A screw has 30 threads per inch. How far does it advance into a material when turned 3 full rotations?

SCREW PITCH: 30 threads per inch means each full rotation advances the screw 1/30 inch. 3 rotations × (1/30 inch per rotation) = 3/30 = 0.10 inches. The screw is a simple machine (inclined plane wrapped around a cylinder) that converts rotational force (torque) into linear force and motion. MORE THREADS PER INCH = finer pitch = more mechanical advantage per turn = less advance per turn. FEWER THREADS PER INCH = coarser pitch = less mechanical advantage = more advance per turn.