This model is dual shaft Nema 17 Bipolar stepper motor,it with step angle 0.9deg and size 42x42x48mm. It has 4 wires, each phase draws 1.68A at 2.8V, with holding torque 44Ncm (62.48oz.in).
This model is economy linear stepper which named Nema 17 Non-captive linear actuator, it was composed of 48mm 1.8 degree 0.4A Nema 17 stepper motor and 300mm length Tr8x8 linear screw.
This model is economy linear stepper motor which named Nema 17 external linear actuator, the motor part is 48mm 1.8 degree 1.68A Nema 17 stepper motor. It was integrated with 330mm Tr8x2 threaded rod and a POM screw nut move along..