7ncm7NCM Datasheet. Part #: VI-J7NCM. Datasheet: 33Kb2P. Manufacturer: Vicor Corporation. Description: DCThis mini nema 11 bipolar stepper motor with step angle 1.8deg, short shaft 9.5mm and size 28x28x33mm. It has 4 wires and holding torque 7Ncm(9.91oz.in).