machining ballscrews

Howdy
I recently acquired a nice mill[Kasuga] and am wondering if anyone
has tried this:
Use a small lathe mounted on the mill table [maybe just the
headstock] to hold and slowly turn the screw while grinding the end
with apropriate cup wheel mounted in the mill spindle. I can run my
spindle up to 10k rpm with inverter for short periods.
I don't own a lathe and machinists that I have do end-machining
always remark/complain about the hardness of screw .
I was thinking up alternatives.

Carl