28BYJ-48-64 64:1 Stepper Gearmotor

USD $4.49

Originally designed for control of HVAC vanes and similar low-demand equipment, these stepper-motor gearboxes have lots of hacking potential. This is the higher-torque / lower speed 64:1 version.

In stock

SKU: 22310 Categories: , , Tag:


We had some of these drop on our desk a while back with a "You gotta find more of these!" message taped to it. What it turned out to be is a pretty cool, inexpensive geared stepper motor, ideal for a bunch of low-torque applications.

This 28BYJ-48 is a 5V unipolar geared stepper motor, manufactured by the boatload for the HVAC control industry, where you'll find these little units as actuators for airflow control in ducts and vanes. It features a 5mm "Double-D" shaft, mounting lugs, and a nice 5-conductor 0.1" pitch connector. The gearing isn't the beefiest or most precise we've ever seen, but it's adequate for reasonable loads.

Being a stepper motor, you'll need a motor driver circuit. There are many ways to drive a stepper, but this ULN2003 driver board is specifically designed to drive these 5V stepper gear motors.


  • 64:1 (63.68395:1) gearing
  • Solarbotics Tested
  • Torque @5V:
    • FULL Step mode: 821gmf*cm (11.4in*oz) @ 200mA draw
    • HALF Step mode: 598gmf*cm (8.3in*oz) @ 256mA draw
  • 2038 steps per revolution
  • 4-phase unipolar stepper wiring through 23cm (9") long cable to 5-pin connector (0.1" pitch)
  • 5V nominal voltage
  • ~35 ohms coil resistance
  • Basic dimension:
    • 28mm diameter
    • 20mm tall (excluding shaft)
    • 5mm dia. "double-D" shaft, 9mm long
  • 37g

Thanks to Graham Wideman for his additional in-depth analysis of these gear motors.


Additional information

Weight 0.0333 kg
Dimensions 5 × 4.5 × 3 cm




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Warning: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
Please visit www.P65Warnings.ca.gov for more information. This item was manufactured prior to August 31, 2018.

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