Products for USB Sensing and Control
Products for USB Sensing and Control


Unit 1 - 6115 4 St SE
Calgary AB  T2H 2H9
+1 403 282-7335

50g-cm Unipolar Stepper

ID: 3316_0
End of Life: This product is sourced from another supplier and will not be ordered again. You can contact for information on the supplier.

This high speed unipolar stepper has an 18° step angle and 30 g·cm of torque at low speeds.


Quantity Available: 96

Qty Price
5 $2.40
10 $2.30
25 $2.25
50 $2.20
100 $2.15

This motor is good for turning small knobs or buttons.


This motor must be controlled by a constant current or chopper drive controller. You can find a list of suitable controllers on the Connection & Compatibility tab.

Motor Controllers

This motor must be controlled by a stepper motor controller. The following table shows how to connect the motor wires to the board connectors to produce a clockwise rotation in the stepper motor when increasing position.

To connect the motor to a bipolar motor controller, leave out the orange and brown wires.

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

Function 33151062STC1001
+ Orange + N.C.
A Red A A
B Yellow B
C Black C B
D White D
+ Brown + N.C.
Product Controller Properties Board Properties
Image Part Number Price Number of Motor Ports Motor Type Controlled By
1062_1B $50.00 4 Unipolar Stepper USB (Mini-USB)
1067_0B $90.00 1 Bipolar Stepper USB (Mini-USB)
STC1002_0 $80.00 1 Bipolar Stepper VINT
STC1003_0 $40.00 1 Bipolar Stepper VINT

Product Specifications

Motor Properties
Motor Type Unipolar Stepper
Manufacturer Part Number PM20L-20-14
Step Angle 18°
Step Accuracy 7 %
Holding Torque 50 g·cm
Rated Torque 30 g·cm
Maximum Speed at Rated Voltage 575 RPM
Electrical Properties
Rated Voltage 12 V DC
Rated Current 80 mA
Coil Resistance 135 Ω
Phase Inductance 32 mH
Physical Properties
Shaft Diameter 1.5 mm
Weight 24 g
Number of Leads 6
Wire Length 300 mm


Here's a list of our unipolar stepper motors:

Product Motor Properties Electrical Properties
Image Part Number Price Motor Type Step Angle Rated Torque Maximum Speed at Rated Voltage Rated Voltage
3314_0 $3.00 Unipolar Stepper 7 12° 710 g·cm 240 RPM 12 V DC
3316_0 $2.50 Unipolar Stepper 18° 30 g·cm 575 RPM 12 V DC