A hole in one blank, that is. I bored a 3/8" hole through a blank over 1' long. I came in from both ends and there is no perceptible lip where the holes meet! But it seems like I am using too many steps, so I thought I would post and get some feedback.
I got a hollow center with a removable dead center. I put a rounded spindle beween the spur center and the hollow center and crank it tight enough that it wears in a ring for the hollow center (the dead center doesn't stick out far) and I turn a 1" tenon at the hollow center end. Then I reverse it and chuck the tenon and make another tenon and ring indentation on the other end. I leave it chucked, and take the dead center out of the hollow center and snug it up on the hollow center. Then I passed a 1/4" bit through the hollow center and bored a lead hole in a few inches. Then I backed my talistock way back and swapped out the hollow center for a Jacobs, chucked the 3/8" bit and slowly bored the hole from that end. then I reversed it and repeated the procedure with the hollow center to start a lead hole and the Jacobs to drill the main hole, which met perfectly. So now I have a blank with a centered hole with a concentric ring indentation for the hollow center and a concentric tenon. I am happy with that, but it seemed like I went to too much trouble to get there.
I got a hollow center with a removable dead center. I put a rounded spindle beween the spur center and the hollow center and crank it tight enough that it wears in a ring for the hollow center (the dead center doesn't stick out far) and I turn a 1" tenon at the hollow center end. Then I reverse it and chuck the tenon and make another tenon and ring indentation on the other end. I leave it chucked, and take the dead center out of the hollow center and snug it up on the hollow center. Then I passed a 1/4" bit through the hollow center and bored a lead hole in a few inches. Then I backed my talistock way back and swapped out the hollow center for a Jacobs, chucked the 3/8" bit and slowly bored the hole from that end. then I reversed it and repeated the procedure with the hollow center to start a lead hole and the Jacobs to drill the main hole, which met perfectly. So now I have a blank with a centered hole with a concentric ring indentation for the hollow center and a concentric tenon. I am happy with that, but it seemed like I went to too much trouble to get there.