57HM76-2804 NEMA 23 18Kg-cm Stepper Motor Round-Type
57HM76-2804 NEMA 23 18Kg-cm Stepper Motor Round-Type
57HM76-2804 NEMA 23 18Kg-cm Stepper Motor Round-Type
The 57HM76-2804 is a NEMA 23 stepper motor with 18 kilogram-centimeter holding torque, designed for precision motion control applications requiring moderate to high torque output. Professional engineers and automation specialists use this round-type stepper motor in CNC machines, 3D printers, robotic arms, and industrial automation systems where accurate angular positioning and repeatable motion are critical. This motor solves the challenge of achieving precise, cost-effective motion control without the complexity and expense of servo systems, making it ideal for applications demanding step-and-repeat accuracy over extended operational periods.
Product Overview
The 57HM76-2804 NEMA 23 stepper motor operates on the principle of electromagnetic coil activation to rotate a permanent magnet rotor in discrete angular increments. When sequential pulses are applied to the motor windings through a stepper driver, the rotor advances one step at a time, providing inherent position feedback without requiring external encoders. The round-type design features a compact cylindrical housing that integrates seamlessly into space-constrained applications while maintaining the structural rigidity necessary for sustained torque delivery. With an 18 kilogram-centimeter holding torque rating, this motor can maintain load position without continuous power, making it energy-efficient for applications requiring frequent start-stop cycles.
The NEMA 23 form factor represents a standardized 2.3-inch square mounting face, ensuring compatibility with universal mounting brackets, couplings, and mechanical assemblies across the industry. This stepper motor's round-type construction provides superior heat dissipation compared to flat designs, enabling continuous operation under moderate load conditions. The motor features multiple winding configurations supporting various voltage and current requirements, allowing integration with standard stepper drivers operating at 12V, 24V, or higher supply voltages. Its precision construction ensures minimal cogging torque and smooth stepping action, critical for applications like laser engraving, automated positioning tables, and medical device actuation systems.
Key Specifications
| Specification | Details |
| Product Type | NEMA 23 Round-Type Stepper Motor |
| Model Number | 57HM76-2804 |
| Motor Size | NEMA 23 (57mm x 57mm mounting face) |
| Holding Torque | 18 kilogram-centimeter (1.76 Newton-meters) |
| Motor Type | Permanent Magnet Stepper |
| Step Angle | 1.8 degrees per full step (200 steps per revolution) |
| Winding Configuration | Bipolar parallel or series (dual-phase) |
| Rated Voltage | 12V to 24V DC nominal (driver dependent) |
| Rated Current | 2.8 Amperes per phase (typical) |
| Resistance | Approximately 0.5 to 1.0 ohms per phase |
| Inductance | Approximately 2.5 to 5.0 millihenries per phase |
| Rotor Inertia | Low inertia design for rapid acceleration |
| Shaft Type | 6.35mm diameter keyed shaft with flat |
| Connector Type | 4-pin or 6-pin terminal block configuration |
| Operating Temperature | 0 degrees Celsius to 50 degrees Celsius ambient |
| Storage Temperature | Minus 20 degrees Celsius to 70 degrees Celsius |
| Brand | Original Authentic |
| 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 |
Key Features
- 18 kilogram-centimeter holding torque provides reliable load retention and positioning accuracy for medium-duty industrial applications without external braking mechanisms
- NEMA 23 standardized mounting ensures universal compatibility with industrial-grade couplings, pulleys, lead screws, and mechanical transmission systems
- Round-type cylindrical housing design optimizes thermal dissipation and allows 360-degree mounting flexibility compared to flat motor designs
- 1.8-degree step angle delivers 200 full steps per revolution, enabling fine positional control and smooth motion profiles in precision automation
- Bipolar winding configuration supports advanced microstepping techniques through compatible stepper drivers, achieving up to 1600 microsteps per revolution for ultra-smooth operation
- Low rotor inertia design enables rapid acceleration and deceleration, critical for high-speed positioning and repetitive motion applications
- 6.35mm keyed shaft with flat surface accommodates standard motor couplings and mechanical power transmission components
- Compact form factor integrates into space-constrained assemblies while maintaining structural rigidity for sustained torque delivery
Applications and Use Cases
- CNC milling machines and engraving systems requiring precise XY axis positioning with 18 kilogram-centimeter torque for medium-load spindle control and axis movement
- 3D printer Z-axis and extruder drive systems where reliable step accuracy ensures consistent layer height and filament feed consistency without slipping
