Choose the technique that works best for the project at hand. This simple router trammel is easy to build and allows you to cut a perfect circle. For circles up to 6 ft. across, use a piece of 1/4-in. plywood, MDF or hardboard that’s about 4 ft. long and at least as wide as your router base. Start by removing the base plate from your router and clamping it to one end of the trammel material. If you want your trammel to be stylish, trace around a coffee cup to make a nice-looking rounded end. Then draw tangent lines connecting the circles and cut the sides. If you don’t care about looks, simply make a long rectangular trammel.
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