Double Sided Center Hole Punch
Most of us have seen a center hole punch.
We line it up in the cross hairs of lines we've drawn on wood, and either hammer a tiny hole at this point with the punch, or have a spring loaded punch do it for us.
Anyway---has anyone seen one (a punch) that's double sided, that insures the center holes in each side of wood are immediately above and below each other?
Here's where I am going with this.
Image a piece of wood, small, suspended in mid aid. This feat's done with steel threaded rod that goes through the wood at several points, where nuts are positioned at just the right height along each rod that they support the wood in question from below, level.
That of course keeps the wood from falling, but not fixed in position, gravity nothwithstanding. Turn the piece upsidedown, watch it slide down the rod. So another nut is tightened down on top side of the wood along the threaded steel rod. Now the wood in question can neither rise or lower.
Finally, we don't want the nuts coming up higher or lower than the top of bottom surface side of the wood.
So, on a 3/4" thick piece of wood we're suspending in mid-air, we Fostner bit drill a 1/4" deep hole on each side of the wood with, say, a 3/4" bit to recess the nuts (and washers) on each side of the wood--immediately in line with each other vertically....and we do this in several places on the wood. This would be facilitated with the punch I seek.
The middle 1/4" in the wood being suspended and drilled has a 3/8" hole clear through, thru which the rod goes.
A double sided center hole punch might allow me to perfectly align the holes above and below the suspended wood. Sure...I could measure on each side, but I manage to get off by a 1/32" by the time I am done.