Ed, if you're thinking of buying "just" 1" x 10TPI acme threaded rod you may want to re-think. You mentioned the existing screws weren't worn but the nut(s) are, indicating the screws were made of some higher (harder) class steel.
Just a thought.
Steve
Just a thought.
Steve
Busy Bee 12-36 lathe, Busy Bee Mill drill, Busy Bee 4x6 bandsaw, Homemade 9x17 bandsaw, Ad infinitum.