulled back as hard as I could with both hands/arms, and could not break the join. I could see the Walnut bend a bit, but it wouldn't break. This is great! The joins I envision making are non-load bearing joins, so this would work OK.

I still wondered how strong the join was, whether the wood would break, whether the wood fibers would rip out before the glue let go. So, I put a 12" Crescent wrench on the upper piece, and gave it a go. The glue join finally broke; no fibers ripped out; no wood breaking (second pic).

Still not a failure. I won't be yanking on these joins on the rifle. The only negative I had was when it came time to clean off the surfaces. The glue itself would not sand cleanly; it was semi-flexible and 'peeled' rather than sanded off. That could be a problem when sanding down the join or using it as filler.

After digging that DevCon 2-Ton Epoxy out, I decided to try that, just for S&G. I belt-sanded down the opposite ends of the scrap pieces and applied the DevCon the same as I did the Titebond III. I'll try my test again tomorrow after the epoxy has set up (third pic).

Curing conditions: In my house, 78º - 80º F for 24+ hours.