NEMA23 PR57HS76-2804 18.9kg-cm Stepper Motor-Round Type Shaft
NEMA23 PR57HS76-2804 18.9kg-cm Stepper Motor-Round Type Shaft
NEMA23 PR57HS76-2804 18.9kg-cm Stepper Motor-Round Type Shaft
The NEMA23 PR57HS76-2804 is a high-torque stepper motor with 18.9 kg-cm holding torque, designed for precision automation and motion control applications requiring robust performance and accurate positioning. Professional engineers and automation specialists use this motor in CNC machines, 3D printers, laser cutting systems, and industrial robotics where reliable step-by-step motion control is critical. This stepper motor solves the challenge of achieving accurate angular displacement without feedback sensors, making it ideal for open-loop positioning systems that demand consistency and repeatability.
Product Overview
The NEMA23 PR57HS76-2804 stepper motor operates on the principle of electromagnetic coil activation to create precise rotational steps. When electrical pulses are applied to the motor windings in a specific sequence, the magnetic field aligns the rotor teeth with the stator poles, producing discrete angular movements. Each pulse advances the shaft by a fixed angle, typically 1.8 degrees per step in full-step mode, allowing for exact positioning without requiring position feedback. The round-type shaft design provides superior mechanical stability and load distribution compared to flat-shaft variants, making it suitable for direct coupling to precision mechanical systems and load-bearing applications.
This NEMA23 model stands out with its exceptional 18.9 kg-cm holding torque, which represents the maximum rotational force the motor can maintain when energized without losing step position. The robust construction features high-quality laminated stator cores and precision-wound coils that minimize vibration and heat generation during continuous operation. The round shaft design facilitates easier integration with standard couplings, pulleys, and gearboxes, while the NEMA23 frame size balances power delivery with compact dimensions suitable for space-constrained automation projects. The PR57HS76-2804 specification indicates this is a bipolar stepper motor with optimized winding configuration for enhanced torque characteristics across variable speed ranges.
Key Specifications
| Specification | Details |
| Product Type | NEMA23 Bipolar Stepper Motor with Round Type Shaft |
| Brand | Premium Quality Industrial Grade |
| Origin | Original/Authentic |
| Warranty | 7 days on manufacturing defects |
| Shipping | 1-5 days from Bengaluru |
| Delivery | 7-8 days across India |
| Support | 24/7 via Email and WhatsApp |
| Holding Torque | 18.9 kg-cm at rated current |
| Frame Size | NEMA23 (57mm x 57mm mounting face) |
| Shaft Type | Round type, 6.35mm diameter |
| Step Angle | 1.8 degrees per step (200 steps per revolution) |
| Winding Configuration | Bipolar series wound coils |
| Operating Voltage | 24-48V DC recommended with stepper driver |
Key Features
- High Holding Torque of 18.9 kg-cm ensures stable positioning under load without step loss or drift during powered operation
- Round Type Shaft Design provides superior mechanical strength and compatibility with standard industrial couplings and mechanical transmission systems
- Precise 1.8 Degree Step Angle delivers 200 steps per full revolution, enabling micro-positioning accuracy for CNC and precision automation applications
- Bipolar Winding Configuration allows flexible control with standard stepper drivers and microcontroller interfaces for simplified circuit integration
- Compact NEMA23 Frame maintains space efficiency while delivering industrial-grade torque suitable for production-level equipment
- Low Vibration Construction with optimized stator-rotor design reduces mechanical noise and extends bearing life in continuous operation
Applications and Use Cases
- CNC Milling and Routing Systems where the motor drives X, Y, Z axis movement with precise positioning accuracy for cutting tool control and workpiece manipulation
- 3D Printer Extruder and Bed Movement providing reliable filament extrusion control and build platform positioning for consistent layer deposition in FDM printing
- Laser Cutting and Engraving Equipment controlling galvanometer mirrors or mechanical scanning systems for accurate beam positioning and pattern generation
- Industrial Automation and Conveyor Systems driving load transfer mechanisms, sorting systems, and robotic arm joints requiring repeatable angular positioning
- Surveillance and Tracking Systems operating pan-tilt camera mounts with smooth, controlled motion for video monitoring and automated surveillance applications
- Laboratory Instrumentation including automated sample handlers, microscope stages, and optical alignment systems requiring micron-level positioning precision
How to Use
To operate the NEMA23 PR57HS76-2804 stepper motor, connect the four motor coil wires to a compatible stepper motor driver module such as A4988, DRV8825, or TB6600. The driver requires a microcontroller input signal (typically Arduino, PLC, or industrial controller) to generate the precise pulse sequences that energize the motor coils in the correct sequence. Supply power to the driver at 24-48V DC depending on your driver specifications and desired torque characteristics. The motor shaft can be directly coupled to mechanical loads using standard 6.35mm shaft couplings, pulleys, or gearboxes for speed reduction if lower speed with higher torque is required.
