"Arch" wrote in message
...
Is there a way to drill dovetails in both sides (bottom and top) of a
bowl blank with a Forstner bit _before mounting the blank on the lathe_
so that the piece will be in line (centered) after reverse chucking)?
Lasers? Vodoo? Luck?


Jig, as Leo detailed. Dowel piece of the proper diameter, drill down into
the sacrificial base, then down into the piece without moving the base.
Insert dowel, invert work and bore. Errors possible from raising the head
of the drillpress after boring the reference hole. It might wander a bit
from center.

Have to ask, if the purpose is to mount the piece on the lathe, what do you
hope to gain by doing an operation on the DP rather than the lathe, which is
so easy? What kind of weird thing are you making?