●The high accuracy screw lead measuring machine series (single, accumulative, segmental zed) that utilizes a laser interformer. ●Two machine sizes are available and have the measuring length of 1500mm and 3000mm ●It can measure screw lead high accurately without the influence of inaccuracies caused by screw run-out or sagging by screw weight. ●It can be measured not only the lead on a screw itself but also with nut assembly too as option.