You can't accurately start a 3/4" bit in a 1/32" center punch
Use a hinge center punch
like the one shown or a Vix bit, a special drill bit that's self centering; see Buyer's Guide.
To use, set the drill point in the center punch
mark, then bring the corner of the hole square up to contact and align the drill bit.
These marks were deepened with a small center punch
After cutting the legs to length, flatten the ends of the legs two inches, center punch
and drill a 7/16 hole in each leg.
4 CONDUCT A CENTER PUNCH
TEST on poured concrete walls and slabs before you shoot power fasteners.
If the dovetail blocks are loose use a center punch
to peen the dovetail on the receiver to tighten.
The transfer punch I used is a perfect slip fit in the base screw hole, so my center punch
mark was right on the money.
Of course, you can make a starter mark in the metal with a center punch
The dimple serves as a substitute for a center punch
mark to prevent wandering when drilling into a curved surface.
Q I always and I really mean always, seem to have a problem getting my center punch
to be located exactly where I want it.
You can give the bit an exact starting point using a center punch
and a hammer.
If you have to be very precise, always use a center punch
before you drill.
the intersect point, giving it a fairly deep dimple so that a drill bit can start cutting without walking off target.
power drill), use a center punch
and hammer to lightly nick (don't pound hard