Today I was drilling side holes in a short piece of 1-1/4" pipe. Holes were
5/8" directly into the side of the pipe, hole perpendicular to the pipe axis. Rather than lay out the holes by hand and centerpunch them I stuck the pipe in the mill vise, picked up the end, and offset to the first hole. I opened the drill chuck all the way up - mine's a Jacobs 6A, I think - and my Starrett automatic center punch just did fit into the chuck opening, very little wiggle indeed. Put it in solidly, pulled down on the handle and it centerpopped, swapped in the 1/8" drill and it picked up the centerpop. Not perfect every time but very close, certainly close enough. Easy and quick.
Grant