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

NEMA-23 Bipolar 76mm Stepper

ID: 3307_0

This powerful bipolar stepper has a 1.8° step angle and 11.06 kg·cm of torque at low speeds.


Replaced by the 3331_0, a motor with similar specifications.

At 12.5 Kg-cm of holding torque, this is a powerful gearless stepper motor.

Product Specifications

Motor Properties
Motor Type Bipolar Stepper
Manufacturer Part Number 57BYG621
Step Angle 1.8°
Step Accuracy 5 %
Holding Torque 12.5 kg·cm
Rated Torque 11.1 kg·cm
Maximum Speed (w/1063 Motor Controller) 600 RPM
Maximum Motor Speed 4688 RPM
Acceleration at Max Speed
(w/1067 Motor Controller)
180000 1/16 steps/sec²
Electrical Properties
Recommended Voltage 24 V DC
Rated Current 2.2 A
Coil Resistance 1.8 Ω
Phase Inductance 6 mH
Physical Properties
Shaft Diameter 14
Mounting Plate Size NEMA - 23
Weight 916 g
Number of Leads 4
Wire Length 300 mm
Customs Information
Canadian HS Export Code 8501.31.00
American HTS Import Code 8501.31.20.00
Country of Origin CN (China)

The 3307 stepper motor connects to a bipolar motor controller such as the 1067 - PhidgetStepper Bipolar HC.

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.

The mounting holes on this motor are compatible with the 3339 - Mounting Bracket (NEMA23).