- Automated laboratory equipment including sample positioning stages, liquid handling systems, and analytical instrument turntables requiring repeatable micro-positioning
- Industrial automation conveyors and indexing tables for product positioning, sorting, and assembly line motion control in manufacturing environments
- Robotic arm joint actuation for collaborative robots and pick-and-place systems requiring moderate torque with precise angular positioning feedback
- Laser engraving and cutting systems using stepper motors for XY galvanometer mirror positioning and material feed control
- Medical device actuation including infusion pump drives, diagnostic equipment positioning stages, and surgical instrument automation
- Telescope and optical instrument positioning systems requiring smooth tracking motion and repeatable focus adjustment without external feedback sensors
How to Use
To integrate the 57HM76-2804 stepper motor into your application, first identify the winding configuration and voltage rating of your specific unit, then select a compatible stepper driver rated for at least 2.8 amperes per phase at your supply voltage. Mount the motor using the standardized NEMA 23 mounting bracket aligned with your mechanical load, ensuring proper coupling to your driven component through a flexible coupler to accommodate minor misalignment. Connect the four or six motor windings to the stepper driver output terminals following the manufacturer's wiring diagram, verifying correct phase sequencing to ensure proper rotational direction and smooth stepping action.
Configure your stepper driver with appropriate step pulse frequency, direction control signals, and microstepping settings based on your application requirements. For smooth operation, begin with full-step mode to verify motor direction and mechanical function, then gradually increase microstepping resolution if smoother motion is required. Implement acceleration and deceleration ramps in your control software to prevent step loss during rapid speed changes, and monitor motor temperature during extended operation to ensure it remains within the 0 to 50 degrees Celsius ambient operating range. For applications exceeding the 18 kilogram-centimeter holding torque specification, consider adding mechanical brakes or using multiple motors in parallel configuration.
Frequently Asked Questions
What is the difference between holding torque and running torque in the 57HM76-2804?
Holding torque of 18 kilogram-centimeter represents the maximum load the motor can maintain stationary when energized with rated current, preventing load drift when power is applied. Running torque, typically 60 to 70 percent of holding torque, is the available torque during actual rotation and decreases further at higher stepping frequencies. This distinction is critical when selecting stepper motors for applications requiring both load retention and dynamic motion, as you must verify running torque meets your acceleration and speed requirements.
Can the 57HM76-2804 operate with microstepping drivers?
Yes, the 57HM76-2804 is fully compatible with microstepping stepper drivers that divide each full step into multiple substeps, typically 2, 4, 8, or 16 microsteps per full step. Microstepping significantly reduces vibration and noise while providing smoother motion profiles, making it ideal for precision applications like 3D printing and laser engraving. However, microstepping reduces available torque proportionally, so verify your driver's current rating matches the motor's 2.8-ampere specification and that your application load remains within reduced running torque limits.
What stepper driver voltage and current specifications should I use with this motor?
The 57HM76-2804 operates optimally with stepper drivers rated for 12V to 24V DC supply voltage and minimum 2.8 amperes per phase continuous current rating. Higher voltage drivers provide better high-speed performance by reducing inductance effects, while 24V systems are recommended for applications exceeding 1000 steps per second. Always verify your driver's current capacity matches or exceeds the motor's rated current, as undersized drivers will cause reduced torque and potential step loss under load.
How do I prevent step loss and ensure reliable positioning?
Step loss occurs when motor torque cannot overcome load inertia or friction at high stepping frequencies. Prevent this by implementing smooth acceleration ramps, reducing stepping speed during high-load periods, verifying adequate driver current supply, and ensuring proper mechanical coupling without excessive backlash. Monitor motor temperature as overheating reduces available torque, and consider adding external load-holding mechanisms like mechanical brakes or lead screw anti-backlash nuts for critical applications requiring absolute position retention.
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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