When you work in areas where 0.000100"s of inches makes a difference, the use of precision ground ball screws is pretty much mandatory - a lead screw simply isn't in the same league
(PS there's already been a long exchange on cut vs ground lead screws vs ball screws - this shouldn't be an excuse to resurrect that thread)
When you're shooting BB's at a light bulb at a distance of 2 miles, the utmost in accuracy is essential if you want to hit the target.
If you'r using hand grenades, you can be within several yards and still accomplish your goals.
If you're using thermo nuclear weapons, +/- a mile is close enough.
How close does it (the ball screw) have to be to suit YOUR needs??? ONce you answer that question, you can choose between a rolled or ground or DIY version.... |