• Soyo stepper motor - NEMA 17, 42² mm

This NEMA 17 size stepper motor manufactured by SOYO has a 1.8° step angle (200 steps/revolution). Frame size of this NEMA 17 is 42 mm x 42 mm while frame length vary according to selected option as well as holding torque (from 3.2 kg-cm at 4V@1200mA for 48 mm length up to 3.7 kg-cm for 38 mm length).

Options (Frame Length)

Please select one of the three possible frame length. Option is not available when stepper motor is not in stock.

Option: frame length
Holding Torque
38 mm
3.7 kg-cm
2.8 V
1680 mA
48 mm
3.2 kg-cm
4 V
1200 mA

This motor is equipped with a 5 mm D-shape shaft (flattened by 0.5 mm) that you can use to safely tight a 5 mm bore size pulley or hub. Please notice that our 5 mm GT2 pulley must be slightly adjusted with a file to fit on this shaft. Shaft length is 24 mm.


  • type: NEMA 17 bipolar
  • model: SOYO SY42STHx
  • steps/revolutions: 200
  • shaft diameter: 5 mm “D”
  • step angle: 1.8°
  • lead size: 30 cm
  • number of leads: 4 (26 AWG)
  • mounting holes: 4x M3 screw holes with 26 mm spacing

The motor has four color-coded wires terminated with bare leads: black and green connect to one coil; red and blue connect to the other. It can be controlled by a pair of suitable H-bridges (one for each coil), but we recommend using a bipolar stepper motor driver.

Part List

  • 1x stepper motor



Dimensions L x W x H 42.3 mm x 42 mm x (38 - 48) mm
Weight 285 g to 350 g

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Soyo stepper motor - NEMA 17, 42² mm

  • Soyo
  • This Soyo NEMA 17 is a bipolar stepper motor with a step resolution of 1.8° angle (200 steps/revolution). Frame size is 42mm x 42 mm for a length between 38 mm and 48 mm according to option. Holding torque vary from 3.7 kg-cm to 3.2 kg-cm.
  • --
  • Availability: 19 (Canada)
  • $ US16.95 $ US9.00
  • USD 250.00 Left For Free Shipping

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Tags: soyo, stepper motor, stepper motor nema 17, shaft 5 mm