|Project by johnhutchinson||posted 12-29-2013 01:06 PM||3211 views||19 times favorited||33 comments|
When I was making my radial wave lamp, I needed to come up with a way to drill accurate holes through wooden balls. So I came up with this “clothespin” solution. I mounted a short board with a slot to a longer board and then drilled a hole with my variable-diameter hole saw. The hole saw’s 3/16” pilot bit gave me the center point in the base board. I then used a regular 3/16” twist bit to position the jig on my drill press table. After clamping the jig to the table, and then pinching the ball in the clothespin, I can use any size bit for a perfectly centered hole.
PS—The table on my little 10” drill press may look a little unusual. It’s an oval Corian sink cutout that I mounted to the steel table with double-face foam tape.
-- John - Central Ohio - "too much is never enough"