Configure your microcontroller code to generate step pulses at the desired frequency to achieve your target speed, typically ranging from 100 Hz to 5000 Hz depending on load and acceleration requirements. Use the direction control pin on your stepper driver to reverse motor rotation when needed. Ensure proper cooling by allowing adequate airflow around the motor housing during extended operation, as continuous high-current operation generates heat. For maximum holding torque and positioning accuracy, keep the motor energized when holding position, though this increases power consumption. Implement acceleration and deceleration ramps in your control code to prevent step loss at high speeds and reduce mechanical shock on connected equipment.
Frequently Asked Questions
What is the difference between holding torque and running torque in this stepper motor?
Holding torque (18.9 kg-cm for this model) is the maximum rotational force the motor can exert when stationary and energized, preventing unwanted shaft rotation under external load. Running torque is lower and decreases as motor speed increases due to back-EMF effects. At low speeds (below 500 RPM), running torque approaches holding torque, but at higher speeds it diminishes significantly. For your application, verify that the required load torque stays below the holding torque specification for reliable positioning.
Can I operate this NEMA23 motor directly from an Arduino without a stepper driver?
No, you cannot connect this motor directly to Arduino pins. The motor requires significantly more current (typically 2-3 amps per coil) than Arduino pins can safely supply (maximum 40mA). You must use an intermediate stepper motor driver module like A4988, DRV8825, or TB6600 between your Arduino and the motor. The driver amplifies the low-current logic signals from Arduino to high-current motor control signals. This also protects your Arduino from motor back-EMF voltage spikes that could damage microcontroller pins.
How do I determine the correct voltage for driving this stepper motor?
The NEMA23 PR57HS76-2804 can operate between 24-48V DC depending on your stepper driver and desired performance. Higher voltage (48V) provides faster acceleration and higher maximum speed, while lower voltage (24V) reduces power consumption and heat generation. Check your specific stepper driver's voltage rating and use a power supply within that range. Most industrial applications use 24V for safety compliance, while high-speed applications prefer 48V. Always use a regulated power supply with adequate current capacity (minimum 3-4 amps per phase for this motor).
What is the maximum speed this motor can achieve?
The maximum speed depends on your stepper driver voltage, load inertia, and acceleration profile. Typically, the NEMA23 can reach 1000-2000 RPM under light loads with 48V supply and proper acceleration ramps. However, torque decreases significantly at high speeds due to back-EMF effects. For precise positioning applications, operating speeds are usually 100-500 RPM to maintain adequate torque. Always implement acceleration ramps to avoid step loss when reaching maximum speed, as sudden speed changes can cause the motor to lose synchronization with the control signal.
When will I receive my order?
Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.
What is your return and warranty policy?
We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.
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- Technical Support: 24/7 expert guidance via email and WhatsApp
- Returns: 7-day return policy on manufacturing defects only
Buy NEMA23 PR57HS76-2804 18.9kg-cm Stepper Motor-Round Type Shaft Online in India
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