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Acrylic Drilling?

post #1 of 5
Thread Starter 
Hi Everyone,

I currently have 2 pieces of cast acrylic that are precut into 1 x 2ft and are 1/4in. in thickness.

I want to drill some screw holes into them for making a wall mounted shelf (need to hold max 20lbs). I will be mounting them on top of each other to make a total of 1/2in thick acryllic to put some stuff on.

I just want to ask, if there is specific precautions in drilling acrylic. I read up that one need to use a special plastic drill bit, not just a regular one. but some others say that any drill bit is ok as long the acrylic is properly cooled and is drilled at low speed.
So i want to know, what is a safe way to drill into acryllic without cracking it?

All Help will be appreciated,
Thank You
BlackDog
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BlackDog
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post #2 of 5
20lbs on it mite break it. get good bits home depot has them plastic bit drives the it faster cleaner. 2-4 dollars.
Dyslexia
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Dyslexia
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post #3 of 5
take it slowly. Use lithium grease or similar to dissipate the heat.
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My do-it-all rig
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post #4 of 5
Bi-Metal drill bits seem to work pretty well for hole sizes up to ~3/8", though you have to step up the hole size very slowly; with larger hole sizes you're better off with a hole saw or spade bit, since a bi-metal bit of that size will easily chip the acrylic.

Whenever you drill you really want to clamp it down to the work table and have some wood underneath it for support. I typically use water as a lube/coolant when drilling acrylic (particularly when using a hole saw) since this results in a much smoother finish on the inside of the hole than when cutting dry; I don't recommend oils or greases as lube/coolant since they can attack the acrylic and affect the sheen of the panel.

In terms of the shelf material, I think you'd be better off getting a piece of 1/2" or 3/4" acrylic. Probably the best thing to do would be to go to your local sign shop/maker; they often have decently sized scrap pieces they may give or or otherwise would sell you for a reasonable price.
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RAD GT
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post #5 of 5
Thread Starter 
oh cool,
thanks everyone
i found that the acrylic can support my stuff (the laptop i'm putting on it turns to be less than 10lbs, so i'm 100% good)

time to go to the drill
BlackDog
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