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3324_0 42STH38 NEMA-17 Bipolar Gearless Stepper

Product Code: 3324
Excl. VAT: £14.58 Incl. VAT: £17.50
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This NEMA-17 motor generates 3.6 Kg-cm of holding torque at 1.7 Amps. It comes with the rear shaft exposed, so you can mount an encoder or shaft coupler.

This affordable bipolar stepper with a rear shaft has a 1.8° step angle and 3.3 kg·cm of torque at low speeds.

The following diagram shows how to connect the motor wires to the board connectors to produce a clockwise rotation in the stepper motor when increasing position. To wire for counter-clockwise rotation when increasing position, reverse the red and blue wires.

Note: Make sure to unplug the power cord from the motor controller before switching wires around.

Motor Properties

Motor Type Bipolar Stepper
Manufacturer Part Number 42STH38-1684B
Step Angle 1.8°
Step Accuracy ± 5 %
Holding Torque 3.6 kg·cm
Rated Torque 3.3 kg·cm
Maximum Speed (w/1067 Motor Controller) 4130 RPM
Acceleration at Max Speed
(w/1067 Motor Controller)
1E+06 1/16 steps/sec²


Electrical Properties

Recommended Voltage 12 V DC
Rated Current 1.7 A
Coil Resistance 1.7 Ω
Phase Inductance 3.2 mH


Physical Properties

Shaft Diameter 5 mm
Rear Shaft Diameter 3.9 mm
Mounting Plate Size NEMA - 17
Weight 289 g
Number of Leads 4
Wire Length 300 mm

Warning !  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.

FeeFo Reviews

Date / Score
Customer Comment Our Response
07-May-2015 Product:
no problems
Read more reviews on Feefo
Feefo reviews 100% 1

Whenever possible, items which are in stock are dispatched the same day, or the next working day.

Large and/or heavy items are dispatched by UPS courier service and these orders must be placed before 15:00hrs (GMT) to ensure same day dispatch.

Small items are normally sent using a Royal Mail service for UK orders, and International Airmail or UPS for overseas orders

Returns Policy

3324_0 42STH38 NEMA-17 Bipolar Gearless Stepper