no encoder

Helix Linear Technologies' BSA-8-E Single Stack Flanged Ball Screw Stepper Motor Actuators without encoder integrate a NEMA 8 single stack bipolar stepper motor with precision 4 mm and 5 mm diameter ball screws and a flanged ball nut for accurate open-loop linear motion in an ultra-miniature, low-profile footprint. Available in 1, 2, and 3 mm lead options with optional 8N end machining for miniature robotics, medical devices, optical systems, semiconductor, and micro-precision automation applications where open-loop position control is sufficient. U.S.-made.