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  • Nema 17, 42 BYG shaft-reversed stepper motor
    • i i
    • images/l/Geeetech_42FZDJ_1.jpg images/l/Geeetech_42FZDJ_1.jpg
    • images/l/Geeetech_42FZDJ_2.jpg images/l/Geeetech_42FZDJ_2.jpg
    • images/l/Geeetech_42FZDJ_3.jpg images/l/Geeetech_42FZDJ_3.jpg
    • images/l/Geeetech_42FZDJ_4.jpg images/l/Geeetech_42FZDJ_4.jpg
Nema 17, 42 BYG shaft-reversed stepper motor


Shipping Weight:370g

Quantity in stock:999943


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This is a shaft- reversed stepper motor that is frequently used in CNC machines and 3D printers.
The Advantages of step motors are low cost, high reliability, high torque at low speeds and a simple, rugged construction that operates in almost any environment. They are typically digitally controlled as part of an open loop system for use in holding or positioning applications.
This is a Nema 17 stepper motor with a 1.7 x 1.7 inch (43.2 x 43.2 mm) faceplate. The Nema 17 is larger and generally heavier than for example a Nema 14, but this also means it has more room to put a higher torque. However, its size is not an indication of its power.


2 Phases
Step Angle: 1.8±5% degree/phase
Voltage: 4.2V DC
Current: 1.2A/phase
Resistance: 8.8±10% Ω/phase
Inductance: 6.0mH±20 %( 1kHz 1V rms)
Lead style: AWG26 UL1007
Comes with 70cm 4-Lead Wire
Holding torque: 40N.cm Min
Detent torque: 2.6N.cm Max
insulation resistance:100MΩ Min (DC 500V)
Insulation class: B (130°C)
Rotor torque: 57g.cm 2  
Weight: 280g

For the using way you can refer this wiki.

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  • Danny Smith | 11/05/2020

    Hi would this work for A20 printer axis

    • Jocelin Jia | 11/05/2020

      hello,it is better to use the same motor as your printer have .

  • Jörg Grimus | 01/09/2019

    hi I want to replace my extruder stepper to a stronger motor SKU:700-001-0284? i have the 42shd0227-24B from A30 Printer. The electrical connection is made by an adapter from me but the current/ Voltage if the question of the function?

    • Jocelin Jia | 01/09/2019

      sorry, it can not use on the extruder, thanks

  • Lebon Frederic | 06/26/2016

    How many step/mm for these motor? I cant set up my e3d titan extruder.

    • William Kwok | 06/26/2016

      Hi,Lebon.The subdivision of the motor is 1/16 step.

    • William Kwok | 06/26/2016

      In most cases these figure should be calculated by yourself, you can refer to:http://prusaprinters.org/calculator/#steppers