Products for USB Sensing and Control
3324_0 - 42STH38 NEMA-17 Bipolar Gearless Stepper
Quantity Price
In Stock
Qty: 136

Product Features

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

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.

When connected to a 1067 - PhidgetStepper Bipolar HC, the 3324 has a maximum speed of 4130 RPM.

Motor Controller and Connection

The 3324 stepper motor connects to a bipolar motor controller such as the 1067 - PhidgetStepper Bipolar HC.

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.

The rear shaft of this motor can be equipped with the HKT22 Optical Encoder for applications where you need to keep track of the exact position, velocity, or acceleration of the motor.

Mounting Bracket

The mounting holes on this motor are compatible with the 3338 - Mounting Bracket (NEMA17).

Product Specifications

Motor Properties

Motor TypeBipolar Stepper
Manufacturer Part Number42STH38-1684B
Step Angle1.8°
Step Accuracy± 5 %
Holding Torque3.6 kg·cm
Rated Torque3.3 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 Voltage12 V DC
Rated Current1.7 A
Coil Resistance1.7 Ω
Phase Inductance3.2 mH

Physical Properties

Shaft Diameter5 mm
Rear Shaft Diameter3.9 mm
Mounting Plate SizeNEMA - 17
Weight289 g
Number of Leads4
Wire Length300 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.