Nema 14 Micro Stepper Motor, 12V, 4 Phase, Bipolar. $57.37. SKU: ATO-MGSTEP-14124. Good price 4 phase micro stepper motor for sale, size in Nema 14 (Ф35mm). Rated voltage 12V, current 0.6A, resistance 20Ω, high torque 60 mN-m, stepping angle 7.5 degree. Miniature bipolar stepper motor with metal gear, cheap and wide applications.