How to cut a decent circle in plastic?

Old 11-18-23, 08:00 PM
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How to cut a decent circle in plastic?

I'm wanting to cut a reasonably circular hole (about 8" diameter) in the side of this:

What is the easiest way to do this without it looking like a butcher job? Preferably without power tools.
Old 11-18-23, 08:08 PM
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Mark your circle with a sharpie and then cut it with a tin snips. Use a knife to cut a small hole in the center to give the tin snips a place to start cutting.

An offset left turn snips will work best.
Old Yesterday, 05:29 PM
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Draw out your circle in the desired location and then score it (go over the circle lightly) with a hobby knife like an xacto. Then take a slightly larger blade that you don't mind messing up and heat it with a torch/lighter. Then quickly cut out of much the arc as you can before it cools, then reheat it and do it again. The hotter it is, the better it will go through it like butter and you won't have to worry about it going off course or having to push hard. An xacto blade should work but you might want to use something a little bit larger if you want to go quicker.

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