Is 0.005-0.010” of backlash with an Acme Screw acceptable?
I’m rebuild an old mill and while inspecting the leadscrew I noticed that over almost the entire length of the screw the unit had about 0.005-0.010” of backlash. However the ends of the screw I was getting closer to 0.002”, so this must have been the part of the screw that was rarely used it looks like. I might have taken down these numbers incorrectly because when the nut was not bolted down when I was inspecting it so it was free to move side to side.
I’m going to pricing out new parts on Monday, I just wanted to know if these tolerances were acceptable or not.