enlarging holes in fiberglass or acrylic

I would use a Dremel with a small router bit. Easy to control and always useful.

Pete

Quote:

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Originally Posted by Tonto

this is what I am looking at but still has limitations
https://www.woodworkforums.com/attach...9&d=1544093425
51mm – 178mm -- actual size will be 2" to 7", or 50.8 to 177.8 mm
6.4mm increments -- it will be 1/4" (= 6.35 mm ) increments

6mm increments is still a sizeable gap. hence why I am asking for widening ideas.

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so drill a hole in a piece of thin ply or MDF that is 3-3/4 in (= 95.25 mm) diameter. Then use a straight cutter and guide bush on your router using the 3-3/4" dia hole as a template.