I am so delighted and impressed with Jon Dale's invention that I had to show you some more pictures of it.
Here you see the circle cutter attached to the Stew-Mac router guide which adjusts up and down with those bronze thumb screws. The Dremel tool threads firmly into the guide. Each hole in Jon's invention is exactly a 32nd of an inch farther from the cutter than the preceeding hole, thus it cuts a diameter circle 1 16th larger or smaller when you move the pivot pin one hole.
Here you see the 3/16th inch pivot pin in hole number 13. Each hole is numbered so it is easy to keep track of what you are doing. If you keep notes on what holes you are using, and need to make a cut deeper, you simply go back tothat hole and you are exactly on target.
I mounted the pivot pin inside a thin brass tube with an inside diameter of just 3/16ths.
I glued the tube into this flat work board that I use for many purposes.
I glued the tube into this flat work board that I use for many purposes.
Jon includes this handy guide showing diameter sizes for each numbered hole. If you want a 2.5 inch diameter sound hole in your tenor ukulele you set #7 hole over the pivot pin and that is all there is to it.
If I have convinced you that you must have one for your workshop, here is Jon's contact informaton. Sorry about the sideways picture- Just turn your computer on its side.
Oh!, I almost forgot the big decision of the day. How to cut this beautiful piece of Cocobolo for a back on #95. There were numerous options including a skunk stripe. This is what I finally settled on. What a piece of wood, What a tough decision. It is going to be fun to French Polish this beauty.
