I'm in the middle of moving my office and have a lot to do for the sled show this week but once it's over I could take some measurements and draw the bolt pattern with dimensions on autocad for your machinist. Kev
Thanks to both of you. I really don't need a cad drawing just the spacing of the bolt holes. I already have the drawing of the wheel itself. I was going to try and make it smaller but the width of each tooth has to be about 3/8 of an inch in order for it to excite any magnetic field to make AC signals. I have several home cooked designs to try once I get the center cut out and holes drilled to mount on the pinion yoke. The one on the JTR site is cut in half so the pinion yoke doesn't have to be removed to mount it. I'm going to try that too since I don't want to play around with the yoke on mine.