Replacing motor, coupler, lead screw, and nut, 28000 Series double stack external linear actuator delivers thrusts up to 30 lb and resolutions from 0.000125–0.002 in. per step. Rotating acme stainless steel lead screw is incorporated into motor’s rotor. As motor steps, lead screw rotates but does not advance, making unit suitable for obtaining linear travel in confined spaces. Typical applications include medical equipment, X-Y Tables, automation of any kind, and valve control.