Description:
This NEMA-11 motor has an integrated Planetary gearbox with a 26103/121 :1 (27:1) ratio. It comes with the rear shaft exposed, so you can mount an encoder or shaft coupler.

When connected to a 1067 - PhidgetStepper Bipolar HC, the 3321 has a maximum speed of 120 RPM. At the output of the gearbox, the step angle approximately 0.067°. When using the step angle in calculations, you should derive the exact step angle by dividing 1.8° by the gearbox reduction ratio. At low speeds this motor produces 14 kg·cm of torque.
 

Specifications:

Motor Properties

Electrical Properties

Physical Properties

Gearbox Properties

Resources:

• Stepper Motor and Controller Primer
• Mechanical Drawings

The 3321 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.

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

The rear shaft of this motor can be equipped with the HKT22 Optical Encoder for applications where you need to keep track of the exact position, velocity, or acceleration of the motor.