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Phidgets 3325_0 42STH38 NEMA-17 Bipolar Stepper Motor with 5.18:1 Gearhead

Item number: 22589

EAN: 4251326841853

This bipolar stepper motor with a rear shaft and planetary gear has a step angle of 0.35° and a torque of 18 kg-cm at low speeds.

Category: Motors, Actuators & Servos

79,73 €

including 19% VAT. , plus shipping (DPD)

Available now!

Shipping time: 10 - 11 workdays


Phidgets 3325_0 42STH38 Bipolar Stepper Motor

This NEMA-17 motor has an integrated planetary gear with a ratio of 52/11 :1. The rear shaft is exposed, so you can mount an encoder or shaft coupling.

At the output of the gearbox, the step angle is slightly less than 0.35°. If you use the step angle in calculations, you should derive the exact step angle by dividing 1.8° by the gear reduction ratio.

At 1.7 amps, this stepper motor can produce a maximum torque of 18.6 kg-cm. However, the gearhead is only rated for a continuous torque of 18 kg-cm. If you load this geared stepper motor beyond the rated torque of the gearbox, its useful life will be shortened.


This motor must be controlled by a constant current or chopper drive controller.


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.


Motor Properties

Motor Type

Bipolar Stepper


Step Angle



Step Accuracy

± 5 %


Holding Torque

18 kg·cm


Rated Torque

18 kg·cm


Maximum Motor Speed

200 RPM

Electrical Properties

Recommended Voltage

24 V DC


Rated Current

1.7 A


Coil Resistance

1.7 Ω


Phase Inductance

3.2 mH

Physical Properties

Shaft Diameter

8 mm


Rear Shaft Diameter

3.9 mm


Mounting Plate Size

NEMA - 17



457 g


Number of Leads



Wire Length

300 mm

Gearbox Properties

Gearbox Type



Gear Ratio

5 ⁄11 : 1


Backlash Error

1 1⁄2°


Maximum Strength of Gears

18 kg·cm


Shaft Maximum Axial Load

49.1 N


Shaft Maximum Radial Load

98.1 N

Mechanical Drawing Phidgets 3325_0


Shipping weight: 0,70 Kg
Product weight: 0,50 Kg