Annular cutters or drill bits?

How about a trepanning tool ?
 
Just like a boring bar . Wanna pic of one ?
 
Well...……..hold on a few seconds , I'll find one or 2 .
 
This is one of many . Easy to make and always comes in handy for large holes in thin stuff . :) Measure across your tool and drill and subtract 1/2 the drill diameter and you got your hole radius .

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General Tools Adjustable Wheel and Circle Hole Cutter for use with drill press 6 - The Home Depot

General Tools Wheel and Circle Cutters produce precision circles in sheet metal, brass, copper, soft steel, aluminum, plastic, wood and composition materials. The cutter is the ideal tool for making clock
www.homedepot.com

This brand has a few options
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General Tools Heavy Duty Adjustable Circle Cutter for Drill Press 55 - The Home Depot

Designed for professional use, the Heavy-Duty Circle Cutter will make clean cuts from 1-3/4 in. Dia to 7-7/8 in. Dia. The tempered steel body features marked graduations on the beam for fast measurement
www.homedepot.com
 
mmcmdl said:
This is one of many . Easy to make and always comes in handy for large holes in thin stuff . :) Measure across your tool and drill and subtract 1/2 the drill diameter and you got your hole radius .
Click to expand...
Man, that's really beautiful! Not the tool, but the counter top. It's exactly like ours.

Tool's not bad either. Gonna get one.

Regards,
Terry
 
They come in handy . :encourage: Plus , use them in a mill , on a drill press , or a lathe . Bet your countertop is emptier than mine ! :grin:
 
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I've used diamond coated hole saws like this to bore holes in fiberglass. They create nice clean holes.
Don't know about acrylic, but I imagine they would be fine. I use some water to keep the temp. down
and, with fiberglass, to eliminate dust.
 
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