Drill the hole all the way through the V block and put in a pin that
fits nicely. Best way for less complex tooling, but you might need more
than one drill block for more holes. You don't really want to move the pin
hole to hole as you go because the index might move. Gotta keep the same
reference.
You could also just use any block that has the same height to the tube,
not necessarily a V block.

"Miki" wrote in message
oups.com...
| I tried searching, but couldn't seem to come up with the correct search
| term. I'm quite sure this has been discussed though.
|
| If you have a tube with a hole drilled in it radially, and want to
| drill more holes exactly in-line with the existing hole, how would you
| do this on a drill press? Finding the center of the tube is the easy
| part, but how do you know you have the tube "clocked" correctly on the
| V-block?
|