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Discussion in 'NFA & Class III Discussion' started by Hump66, Aug 17, 2012.

  1. mr ed

    mr ed Sharpshooter

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    if your not getting at least a medium cherry red your not hot enough. propane torch won't get it. takes acetelyne to do it.
     
  2. Hump66

    Hump66 Sharpshooter

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    MAPP gas torch
     
  3. tyromeo55

    tyromeo55 Sharpshooter

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    If your really using high temp silver bering solder then that is not going to get hot or focused enough. If your in the Tulsa area I have a an acetylene brazing torch if you want to try it that way
     
  4. Hump66

    Hump66 Sharpshooter

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    I'm in Edmond. It's getting hot, I just don't think I'm getting it hot enough, barely a red glow. I can go hotter, just wasn't sure how red it needs to be. The solder I got melts at 1250* so the MAPP gas should be g2g.
     
  5. tyromeo55

    tyromeo55 Sharpshooter

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    If the solder is not sticking then your not getting the part hot enough ( possibly not clean enough too). If your hell bent on mapp gas then look into a turbo torch.

    Here is the first result of a super quick search. reading it might shed a little light http://www.motoredbikes.com/showthread.php?33621-Brazing-steel-with-mapp



     
  6. bettingpython

    bettingpython Sharpshooter

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    Just because mapp will get that hot doesn't mean you have enough volume going on to get the localized area hot enough, the rest of the barrel is acting as a heat sink and soaking up the energy before it rises to the level you need in the localized area.

    A butane torch will hit 2600 farenheit but the little hobbyist models don't have enough volume to brass braze a radiator repair... I know.

    I could silver solder AC joints when setting new compressors with a mapp torch when the Oxy/acetylene rig was out of gas, but it sure was slow and painful. That thick walled barrel is going to soak a lot more heat up than the copper tubing in an AC line set.
     
  7. Hump66

    Hump66 Sharpshooter

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    Does this look like it's getting hot enough?

    [Broken External Image]

    **edit**
    It must have been hot enough because I can't remove the QD mount without possibly damaging other parts of the rifle.
     
    Last edited: Sep 3, 2012
  8. HiredHand

    HiredHand Sharpshooter

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    It looks like the FH is getting hot but I can't tell if the barrel is getting hot enough. If you decide to order the tepilaq then i'd get some heat stop paste, too.
     

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