You could resize the tube with a sizing die. This can be done in an arbor
press, but you may need to make several dies to reduce the diameter that
much. The die would be a hardened ring in a tube that you force down over
your tubing. The max squeeze per iteration would be about .020" The ring
should be kept as thin as possible in cross section to reduce friction. The
lube of choice would be lanolin. Pushing the ring onto the tube is easy, but
lifting the ring off the tube requires the tube and ring be held very
securely. Be sure to leave enough space in the die to allow the tube to grow
in length and it will do so substantially.
Steve

wrote in message
...
I have to replicate some brass tubes that are used in a carburetor.
The tubes are .093 OD, and .015 wall. The original tubes are 2" long,
with the end .250 reduced down to .067 OD, which has an ID drilled and
sized to .030. I know that I could solder and drill the .093 tubing
and make it work, but I need to make this just like the OE tubing, so
I need to know if this is something I can do in my lathe? I need to
do about 25 of them for the first run.

If anyone can shed some light on this procedure, or has any positive
and helpful comments, please share!