Price: $34.76

     Stepper motors are different from DC motors in that they have to be pulsed to move in set increments. That means you can't simply hook them up to a power supply to make them go, but they have other advantages, like accurate positioning (1 pulse=1 increment of movement), and lots of low-speed torque (ability to twist things).
     This 4-wire bipolar stepper has 1.8? per step for smooth motion and a nice holding torque. This NEMA-17 stepper motor produces a whopping 4000g*cm of holding torque at minimum. Compares to the NEMA-17 Bipolar 48mm Stepper Motor, this item has a shorter length and Lower rated voltage and current.

    NEMA-17 Bipolar 40mm Stepper Motor

Pin Out

  • Green wire =A
  • Gay wire = B
  • Yellow Wire = C
  • Red wire = D


  • High Torque
  • NEMA-17 Bipolar 4-wire
  • Step angle: 1.8 degree
  • Holding Torque: 4000g-cm@1.2 Amps


  • Number of steps: 200 Step
  • Angle: 1.8 degrees
  • Rated Voltage: 2V
  • Phase Resistance: 1.7 ohm
  • Rated Current : 1.2 A
  • Phase Inductance : 4.5 mH
  • Holding torque: 0.4 N.M
  • Number of Leads: 4
  • Dimensions axis: ?4.5 x 20 mm
  • Dimensions: 42 x 42 x 40 mm
  • Weight: 250 g