Ball screw 1,High precision and efficiency, 2,High speed,low noise 3,High rigidity structure 4. ... loop,like Turn-1,Row=1.5,2.5 etc,so Turn x Row1.5x1,2.5x2 etc. Characteristics:1.Drving torque ... is 1/3 of slide screw;2.High precision,Low noise;3.Ensure that accurate in micro ... to answer your question.Used machine and our factory 1/2 Inch Right hand ball screw by Rongter