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Discussion in 'Workshop Tips and Secrets / Tools' started by Winginit, Mar 29, 2017.
Has anyone seen the video on Soldering and Brazing by Carl Pollex ? Is it worth the money ? ($50)
Geez, 511 views and no one knows anything about this video. :gig:
I guess the answer to your first question is "no".
Well the title is ambiguous after all.
I came here because I like soldering and brazing, my glasses have one arm soldered solid after a screw fell out walking down the street, stopped at a phone repair shop and fixed them myself, 4 years ago now, much to my family and friends annoyance!
I haven't done brazing for a long time and I opened the thread to learn, chat and maybe value add.
I never heard of it. Brazing and soldering are often times self taught. I learned as a teenager and of course being a master plumber blah blah blah I never needed a video.
Have you checked YouTube? Usually there's all sorts of DIY videos.
I can do basic wire soldering, and soldered my share of copper pipes. I can braze , at least I could the last time I tried it. Its been a while since I've needed to braze anything. What I would like to do is find how to silver solder or silver braze things made of aluminum and steel, especially tubing. I have seen a few excerpts from his video, but its kinda pricey. I've bought a lot of Covell videos and found them to be worthwhile, but I cheaper out so far on this video. Hoped maybe I could find a used one.
What I'm looking at is a way to join small steel and aluminum tubes. With all the factory style push on/quick connect fittings, I'd like to be able to save the specially formed ends and reattach them to new tubes. The tubes could be expanded to a slip fit and then low temp solderered into one new unit. I wonder if I could even use a Tig torch to control the applied heat ?
When I have a question about brazing and soldering I go here. www.lucasmilhaupt.com
I think a way to do it would be to "tin" the surface of aluminum with an aluminum braze product like http://durafix.com/ then fit it into a pretinned steel sleeve which would then be soldered to the aluminum with aluminum braze. The bond would be much weaker than both parent metals but given enough bonding surface stress could be kept low enough to do the job. Perhaps a better way would be to epoxy bond the two after proper prep or bond with a methylacrylate like plexus.
Thought this was interesting.
Don't you have to break the oxide coating to solder or braze aluminum? Good epoxy bonds in aluminum are fantastic -- one epoxy-bonded (and bolted) two-piece part I had to deal with for fatigue testing needed a cover plate machined off; the epoxy bond could not be broken, even after a good soak in liquid nitrogen.
If you want it to stick, probably. :gig:
Based on my rather old AWS book that is the job of the flux, be it chloride, fluoride, or borate based. I suppose AC TIG might do a passable job?
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