I was trying to cut some 5-40 threads on a rod the other night. The threaded section was about 0.5" long so I really needed to support the part with a live center. However the part diameter was so small I couldn't get a decent center hole. Is there an old machinists trick for doing this, or do I just need to find a smaller center and center drill combo? I tired to cut the threads without support, but there was too much spring. In the end I just ran a die up on the shaft.