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Thread: Spot welder lower tong mods

  1. #51
    Gunco Veteran AK Builder FloridaAKM's Avatar
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    I retapped the threads and since there was not much stud left on the tip, I soldered the tip in place and it worked beautifully so far.

    Now on to getting a small mill....................

    Quote Originally Posted by Winn R
    You can reuse the old tips by retapping.

  2. #52
    redchevyman's Avatar
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    this thread should be a sticky
    Buy your US made AK-47 compliance parts here.
    Best price on US made AK parts! also $5 flat rate shipping .
    http://www.rcmgunparts.com/

  3. #53
    Chief Administrator 7.62x39's Avatar
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    The library copy is a sticky
    .

  4. #54
    Gunco Member FordGalaxy's Avatar
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    Ok just to set the record straight Aluminum is an exellent choice for makeing a lower tong.

    Which is why I made the lower tong for my spotwelder out of aluminum.

    Aluminum wire is currently used in construction both in residential and commercial work, as long as all of the connections and breakers are listed ALCU and an anti oxidizing agent is used on it.

    The difference in resistance for MCM 600, which is .626 in\2, .001" bigger than 5\8 round stock.

    copper .0223 ohms per 1000 feet
    aluminum .0353 ohms per 1000 feet

    For a tong less than 1 foot just move the decimal point 3 places to the left.

    copper is a better heat conductor than aluminum, but not that much better most heat sinks are aluminum.

    5/8 round aluminum with a tweeko tip I cut the threads off of and pressed into a hole I drilled in the aluminum works great.

    Soon as I figure out how to post a pic I'll put one up.

    Ok got it

    and yep licensed electrician
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  5. #55
    Chief Administrator 7.62x39's Avatar
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    More on spot welding rails.

    Keys to Achieving Good Spot Welds
    .

  6. #56
    Gunco Member leopold stotch's Avatar
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    Quote Originally Posted by 7.62x39 View Post
    I found a conductivity chart.

    Where copper is rated at 89.5 to 100% depending on the type, Aluminum only rates 30-50% depending on the alloy.

    http://www.amm.com/index2.htm?/ref/conduct.HTM
    Your numbers are correct, however the the conductivity of most mild steels is anywhere from 1/3 to 1/4th that of Aluminum. Aluminum is commonly used for large gauge electrical wiring where copper would be too heavy or too costly. It is a poorer conductor than copper but a much better conductor than steel. If you have a home built in the last twenty years or so then the drop from the power company to your house is almost certainly aluminum. It was used for interior house wiring in the 1950's and 1960 and got a bad rap for causing fires. It wasn't the aluminum per se that was the problem but the fact that the connections were being made to materials that had a significantly differently thermal expansion coefficients. Thermal cycling due to current draw caused the connections to loosen up over time, eventually causing a fire.

    If you wanted to use Aluminum for a set of tongs I would think that the only trouble might be its relatively low melting point and the fact that it starts to loose significant strength at a relatively low temperature. It would probably work fine as long as you didn't let it get too hot.

  7. #57
    Gunco Rookie maxposner's Avatar
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    If you don't come up with the barstock, wasn't one person selling a piece of flattend tubing?

  8. #58
    Gunco Member GeneT's Avatar
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    I made a tong out of 1/2" Cu pipe and just flattened and bent the business end. Drill and tap for your tip and you're good to go.

    Not as nice as the mods in this thread, but certainly usable.


    GsT

  9. #59
    Gunco Rookie maxposner's Avatar
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    was it 1/2" tube, did you use mig tips for the electrode ends

  10. #60
    Gunco Regular shotgunner's Avatar
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    Quote Originally Posted by maxposner View Post
    If you don't come up with the barstock, wasn't one person selling a piece of flattend tubing?
    Hi, maxposner There is a guy on another forum selling one.
    I think his is made from tubing with a mig tip.
    http://www.gunsnet.net/forums/showth...ot+welder+tong
    I just thought you got your forums confused, I do all the time.
    I will be looking for a post on one forum, only to stumble accross it on another forum.

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