I recently needed to cut a 7-ft.-radius arc in a piece of plywood with a router. After thinking about it for a while, I came up with this wall-mounted router-compass fixture that lets me work at a convenient height on sawhorses.

I started with a 7-ft.-plus length of 3/8-in.-thick plywood, 6 in. wide, and added a bracket on one end to provide a surface to attach an ordinary door hinge. I mounted my plunge router on the other end of the plywood, 7 ft. from the center of the hinge. I then secured the hinged end of the fixture to a cleat on my garage wall at the same height as the workpiece resting on the sawhorses. To cut the arc, I secured my workpiece on the sawhorses so that the 7-ft. arc was in the right location, and I made several passes.

Lance D. Shields, Layton, Utah

Fine Woodworking Magazine, February 2002 No. 154

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