On Thu, 6 Jan 2005 23:38:11 -0000, "Dave Baker"
wrote:


Turn a sharp point on a bit of thin bar in the lathe and use that in your
drill chuck to centre on your graph paper. Ideally make it with a collet
chuck or 4 jaw chuck to get it dead concentric. Then use a centre drill to
start the hole before drilling right through.

He does not even have to turn anything. Most taps have conical
points. Just chuck a tap in the drill press and use that point as a
centerfider, then replace it with theintended drill bit.