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Helix Linear Technologies' NEMA 8 Single Stack Captive Lead Screw Stepper Motor Actuators integrate a NEMA 8 single stack bipolar stepper motor with a miniature 0.125 inch diameter lead screw and built-in anti-rotation guide for precise, controlled stroke linear motion in the smallest available footprint. Available with 500 CPR encoder or no-encoder across multiple fine lead options and short stroke lengths for medical devices, optical systems, lab automation, semiconductor, and micro-precision positioning applications. U.S.-made.