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Old 03-18-2011, 06:25 PM
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Brian Martin,Freelance adviser
 
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MIG brazing

Just set up one of our Miller 130's at the shop for brazing. Very cool, took me a while to figure out why it was giving me birds nests every few minutes but figured out the wire feed pressure was way too high (barely pushing the wire is how it needs to be) and it works SWEET!

Any of you use one?

Brian

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Old 03-18-2011, 07:40 PM
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I have been using a Linde 160 mig for brazing up broken/damaged engine blocks for years. I was amazed when I first saw it done. Now I would rather use the braze than nickel rod anytime..
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Old 03-18-2011, 09:03 PM
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Brian Martin,Freelance adviser
 
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What size wire do you use?

Brian
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Old 03-18-2011, 09:24 PM
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Can you give anymore details? I have never heard of such a thing.. Sounds interesting.
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Old 03-19-2011, 03:51 AM
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I use .030" For blocks and heads. I "V" out the area. Pre heat the item in oven at around 500 degrees. Then wire brush and fill area with silicon bronze material. On showy stuff I then grind to surrounding surface. Shot peen area while still hot with cast shot.. Actually I let the item cool as it is being shot peened in the machine. A little cast blast paint and the repair disappears.

Only problem with this. Is trying to drill and tap. The stuff is very tuff. New 3 flute tap required to touch the stuff..Mostly Chevrolet broken starter ears.

My neighbor bought a Chevy 348 W- tri power motor. Had water left in it in Michigan. Freeze cracks everywhere. I think there was more bronze in the thing than iron when it was done. I would have scrapped it but he wanted "numbers matching" for whatever reason.. Engine went into a hot rod Ford anyways.. Still running..

Last edited by BOBCRMAN@aol.com; 03-19-2011 at 04:13 AM.
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