42STH38 NEMA-17 Bipolar 48mm Stepper SKU: 33600

42STH38 NEMA-17 Bipolar 48mm Stepper

$19.95 USD

This motor is a larger NEMA-17 motor that produces 3600g-cm of holding torque.

In stock

$19.95 USD
SKU: 33600 Categories: , , Tag:


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). The flip side is that they are power-pigs, but ya gotta love this sort of pig!

Sourced by Phidgets, this larger 3324 NEMA-17 stepper motor produces a 3600g*cm (49.99in*oz) of holding torque. To control this type of motor you’ll need a circuit that has 4 or more MOSFETs, a Dual H-bridge, or a specifically designed Stepper driver.

If you’re connecting it to a 1063 – PhidgetStepper Bipolar 1-Motor or similar controller, use this table to connect the motor wires to the board connectors to get clockwise rotation. To wire for counter-clockwise rotation, swap the Red and Blue wires. Please note: Connecting the motor directly to a power supply will destroy the motor and void the warranty. If you want to check your motor make sure it is connected to a constant current/chopper drive controller.

Wiring Guide

  • Board Connector A is Black
  • Board Connector B is Green
  • Board Connector C is Red
  • Board Connector D is Blue

Note: This is not the internal wiring of the stepper which is usually has A & C and B & D labels tied together, but to be clear the Black & Green wires are connected to one coil in the motor and Red and Blue the other. Datasheet available under documentation tab.


  • NEMA-17 Bipolar 4-wire
  • Step Angle: 1.8°
  • Step Accuracy: +/-5%
  • Holding Torque: 360000g-cm / 49.99 oz-in
  • Maximum Motor Speed: 1000 RPM
  • Recommended Voltage: 24 VDC
  • Coil Resistance: 1.7 Ohms
  • Rated Current: 1.7 A
  • Phase Inductance: 3.2mH
  • Mounting Plate Size: NEMA-17
  • Shaft Diameter: 5mm
  • Rear Shaft Diameter: 3.9mm
  • Shaft Length: 24mm
  • Rear Shaft Length: 12mm
  • Weight: 289g
  • Number of Leads: 4
  • Lead Length: 300mm

Note: Make sure to unplug the power cord from your driving circuit before switching wires around.


More Info

Weight 0.335 kg
Dimensions 8 × 5 × 5 cm




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