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Old 27th Jan 2020, 8:39 pm   #2
Radio Wrangler
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Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 14,566
Default Re: Cutting perfect circle in acrylic

To clear up ambiguity, do you want a perfectly circular hole in a piece of perspex, or do you want a perfectly circular disc of perspex?

Perspex can me machined, but needs care over speeds and feeds to avoid chipping the edges or shattering everything.

A local machine shop could turn you a disc. If a centre hole is wanted, then things are easier, if not then it's a double-sided tape job. I can do 12 or 13 inches in the gap bed of my lathe. If you want a circular hole, then a router on a trammel is a possibility but revs need to be controlled and feeding has to be very steady. A shallow cut from each side and then a deeper cut etc until the disc breaks out. Tidy up with abrasive paper then rubbing compound and perspex polish.

Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
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