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Old 05-21-2019, 10:06 PM   #1 (permalink)
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Using JB weld to weld parts together?

Using JB weld to weld parts together?

I am wondering about using J-B Weld to mate aluminum parts together.

Having aluminum parts Welded is quite expensive so I'm looking for alternate options. I'm thinking I could cut grooves where the JB weld would be applied.
Hopefully this would be adequately strong.

This would allow me to complete projects without expensive aluminum welding.
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Old 05-21-2019, 10:22 PM   #2 (permalink)
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Depends on what you are expecting from the bond, but it can be successful in certain applications. Brazing is also an option for a handful of applications if you have a torch.
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Old 05-21-2019, 10:32 PM   #3 (permalink)
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I have successfully used JB weld to hold things together, such as a stripped feedneck. I have used it in automotive and "rigged" applications as well as other epoxy compounds. I would say that in a general sense, if the part isn't depending on this for structural rigidity alone, as in supported in an "other" physical way, then yes, it works pretty well as a sealant or glue to keep things from separation. It will depend on some manner of joint being there to begin with, a socket as it were.
Taking two bits of flat metal and expecting a seam joint with JB Weld to hold them together. I would not count on that.
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Old 05-21-2019, 11:25 PM   #4 (permalink)
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Short answer, no.

Long answer, check for the last thread where this was asked.
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Old 05-21-2019, 11:26 PM   #5 (permalink)
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I want to attach a mag-well to a tube. The good radius should provide strength. Also jb could be used to locate/ test before welding.

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Old 05-22-2019, 08:55 AM   #6 (permalink)
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Also jb could be used to locate/ test before welding.
Be careful with that because if some JB weld (or any other contamination) remains on the part when you weld, you will have some big problem.
Aluminum is extremely sensitive to impurities, make sure to clean it with high end sand paper (no abrasive griding I ng wheel) and clean it with acetone and alcohol before welding.

Im a TIG guy and I used to make aluminum cabinet for shops.
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Old 05-22-2019, 09:16 AM   #7 (permalink)
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I want to attach a mag-well to a tube. The good radius should provide strength. Also jb could be used to locate/ test before welding.

https://propaholics.wolfchasers.com/...op%20After.jpg
This looks like steel. Are these the parts you're going to join?
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Old 05-22-2019, 10:27 AM   #8 (permalink)
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Quote:
This looks like steel. Are these the parts you're going to join?
this is a sample pic. I intend to use alluminum.
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Old 05-22-2019, 10:39 AM   #9 (permalink)
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not sure if its viable in your situation but I cut and put a kink on one of my phantom feeds, to get the two halves to hold well I used some rough grade sandpaper to scuff up the area I was applying the JB weld and I used hockey tape (kind of an open fiber tape) to make a cast over the parts where they were joined together. basically wrap some tape, slather on some JB, wrap some more tape, slather on some more JB, rinse and repeat till you got a few layers, the JB will permeate the tape and hold a much stronger bond that can take a lot of extra abuse vs JB alone.
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