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Stepper Motor NEMA 8, 20x30mm 3.9V 600mA

Stepper Motor NEMA 8, 20x30mm 3.9V 600mA

£20.21 incl VAT
(£16.84 exc. tax)
Price in points: 3368 points
50.00 g.
In stock
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This small hybrid bipolar stepping motor has a 1.8° step angle (200 steps/revolution). Each phase draws 600 mA at 3.9 V, allowing for a holding torque of 180 g-cm (2.5 oz-in). The motor has four color-coded wires terminated with bare leads. Our 4mm universal mounting hub can be used to mount objects on the stepper motor’s 4mm-diameter output shaft.


  • Size: 20 mm square x 30 mm, not including the shaft (NEMA 8)
  • Weight: 60 g (2 oz)
  • Shaft diameter: 4 mm
  • Steps per revolution: 200
  • Current rating: 600 mA per coil
  • Voltage rating: 3.9 V
  • Resistance: 6.5 Ohm per coil
  • Holding torque: 180 g-cm (2.5 oz-in)
  • Inductance: 1.7 mH per coil
  • Lead length: 12 in


The dimension diagram above shows the stepper motor dimensions in mm. The dimension labeled “Length” is 30 mm. The output shaft has a length of 15 mm and a diameter of 4 mm.

Stepper Motor Applications

Stepper motors are generally used in a variety of applications where precise position control is desirable and the cost or complexity of a feedback control system is unwarranted. Here are a few applications where stepper motors are often found:

  • Printers
  • CNC machines
  • 3D printer/prototyping machines
  • Laser cutters
  • Pick and place machines
  • Linear actuators
  • Hard drives

Manufacturer's Details

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Is the "Stepper Motor NEMA 8, 20x30mm 3.9V 600mA" ROHS certified?

Asked by Fatemeh | 30/01/2019, 15:36 | 1 answer(s)

Hi I am building a robot that is required to drive in a relatively large pitch to collect objects and am considering using stepper motors. The only thing I am unsure of is whether a stepper motor would be fast enough. How do I figure out how fast this motor would allow me to go. Thanks

Asked by Tijn | 12/11/2012, 17:08 | 1 answer(s)

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