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Stepper Motor: Bipolar, 200 Steps/Rev, 20×42mm, 4.3V, 0.8 A/Phase

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This small NEMA 8-size hybrid bipolar stepping motor has a 1.8° step angle (200 steps/revolution). Each phase draws 800 mA at 4.3 V, allowing for a holding torque of 300 g-cm (4.2 oz-in). With a weight of 80 g, this is one of the smaller stepper motors we carry.


  • Size: 20 mm square × 42 mm, not including the shaft (NEMA 8)
  • Weight: 80 g (2.8 oz)
  • Shaft diameter: 4 mm “D”
  • Steps per revolution: 200
  • Current rating: 800 mA per coil
  • Voltage rating: 4.3 V
  • Resistance: 5.4 Ω per coil
  • Holding torque: 300 g-cm (4.2 oz-in)
  • Inductance: 1.5 mH per coil
  • Lead length: 30 cm (12″)
  • Output shaft supported by two ball bearings

More specifications are available in the datasheet (28k pdf).