#thingsimbadat

I needed a 2-3/4" hole, but I only had a 2-1/2 hole saw. I forget where I saw this trick, but you can use a washer as a guide to trace a perfectly parallel line (works great for router templates with brass guides too!) I'm really bad with math and geometry (tough disability for a woodworker) so I'm in the process of making a 3" circle in this picture, but you get the idea. For reference, this is a 1/4" washer giving me a parallel line 1/4" away from the original. I went back, erased it and used a # 8 washer to get a 1/8" line. Because now I know that 2-1/2" + 1-1/8" + 1-1/8" = 2-3/4". #woodworker #woodworking #tip #thejawnshop #jig #router #washer #math #geometry #arithmetic #thingsimbadat #oops

Basically..