Hey Oldboy,
I replied but got a network error.
I didn't think my setup could turn those threads on aluminum yet alone steel.
Maybe with a much bigger motor (1000 oz/in +) and a larger pulley ratio 4:1, perhaps.
Tapers are no problem and flutes should be possible if there's enough X travel.
Got me thinking about the threads.Hmmm.
Maybe I could use bit in the spindle for Thread Milling, then rotate the head 90 degrees.
Use that to cut the threads along the X axis, should be able to cut anything that way.
Now I have another project to try out.
Hoss
P.S. Got about 150 holes tapped tonight, got it down to 25 seconds per hole.
A lot faster than doing it by hand.
http://www.hossmachine.com