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Old 12-09-2017, 04:33 PM   #1
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Default TIG welding aluminum

Welp, I boogered up a pin hole in my AR-10 lower. Looking to get it filled in so I can re-drill. Anyone got a TIG and want to make a few bucks for 15 minutes work?
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Old 12-09-2017, 06:16 PM   #2
 
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If you want to drive it to Elgin I can. I need to clean up my gas fume mess first. LOLOLO
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Old 12-10-2017, 02:44 PM   #3
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Get back to me with a price and when timing is good.
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Old 12-10-2017, 04:24 PM   #4
 
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I need to see what you need done but I put the tank and fuel lines back in my truck so it moves/won't blow up. Mainly nights and weekends.
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Old 01-03-2018, 01:51 PM   #5
 
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You can send it to me if you want
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your local welding and plasma cnc dude
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Old 01-03-2018, 02:24 PM   #6
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Sadly, I am not looking for anything that complicated or beautiful. I have an 80% AR-10 lower that has a 5/32 hole in the wrong location. This needs to get filled up so I can redrill in a less wrong location. The gold rod up front goes through the one hole I'm looking to weld up.



Please note, stock footage NOT my AR lower. I do not have a 3 hole lower in any way shape or form.
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Old 01-03-2018, 07:10 PM   #7
 
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Do know what type of alloy it's made of? If it was mine I would try to plug the hole with like material tightly then try to weld it up. The body looks thin in that area. Keeping the heat down would be key.
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Old 01-03-2018, 08:17 PM   #8
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Pretty sure 7075. I was thinking copper block on the outside as needed.
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Old 01-03-2018, 08:21 PM   #9
 
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Pretty sure 7075. I was thinking copper block on the outside as needed.
Better double check that. 7075 is considered unweldable
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Old 01-03-2018, 08:57 PM   #10
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well, shit it is 7075. Guess I need to get a drop in pack and/or try epoxy. There goes a few $$$.
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Old 01-03-2018, 09:00 PM   #11
 
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Maybe someone can turn a round slug for you in a lathe then just press it in
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Old 01-03-2018, 09:38 PM   #12
 
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You can actually weld 7075/2024 aluminum. The risk is stress corrosion cracking after weld has been made. Depending where repair is made you run the risk of a fracture along the weld after the fact. You would be hard pressed to find any sort of shop to make this repair.
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