Products for USB Sensing and Control
3330_0 - 57STH56 NEMA 23 Bipolar Precision Gearless Stepper
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In Stock
Qty: 452

Product Features

This precision bipolar stepper with rear shaft has a 0.9° step angle and 11.2 kg·cm of torque at low speeds.
Product Description

This NEMA-23 motor generates 12 kg-cm of holding torque at 2.8 Amps. It comes with the rear shaft exposed, so you can mount an encoder or shaft coupler.

This motor is particulary suited for precision applications due to its 0.9° step angle.

When connected to a 1067 - PhidgetStepper Bipolar HC, the 3330 has a maximum speed of approximately 2250 RPM.

Motor Controller and Connection

The 3330 stepper motor connects to a bipolar motor controller such as the 1067 - PhidgetStepper Bipolar HC.

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 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.

Mounting Bracket

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

Product Specifications

Motor Properties

Motor TypeBipolar Stepper
Manufacturer Part Number57STH56-2804MB
Step Angle0.9°
Step Accuracy± 5 %
Holding Torque12 kg·cm
Rated Torque11.2 kg·cm
Maximum Speed (w/1067 Motor Controller)2250 RPM
Acceleration at Max Speed
(w/1067 Motor Controller)
800000 1/16 steps/sec²

Electrical Properties

Recommended Voltage12 V DC
Rated Current2.8 A
Coil Resistance900 mΩ
Phase Inductance4.5 mH

Physical Properties

Shaft Diameter14
Rear Shaft Diameter3.9 mm
Mounting Plate SizeNEMA - 23
Weight695 g
Number of Leads4
Wire Length300 mm


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.