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ever cut glass with a plasma cutter?

Discussion in 'The Hokey Ass Message Board' started by 55 dude, Dec 18, 2006.

  1. yesterday i was talking to a friend and he asked me if i was familiar with a plasma cutter. i told him yes then he said "those thing will cut just about anything". he then told me that he had been cutting GLASS! with one. WTF! what kind of pills have you been popping dude! get this after i figured out he wasn't fucking with me he said this is how he did it: took some alluminum foil,glued it to the glass with spray adhesive, marked where he wanted to cut, clamped on the ground cable and cut the glass! he said it worked great and would probably work great for windshields. ok someone give it a try and post your result preferably with pic's.:cool: :D
  2. ratstar
    Joined: Feb 22, 2005
    Posts: 1,313


    I havent ever heard of it, but thats not to say it cant or hasnt been done. I wouldnt want to try it out first though! lol
  3. Gigantor
    Joined: Jul 12, 2006
    Posts: 3,805


    You gotta be pullin' our chain, right??!? This says dangerous and wrong in oh-so-many-ways. If it works I will be floored and question everything I ever heard about what you can or can't do with such and such tool to such and such material.
    ...come on... no way.
  4. Nads
    Joined: Mar 5, 2001
    Posts: 11,606

    from Hypocrisy

    Sounds pretty far fetched to me, next you'll be telling us you can make shoes out of plywood.
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  5. roaddevil
    Joined: Mar 23, 2001
    Posts: 339


    i still think he got into some bad dope....
  6. Well,,,,I just discussed this with one of the welding instructors here at work.
    He feels it might work,but also feels the aluminum foil will burn away too quick when you first pull the trigger.
    Ive got 2 pieces of glass from a medicine chest at home,& we'll be trying to cut it up tomorrow.
    Joined: Jan 13, 2004
    Posts: 2,750


    I cut a real big one in the tub last night,and I didn't use aluminum foil.But it did leave a ring around the edge!
    Joined: Aug 29, 2004
    Posts: 389


    This i just have to see.....I aint buying it
  9. the-rodster
    Joined: Jul 2, 2003
    Posts: 6,582


  10. Some plasma cutters will "light up" without having the ground connected, but the arc is between the inner tip and the outer tip piece. It's a weak arc though and the tip burns itself up pretty quick though. I know because a few times I started cutting sheet metal when I had forgotten to hook up the ground cable on my plasma cutter. It cuts, but cuts crappy and it ruined the tip in about 30 seconds. I think they do that feature so that you can keep the arc going when you're cutting things like expanded metal or perforated metal so that it doesn't have to restart the arc over and over.

    I have plasma cut through concrete backer board a few times kind of by accident. Sometimes I'll put a scrap of that 1/4" thick fiberglass filled concrete backerboard stuff (it's used a backer for doing tiles on floors or countertops) behind a piece of thin steel just to support it or to keep from burning holes in something underneath and if the cut accidentally goes across the DuraRock stuff, it actually melts the concrete board and cuts it. It's kind of cool. It looks like black obsideon where it melts.

    So, yeah, it might be possible, but with the foil, I bet he's just ruining the tip on the plasma cutter. Putting a thicker piece of sheet metal instead of foil might work. It seems like the spray from the plasma could come back and hit you in the face though, so I wouldn't want to try it.
  11. Nads
    Joined: Mar 5, 2001
    Posts: 11,606

    from Hypocrisy

  12. budd
    Joined: Oct 31, 2006
    Posts: 3,479


    i have cut ceramic glass with a plasma..i layed a piece of 26 gage on top to keep the arc going..if your familiar with ceramic glass you will know its the glass used in wood stove doors and gas stove doors now days..its the only kind of glass that can be spot heated and not explode..but anyway the glass did cut, or should i say melt/vaporize away but not in a way you could ever use it..a total mess really and the i had a sore throat for a week after...mith busted in my opinion.
  13. I guess we WONT be cutting glass tomorrow!
  14. brekteffect
    Joined: Sep 24, 2007
    Posts: 51


