Definitions for "Ball Screw"
A linear motion bearing where the inner race is helical. Ball screw assembly consists of a screw with a precision ground or rolled helical groove, a nut with an internal groove, and a circuit of precision steel.
an improvement over an acme screw just as an antifriction ball bearing is an improvement over a plain bushing
a precision threaded rod that the machine operator uses either to position a part for machining, or to position the cutting tool, when the part itself is stationary