Im sure its capable of turning the screws, I am also sure that it wouldnt be fun and you would need some decent carbide. If you ran it at about 400rpm and a little coolant from time to time and turned right next to the chuck, you might be able to get through them, I have personally never turned rolled ballscrews or drill rod on my lathe, but I have done some stainless and regular cold roll steel, If you do it right next to the chuck(seems dangerously close) and low rpm and light cuts you can probably do it.
One thing that I wish I could do is knurl stuff, so far I havent been able to, Its probably a user error but the lathe doesnt seem to be ridgid enough for what I have.
Jon |