Reply by JJohnston

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Posted on Cutting a circle with my router?

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1622 posts in 3284 days

#1 posted 06-11-2010 02:05 AM

The method and jig described by Gerry and shown by sandt38 are the same, and they will work perfectly for the hole you want. Here’s a hole 6.25” in diameter in 3/4” plywood I made just last night for a downdraft table, using the commercial version of sandt38’s jig as shown. It’s adjustable in 1/8” increments. You’ll need some kind of sacrificial pad under the ply (I use Homasote) to allow the bit to go all the way through, and to provide some friction so the center of the hole doesn’t shift as you cut it free right at the end of the cut.

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