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Thread: drilling through plastic

  1. #1
    Maximum Bitrate jusatry's Avatar
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    drilling through plastic

    i have come upon a platic art supply case which i want to convert into my case. I want to mount my mobo and PS in there - but i am afraid that drilling small holes for the standoff mounting holes may crack the plastic. I have never really dealt with plastic before - its real thin though, maybe 1/8 - 1/16 of an inch. I was thinking of drilling a hole for each standoff and then epoxying them into the holes wince making them threadable would be really hard. Any ideas/suggestions?

    The main reason i want to use this case is bcause 1) its free (my gf is done with it, so now its mine!) 2) it is like a little briefcase and smaller than an amp, so mounting/removing would be easy - for maintenance and stuff.

    Anyway, any advice is much appreciated - thanks!

  2. #2
    FLA gospeed.racer's Avatar
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    Try using a dremel with a pointed bit. It will somewhat melt the plastic as you go and that will "seal" it a bit. Dont drill it until you have tried on a sample first, because it may shatter. Anyone that has drilled on a cd case will know what I mean. If you dont have a dremel, Im sure you can find a neighbor or friend that has one.
    2005 Ford Focus ST

  3. #3
    Maximum Bitrate jusatry's Avatar
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    i have one - its one of my favorite tools

    you think slows speed or faster would be better?

    You mean the bit that looks like a brill or the one that looks like the thiing in the matrix that breaks into zion? an oil drill type thing.

    thanks!

  4. #4
    FLA gospeed.racer's Avatar
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    I like the metal pointed bits, not the drill bits, more like a milling bit. Try to test on an old cd case to be safe, they are about as brittle as plastic can be.

    I just checked dremels site, I like this one:
    They say very slow speed for plastic. I was guessing high speed. They build it and know, so I would say listen to them!
    2005 Ford Focus ST

  5. #5
    Constant Bitrate gubon13's Avatar
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    something i learned a while back

    I was doing a project a while ago with lexan (same stuff they use to make bullet resistant glass) and I kept snapping the pieces. Tried using plexiglass and same thing. So I went to a plastics guy and he told me to file down the sharp ends of my drill bits by just scraping it on the sidewalk for a bit. It worked perfectly. It has so far worked on all kinds of plastics for me - haven't cracked anything in a few years. It's like turning a drillbit into a milling bit I'd say.



    One thing though, don't try this if you have titanium drill bits. You'll just end up tearing up your sidewalk...
    "Is Wayne Brady gonna have to choke a b@$#*??!!"

  6. #6
    Maximum Bitrate jusatry's Avatar
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    thanks guys!

    yea gospeed, thats what i was thinking too - so now the next question.

    do you think the best solution is guess/check til the hole fits the threaded part of the standoff and then epoxy it in place? what kind of epoxy is gonna work with brass and plastic? maybe i should use a washer/plastic/washer/bolt setup and glue that whole thing together....


    I just dont want my epia/HDD/powersupply flopping around in the case...for fear of fire and breaking YET ANOTHER computer/part


    any advice much appreciated as usual

  7. #7
    Variable Bitrate Banderon's Avatar
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    What to use to "glue" plexi glass or acrylic?

    Most of the stuff talked about there dries into a plastic-like composition.

  8. #8
    Maximum Bitrate jusatry's Avatar
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    Quote Originally Posted by Banderon
    What to use to "glue" plexi glass or acrylic?

    Most of the stuff talked about there dries into a plastic-like composition.


    will that stuff glue plastic to metal though? I understood that there was a chemical reaction between 2 pieces of plastic which bonded them together, but i want to glue plastic to a brass standoff....

  9. #9
    FLA gospeed.racer's Avatar
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    I would install the standoffs and use a nut and very thin (you wont have much room) washer. Then, epoxy over it to provide more resistance to loosening, plus a dab on the bottom side to prevent any grounding to your car.
    2005 Ford Focus ST

  10. #10
    Variable Bitrate Banderon's Avatar
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    Just cover it all with the stuff... It'll be like a metal standoff inside a piece of plastic.

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