What is the Lead and Linear Travel Per Step of Linear Stepper Motors?
Linear stepper motors are offered with a variety of lead screws, which are designated by their leaders. The lead is the distance the nut travels when the lead screw turns one revolution. When using a linear stepper motor, larger leads will enable the nut to move more quickly, but with less force. 
To determine the linear travel per step divide the screw lead by the motor steps/revolution. For example, Lead designation E062 has a lead of 1.588 mm (.0625"). With a 1.8-degree step motor, the movement per step is 1.5875 / 200 = 0.00794 mm/step (.062 / 200 = 0.0003125 inch/step). Note: the E in the E062 designation indicates this is based on inches, and the mm values have been rounded.
To determine the linear travel per step divide the screw lead by the motor steps/revolution. For example, Lead designation E062 has a lead of 1.588 mm (.0625"). With a 1.8-degree step motor, the movement per step is 1.5875 / 200 = 0.00794 mm/step (.062 / 200 = 0.0003125 inch/step). Note: the E in the E062 designation indicates this is based on inches, and the mm values have been rounded.