This powerful bipolar stepper with a rear shaft and a planetary gearbox has a 0.023° step angle and 240 kg·cm of torque at low speeds.

This NEMA-23 motor has an integrated Planetary gearbox with a 
76 ⁴⁹/₆₄ :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 3334 has a maximum speed of 25 RPM. At the output of the gearbox, the step angle approximately 0.023°. When using the step angle in calculations, you should derive the exact step angle by dividing 1.8° by the gearbox reduction ratio.

At 2.8 Amps, this stepper motor can produce a maximum torque of 960 kg-cm. However, the gearbox is only rated for 240 kg-cm of continuous torque. Loading this gearbox stepper beyond the torque rating of the gearbox will shorten its useful life.

The 3334 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.

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

Product Specifications

Motor Properties

Motor Type	Bipolar Stepper
Manufacturer Part Number	57STH56-2804B / 56JXS300K77
Step Angle	0.023°
Step Accuracy	± 5 %
Holding Torque	240 kg·cm
Rated Torque	240 kg·cm
Maximum Speed (w/1067 Motor Controller)	25 RPM
Acceleration at Max Speed  (w/1067 Motor Controller)	1E+06 1/16 steps/sec²

Electrical Properties

Recommended Voltage	12 V DC
Rated Current	2.8 A
Coil Resistance	900 m?
Phase Inductance	2.5 mH

Physical Properties

Shaft Diameter	12 mm
Rear Shaft Diameter	3.9 mm
Mounting Plate Size	NEMA - 23
Weight	1.5 kg
Number of Leads	4
Wire Length	300 mm

Gearbox Properties

Gearbox Type	Planetary
Gear Ratio	76 49?64 : 1
Backlash Error	1 1?2°
Maximum Strength of Gears	240 kg·cm
Shaft Maximum Axial Load	100 N
Shaft Maximum Radial Load	250 N

Resources

• Stepper Motor and Controller Primer
• Mechanical Drawings

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.