NEMA 17 Stepper Motor 17HS4401S 1.7A 43N.cm – 1.8° Bipolar Stepper Motor for 3D Printer & CNC

The NEMA 17 17HS4401S is a 2-phase hybrid bipolar stepper motor intended for controlled rotational movement. Each full step corresponds to 1.8°, giving 200 full steps per revolution. A compatible driver can further divide these steps using microstepping for smoother operation.

Its 1.7A-per-phase rating and approximately 43N.cm holding torque make it suitable for many desktop motion-control applications. The 42mm square mounting frame follows the common NEMA 17 form factor, making it useful with many 3D-printer and CNC mechanical assemblies.

Features

• NEMA 17 bipolar stepper motor.
• 2-phase, 4-wire configuration.
• 1.8° step angle.
• 200 full steps per revolution.
• Approximately 43N.cm holding torque.
• 1.7A rated phase current.
• 42 × 42mm standard frame size.
• 40mm motor body length.
• 5mm shaft diameter.
• Suitable for microstepping with compatible drivers.
• Good starting, stopping, and reversing response.
• Suitable for open-loop position control.
• Compact design for robotics and motion-control systems.

Applications

• 3D printers.
• CNC routers and engraving machines.
• Desktop CNC mills.
• XYZ plotters.
• Linear motion systems.
• Arduino and microcontroller-based robotics.
• Camera sliders and pan/tilt mechanisms.
• Automated positioning systems.
• Pick-and-place mechanisms.
• Laboratory and educational motion-control projects.
• DIY automation equipment.

How It Works

A stepper motor driver energizes the two motor phases in a controlled sequence. Each input step pulse commands the motor to advance by a defined angular increment. With a 1.8° step angle, 200 full-step commands produce approximately one complete revolution.

The motor's rotational speed is controlled by the frequency of the step pulses. Direction is controlled by the driver's direction signal. Microstepping can be used to subdivide each full step and produce smoother motion.

How to Use

1. Identify the two motor coils using the motor's wiring information or a multimeter.
2. Connect the two coil pairs to a compatible bipolar stepper driver.
3. Set the driver's current limit appropriately for the motor.
4. Connect the driver to the microcontroller or motion controller.
5. Provide a suitable DC supply to the driver.
6. Send step and direction signals from the controller.
7. Start at a moderate stepping speed and increase gradually as required.
8. Secure the motor firmly to the mechanical frame to minimize vibration and resonance.

Important Notes

• Do not connect the motor directly to a DC power supply. Use a suitable constant-current/chopper stepper driver.
• The 2.6V phase voltage does not mean the motor should simply be operated from a 2.6V power supply. Stepper drivers normally regulate coil current and may use a substantially higher motor-supply voltage.
• Set the driver's current limit according to the motor's 1.7A/phase rating.
• The motor can become hot during normal operation, particularly when operated near its rated current.
• Prolonged stall or excessive current can cause overheating and possible motor damage.
• Stepper motors can lose steps if acceleration, load, or speed exceeds the motor/driver system's capability.
• Mechanical mounting affects vibration and resonance.
• Extremely high speeds may significantly reduce available torque.
• The stated dimensions and weight may have minor measurement variations.
• Cable length and connector style may vary between compatible 17HS4401S batches.

Package Includes

• 1 × NEMA 17 17HS4401S 4.2kg-cm / 43N.cm Stepper Motor