I need some calculation help to see if what I would like to do will work.
I am looking at this stepper motor.
Stepper Motor
Max RPM on motor is 1,000 RPM

Now if I have it geared to 3-1 between motor and screw drive and the screw drive is 5 turns per inch, Will this raise and lower a unit that weighs 1,000 pounds if ran at 25% of max speed.

Thanks
Milton