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Unit 1 - 6115 4 St SE
Calgary AB  T2H 2H9


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

50g-cm Unipolar Stepper

ID: 3316_0

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


Quantity Available: 40

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

This 50g-cm unipolar stepper motor is good for light jobs such as turning small knobs.


  • 50 g-cm torque rating
  • 18 degree step angle
  • Rated for 80mA of current
  • Connects to a Phidgets stepper controller


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
Part Number Price Number of Motor Ports Motor Type Controlled By
4A Stepper Phidget
$40.00 1 Bipolar Stepper VINT
8A Stepper Phidget
$80.00 1 Bipolar Stepper VINT
PhidgetStepper Bipolar HC
$90.00 1 Bipolar Stepper USB (Mini-USB)

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
Rated Speed 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
Customs Information
Canadian HS Export Code 8501.10.00
American HTS Import Code 8501.10.40.40
Country of Origin CN (China)