Products for USB Sensing and Control Canada flag
Products for USB Sensing and Control

sales inquiries

quotes, distributor information, purchase orders

technical inquiries

support, advice, warranty, returns, misshipment

website inquiries

corrections or suggestions


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

42BYGHW811-AG26.8 NEMA-17 Bipolar 26.8:1 Planetary Gearbox Stepper

ID: 3312_0

This powerful bipolar stepper has a 0.067° step angle and 40 kg·cm of torque at low speeds.


Replaced by the 3318 – 42BYGH40(M)-160-4A NEMA 17 Bipolar 26:1 Planetary Gearbox Stepper

This NEMA-17 motor has an integrated Planetary gearbox with a 26.8:1 ratio. At 2.5 Amps (maximum current), this gearbox stepper can produce a maximum torque of 128 kg-cm. The gearbox is only rated for 40 kg-cm of continuous torque, and 80 kg-cm for brief overloads. Loading this gearbox stepper beyond the torque rating of the gearbox will shorten its useful life.

Product Specifications

Motor Properties
Motor Type Bipolar Stepper
Manufacturer Part Number 42BYGHW811-AG26.8
Step Angle 0.067°
Step Accuracy 5 %
Holding Torque 40 kg·cm
Rated Torque 40 kg·cm
Maximum Speed (w/1063 Motor Controller) 23 RPM
Electrical Properties
Recommended Voltage 12 V DC
Rated Current 2.5 A
Coil Resistance 1.3 Ω
Phase Inductance 1.8 mH
Physical Properties
Shaft Diameter 8 mm
Mounting Plate Size NEMA - 17
Weight 562 g
Number of Leads 4
Wire Length 300 mm
Gearbox Properties
Gearbox Type Planetary
Gear Ratio 26 103121 : 1
Customs Information
Canadian HS Export Code 8501.10.00
American HTS Import Code 8501.10.40.60
Country of Origin CN (China)

The 3312 stepper motor connects to the 1063 - PhidgetStepper Bipolar 1-Motor.

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 wire for counter-clockwise rotation when increasing position, reverse the red and blue wires.

Wire Color Black Green Red Blue
Board Connector A B C D

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


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.