CNC Aluminum Cribbage Board

thingiverse

Here's a CNC-machined crib board design that I made several years back. Finished length is 13.25", width is 4", height is 0.625". I made mine out of a 14" x 4" x 0.75" chunk of 6061-T6 aluminum bar stock, machining was done top-down in a single setup. List of machine tools you'll need: Suitable end mill to square off the ends and set the overall 13.25" length. Face mill / fly cutter to level and clean up the top surface. 3/8" (or smaller) flat nose end mill to cut around the raised track. 1/8" drill for the holes. 45 degree chamfer bit to finish the holes** 1/32" end mill for the track slots and skunk marker. 3/8" diameter ball end mill for the inverse fillet around edge of board*** ** Optional but recommended. The STL file doesn't have the countersinking in it so you'll have to add it yourself using your CAM software. Use a 1/64", 45 degree chamfer on the hole edges. *** Or do lots of passes with a flat end mill, bull nose end mill or whatever you've got. If you're using CAM software and operating a CNC machining center, you know what you're doing :) For pegs, I'm using Lee Valley part numbers 41K05.01 (brass) 41K05.02 (black) and 41K05.03 (nickel). I highly recommend using metal pegs, because extracting broken wooden or plastic pegs out of the board is guaranteed to be a bitch. Peg diameter should be 1/4" (the hole spacing used on this board) or less. You'll also want a half dozen adhesive rubber feet to stick to the bottom surface of the board when it's done, to keep it in place and keep it from marking up whatever you lay it on. I'm using Lee Valley part # 00S20.08.