Originally Posted by jondrums
as a person who has worked in a machine shop, I'll chip in with these comments:
1) you'd have to take apart the wheel down to the hub for this - I seriously doubt anyone would do this with the spokes and rim attached
2) its actually not -that- easy to put those fine pitch left hand threads on there
3) by the time you've paid the machinist $60 for the job you shoulda just bought a track hub from ebay
4) nice hubs probably have rolled threads which are quite a bit stronger than cut threads and you'd be hard pressed to find a machinist with the right threadforming tool to make the left hand rolled threads for you.
I say, nice idea but save your money and time
Ditto from someone else with machine shop experience. As jondrums pointed out, any shop that might have that kind of threadforming tool just lying around would most likely charge you more than $60 just to set up.
I also can't see how it could be done on a machine that could keep decent tolerances without the hub being separated from the rim and spokes.
The guy most likely willing to give it a try will be some old timer who chucks your hub into a some gigantic pre-WWII turning center, futzes around for about six Pall Malls, and ruins your hub on the first pass, blaming the material with a shrug. Every town has this guy.
P.S.: Huh-huh. "'Chip' in".