    A friend of mine said he watched a couple of guys cut a windshield down and they used a hose and just sheeted water over the glass for a conductor. Probably want to make sure your not standing in the puddle!
  15. 81ttopcoupe
    Joined: Feb 10, 2005
    Posts: 398

    from Cedar Park

    I was told to use a piece of the metal tape the AC guys use for ducts. It's thicker than foil and has the adhesive already. Never seen it done myself.
  16. Little Wing
    Joined: Nov 25, 2005
    Posts: 7,496

    Little Wing
    from Northeast

    would seem if you can complete the circuit anything is possible
  17. Slick Steve
    Joined: Dec 4, 2007
    Posts: 318

    Slick Steve
    from Indy

    I mean really, just use glass scissors...duh :)
  18. Hackerbilt
    Joined: Aug 13, 2001
    Posts: 6,236


    Anything is worth a try...but I doubt it could work on a tempered glass like you might find in a medicine chest or the side windows of a car. Ka-BOOM!
    Double plate laminate might be tough too! The aluminium duct tape just might be the deal to use as a conductor though.

    Someone suit up and give it a shot!!!!!
  20. buckeye_01
    Joined: Jun 20, 2005
    Posts: 1,441


    You can't?^^^

    I certainly wouldn't be the one to try it out either. It just screams dangerous.
  21. Hackerbilt
    Joined: Aug 13, 2001
    Posts: 6,236


    All cutting has the potential to be dangerous.
    You can get all kinds of sparks and molten bits flying around doing a plunge cut with Ox/Act cutting torches.
    To try this on glass with a Plasma kit your just gonna come in off an edge! I'd give it a shot without blinking an eye.
    Of course I WOULD be dressed for the exposed flesh and a good face shield over my cutting goggles.

    I'm always amazed at how little respect people have for cutting and welding equipment and the damage they can cause now that MIG and Plasma have become common. Tack welding in Tee shirts with your eyes closed etc...your just asking for a painful lesson.
    Thats why people fear it.

    The bare minimum I wear is a good pair of coveralls, leather gloves, tightly laced steel toe boots and a self-darkening mask.
    Thats the way I was tought by professional people I looked up too...and I can't see me changing any time soon...LoL
  22. hoof
    Joined: Jul 14, 2006
    Posts: 620


    I can't believe this thread popped up, I was just thinking about if this would work. I thought about sandwiching the glass between two thin sheets of metal?
  23. lippy
    Joined: Sep 27, 2006
    Posts: 4,232

    from Ks

  24. temper_mental
    Joined: Oct 22, 2006
    Posts: 2,718

    from Texas

    I call bull shit the heat should crack the glass not to mention the foil would burn and blow apart. If someone tries good luck I will not take a chance with that one. I have a good glass guy I use. My 2 cents
  25. temper_mental
    Joined: Oct 22, 2006
    Posts: 2,718

    from Texas

    Have you ever tried to cut two pieces of metal sandwiched together to save time? I have it makes a terrible cut if that. Make sure you use a protective hood and a leather apron could get interesting and hot. My last 2 cents
  26. 296 V8
    Joined: Sep 17, 2003
    Posts: 4,672

    296 V8
    from Nor~Cal

    this is from 2006 WTF:confused:
  27. red3
    Joined: Mar 14, 2009
    Posts: 186


    I have some kevlar body armor if anybody wants to try it. It should stop the exploding glass.
  28. Graffiti32
    Joined: Oct 9, 2005
    Posts: 392

    from Illinois

    I think I would keep a dust pan and a broom handy.:D
  29. RichG
    Joined: Dec 8, 2008
    Posts: 3,918


    I'd be really suprised if this was true, I would think that the glass would not be able to conduct the heat quickly enough, causing serious thermal stress, leading to separation (cracking)

  30. Diavolo
    Joined: Apr 1, 2009
    Posts: 807


    Someone please promote this dude to grenade inspector?!?

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