3322_0 28STH32 NEMA 11 Bipolar Stepper with 100:1

£52.70 £43.92

This NEMA-11 motor has a Planetary gearbox with a 991044/2057 :1 ratio.. It comes with the rear shaft exposed, so you can mount an encoder or shaft coupler.

  • 0.018° Step Angle
  • 32 kg·cm of torque at low speeds

When connected to a 1067 - PhidgetStepper Bipolar HC the 3322 has a maximum speed 35 RPM. At the output of the gearbox, the step angle is approximately 0.018°. When using the step angle in calculations, you should derive the exact step angle by dividing 1.8° by the gearbox reduction ratio.

At 0.67 Amps, this stepper motor can produce a maximum torque of 60 kg-cm. However, the gearbox is only rated for 32 kg-cm of continuous torque. Loading this gearbox stepper beyond the torque rating of the gearbox will shorten its useful life.

The following diagram 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.

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

The mounting holes on this motor are compatible with the 3337 - Mounting Bracket (NEMA11).

Motor Properties

Motor TypeBipolar Stepper
Manufacturer Part Number28STH32-0674B / 28JXS40K100
Step Angle0.018°
Step Accuracy± 5 %
Holding Torque32 kg·cm
Rated Torque32 kg·cm
Maximum Speed (w/1067 Motor Controller)35 RPM
Acceleration at Max Speed
(w/1067 Motor Controller)
1.5E+06 1/16 steps/sec²

Electrical Properties

Recommended Voltage12 V DC
Rated Current670 mA
Coil Resistance5.6 Ω
Phase Inductance3.4 mH

Physical Properties

Shaft Diameter6 mm
Rear Shaft Diameter3.9 mm
Mounting Plate SizeNEMA - 11
Weight243.6 g
Number of Leads4
Wire Length300 mm

Gearbox Properties

Gearbox TypePlanetary
Gear Ratio99 10442057 : 1
Backlash Error1 12°
Maximum Strength of Gears32 kg·cm
Shaft Maximum Axial Load25 N
Shaft Maximum Radial Load35 N


warningConnecting 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.