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  1. Member Since
    Oct 2005
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    346
    Nov 22, 2005, 12:08 PM - Cutting sintra? #1

    I've read a few posts here on the best way to cut sintra. It seems like the exacto knife method would be murder on my hands. I used a cutting wheel on my dremel, but it gave off terrblie oders. I'v eread that those fumes are toxic as well. My question is, how toxic are they? If I was just making a few cuts in my garage and then left everything until the fumes went away, how much danger is there? I figure I'll only be inhaling them for a couple of minutes. Any advice how to avoid inhalation all together?

    I'm also concerned with sanding. Dust the sintra dust pose any additional problem? I do wear a cheap breathing mask when sanding to keep the dust out of my lungs, but is the residue on the garage floor dangerous?

    Thanks guys!

    Eric
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  3. Prymer13's Avatar
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    Nov 22, 2005, 12:50 PM - Re: Cutting sintra? #2

    Ok bro, here goes:

    Your best bet hands down, is a stanley utility knife ($4-11 @ any Lowes, Home Depot, etc). IF you use a straight edge and score it then progressively put more pressure in you will be fine.

    The fumes from cutting and heating the sintra are indeed toxic and a RESPIRATOR is highly suggested. A regular dust mask won't cut it. The dust isn't too bad, but I'd make sure to sweep up afterwards with the door open and mask on. Whenever I clean up I use a mini vac and it helps.

    The main reason to stay away from a cutting wheel: it melts as it cuts, so any "lines" that you are following will have to be trimmed anyways with a knife or file. Might as well use the knife from the begining.
  4. J ROCK's Avatar
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    Nov 22, 2005, 1:34 PM - Re: Cutting sintra? #3

    Kibosh,


    Prymer13 is pretty much right on. I used a regular cheep mask when boiling Sintra and had a sore throat afterwards.....invest in a good respirator. As for cutting, I cut out my armor from 1/4 inch Sintra using a Jigsaw. It worked well because it was fast and it didn't melt anything. I cut it all outside! I used a file and sand paper afterwards to clean up the cut, again, outside. Turned out pretty nice. The thing about the fumes is that you can't see or smell anything. I usually eneded up with a soar throat like I mentioned (Before I read that it was dangerous). It's not worth taking the risk. Work with it outside and buy a good quality mask. Sometimes the masks will say on them what type of particles they will filter, mine had a valve on the front.
    J-ROCK
  5. Member Since
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    Nov 22, 2005, 2:17 PM - Re: Cutting sintra? #4

    Thanks guys. We're getting into the Michigan winter months so working outside doesn't sound too appealing...

    How much should I expect to pay for a respirator???
  6. Prymer13's Avatar
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    Nov 22, 2005, 2:56 PM - Re: Cutting sintra? #5

    This is like the one I have, I believe it goes for around $40 or so...small price to pay for safetly

    http://multimedia.mmm.com/mws/mediaw...oooBQ4_rOOOOm-
  7. lilburndiablo's Avatar
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    Nov 22, 2005, 10:37 PM - Re: Cutting sintra? #6

    Quote Prymer13 said:
    This is like the one I have, I believe it goes for around $40 or so...small price to pay for safetly

    http://multimedia.mmm.com/mws/mediaw...oooBQ4_rOOOOm-

    I agree with Prymer on this. Your health is your wealth.
  8. Member Since
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    Dec 7, 2005, 7:24 PM - Re: Cutting sintra? #7

    Man. Cutting sintra with a utility knife is SOOOO easy. I have no idea why I had reservations about doing it. Like Prymer said, just score with progressivley increasing pressure. 3-4 good swipes got me through 3 mm sintra without any pain to my hands.

    Of course, I'm only doing straights at this point. Curves may be more difficult.

    And watch your fingers! I came close a few times to accidentally shortening mine...
  9. Qman101's Avatar
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    Dec 21, 2005, 8:07 PM - Re: Cutting sintra? #8

    if cutting sintra with a jigsaw, do you need sanding?

    Qman
  10. Jodo Kast 2749's Avatar
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    Dec 22, 2005, 6:36 PM - Re: Cutting sintra? #9

    I use a scroll saw on mine. Minor sanding if any.
  11. Prymer13's Avatar
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    Dec 23, 2005, 6:19 AM - Re: Cutting sintra? #10

    I think the stroke of a jig saw is more abrupt...plus it causes serious vubrations to go thru the piece. Unless you have a scroll saw like JK (They have a much finer blade, and a stable work surface to brace your piece on) I would still use a knife.
  12. Qman101's Avatar
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    Dec 24, 2005, 4:56 PM - Re: Cutting sintra? #11

    I don't know prymer. i've got a jigsaw at home, and j-rock said he used a jigsaw to cut himself.
  13. Member Since
    Jan 2006
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    Jan 3, 2006, 11:40 PM - Re: Cutting sintra? #12

    What type of blade are you using on your scroll saw? I tried cutting sentra tonight and it seemed to melt back together where I cut. Do you have any tips for how to cut it and get a clean line that doesn't melt together?

    Steve

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