Eagle Posted September 11, 2020 Share Posted September 11, 2020 How thick can JB Weld be built up in one lift/pass? I have a cylindrical thingie that I need to fill with something metallic(ish). Length about 1-1/4", diameter -- well, okay it's not exactly a cylinder -- about 1/2" x 3/4". Can I just mix up the goop and ladle it in, or does JB Weld need thin layers to cure properly? The instructions don't seem to address that. Link to comment Share on other sites More sharing options...
75sv1 Posted September 11, 2020 Share Posted September 11, 2020 I think you should be OK with a thick layer. JB Weld as an epoxy creates its own heat to cure. Or the process creates heat due to the chemical reaction. I do some glass bedding of gun stocks. Doesn't matter how thick the void to fill is. Some do use JB Weld for that too. I think I have once or twice too. Link to comment Share on other sites More sharing options...
Manche757 Posted September 11, 2020 Share Posted September 11, 2020 53 minutes ago, 75sv1 said: I do some glass bedding of gun stocks. Got a pic or two? Link to comment Share on other sites More sharing options...
Dzimm Posted September 11, 2020 Share Posted September 11, 2020 Yeah it should cure just fine being thick. I've seen a few people make small engine heads and piston rods entirely out of JB weld to test it. They were pretty thick and completely cured all the way through overnight. Link to comment Share on other sites More sharing options...
75sv1 Posted September 11, 2020 Share Posted September 11, 2020 23 minutes ago, Manche757 said: Got a pic or two? Of the glass bedding or the rifles? I don't have any pics handy. I have a Mauser and some Arisakas done. Link to comment Share on other sites More sharing options...
Manche757 Posted September 11, 2020 Share Posted September 11, 2020 10 minutes ago, 75sv1 said: Of the glass bedding or the rifles? What are you accomplishing? Increased accuracy? Extending life of the stock? Link to comment Share on other sites More sharing options...
75sv1 Posted September 11, 2020 Share Posted September 11, 2020 8 minutes ago, Manche757 said: What are you accomplishing? Increased accuracy? Extending life of the stock? On these stocks, I had to repair flaws in the semi-inlets. The Mauser had a crack in it. I hogged it out and wrapped it up with surgical tubing. The type -77 has some issues with knots and such. The Type -38 doesn't have much of a recoil lug. Its a 'D' shaped tube on the original that a round post mates into. I made a block with a hole in it. I epoxied that in place. I think I used JB Weld on that. My inletting was great on these either. So, I used the bedding to fill some voids. If used right glassing can help with accuracy. I did try on the Mausers to use a mandrel to keep the action straight, when bedding. I also tried to get one of the inletting screws to contact the mandrel, so the tang was support. Link to comment Share on other sites More sharing options...
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