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Nichrome Wire

Discussion in 'Electronic Basics' started by sparky72854, Jun 4, 2007.

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  1. sparky72854

    sparky72854 Guest

    I just want to share this with the group.


    I have been using nichrome for resistors and foam cutting. The best
    souce I have found for small quanities is PnJ Resources, LLC.

    Sparky
     
  2. Are you the same guy that asked about making one a while back? If so I
    suppose you were successful? Could you explain what happened and what you
    learned for the rest of us?

    Thanks,
    Jon
     
  3. sparky72854

    sparky72854 Guest

    No Jon, I am new to posting google forums, I am more of a reader. I
    did search the archives here and other places about making foam
    cutters and resisters. I hope in the future I will be able to post on
    more helpful issues.

    Thanks,
    Sparky
     
  4. notbob

    notbob Guest

    What's to research? Get some wire and a variac, turn the variac up to
    where the wire is hot enough to cut, and get to cutting.

    nb
     
  5. Rich Grise

    Rich Grise Guest

    I didn't even use a variac - I used a wall wart, and just cut the wire
    to the right length for the volts/amps/power I wanted.

    I never made a foam cutter - I just held the alligator clips in my
    hands and cut some foam just to see if I could do it. FWIW, it was
    a 7.5V,1A wall wart and about 9" of #36 nichrome advertised as "28
    ohms per foot" or some such.

    Cheers!
    Rich
     
  6. In what country?
     
  7. notbob

    notbob Guest

    Dang, that's a BIG wallwart! ;)

    nb
     
  8. I did a similar experiment with some nichrome wire from a soldering iron...
    it was actually kinda beautiful experiment cause the wire would glow and
    fade and if breathed on it some parts would cool off. It got hot enough to
    cut some plastic.

    I still have this idea to use it and that PnJ's site has that 11$ sampler
    that looks like it will come in handy.

    Jon
     
  9. Rich Grise

    Rich Grise Guest

    2"W x 3"H x 2"D.

    It's only 7.5 watts, after all. No-load, it puts out about 10V.

    Cheers!
    Rich
     
  10. JeffM

    JeffM Guest

  11. JeffM

    JeffM Guest

    Thank you for your courteous response to my pedanticism.
    I find than making someone aware
    that he is posting to a *distributed* network
    and that what he sees on Google is NOT what *everyone* sees
    can make him a better poster.

    True, the OP has lurked and is doing a good job of emulating the norm,
    but a few extra facts never hurt. The Wikipedia article
    also covers a lot of ground beyond Google's interface.
    Again, thank you for your mature, well-reasoned response.
     
  12. And theres no place here for a pedant.

    1. a person who makes an excessive or inappropriate display of
    learning.
    2. a person who overemphasizes rules or minor details.
    3. a person who adheres rigidly to book knowledge without regard to
    common sense.



    Atleast you admit you are one.
     
  13. Don't be silly. Of course there is room here.
    I am more likely to kill file those who are unhelpful while
    being rude. My day doesn't need that.
     
  14. No no... we have to many of them. Theres no room.
    Thats your choice...
     
  15. Grostle News

    Grostle News Guest

    I needed a hot nichrome wire for cutting but didn't know where to buy or
    even how to hook-up and calculate power-heat dissipation etc.

    So I found an old portable electric heater someone threw out in the
    garbage and took the "guts" out and laid on the gypsum surface side of a
    piece of drywall (also found as refuse). I carefully straightened out
    one of the coils of nichrome, stretched and mounted it on and between
    two small, flat stacks made from pieces of cut drywall glued together. I
    could then operate the rheostat to adjust the heat intensity of the wire
    for cutting.

    The problem with my "Stupid Man's Way" cutter solution was that the
    entire coiled nichrome heating element was heated up and drew power and
    current in excess of what was needed for the smaller cutting portion of
    the wire. But since it was used for only one or two small jobs, the
    impractical points of operation weren't worked out for improvement.

    It was years ago that I used the makeshift cutter. The damned, clumsey
    thing is still sitting near my work bench, I can see it now while I
    write this message, a monument to my lack of knowledge in electronics
    and electricity.

    gn
     
  16. Chuck

    Chuck Guest

    Ebay is a good source of nichrome wire
    in small lengths and a variety of AWG.

    Prices are reasonable.

    Chuck
     
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