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Thread: Tig Coolant--Water Soluble Oil Opinions

  1. #1

    Default Tig Coolant--Water Soluble Oil Opinions

    Hi all. We picked up our first tig rig a while back and are trying to get some half decent coolant in it. The whole rig was bough for not much, and the miller stuff is too pricey for my blood. No real concern with freezing, just need something to keep the algae down. I bought distilled water, but I also have some water soluble cutting oil I use in the power hacksaw. It's been keeping the algae away for years in that thing, and it's no where near a closed system. Soluble oil should also lubricate the cooler pump. Thoughts?

    tl;dr
    I've read to use the real deal miller stuff, too pricey.
    I've read to use RV antifreeze, I've heard it gels.
    I've read to use regular anitfreeze, I've heard it clogs too (doubt it).
    I've read to use bleach. Sounds hard on some metals.
    I've read to use water soluble oil. Doesn't seem like a lot of disadvantages other than only being a mediocre biocide.
    I've read to use water bed biocide. Seems like another good option.

    I'd love to just use what I have on hand and not run out and buy anything if it won't cause any issues.

  2. #2
    Join Date
    Dec 2016
    Location
    Helsinki, Finland, Europe
    Posts
    3,535

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    I wouldn't use water soluble oil but that's just me..

    Kemppi is making world-class welding machines but is not in the "coolant business" and they recommend 20-40%(propylene) glycol in water OR any other proven antifreeze

    I have been using straight distilled water for last 2 years as I forgot to add anything there and all the copper and tin seemed to have keep algae under control so far.
    But I would preferably need antifreeze for winter, shop can get to freezing temps occasionally depending on heater setup.
    Maybe next autumn..

  3. #3
    Join Date
    Dec 2008
    Location
    The Four Flags City
    Posts
    1,077

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    I would buy coolant. I used private label stuff but I would not even think of water soluble oil or bleach. Automotive anti freeze is not intended for the very small passages in a TIG torch and can plug them.

  4. #4
    Join Date
    Sep 2011
    Location
    Langley, British Columbia
    Posts
    1,242

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    We've run water-cooled tig torches for years and, yes, we tried at one time to go cheap on coolant. You
    can run regular antifreeze (diluted of course) but over time it tends to gum things up. Never tried anything
    else. We came to the conclusion many years ago that the Miller coolant is the best. Yeah it's a bit more
    expensive but if you don't have to mess with it a lot it's well worth the extra cost...
    Keith
    __________________________
    Just one project too many--that's what finally got him...

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