JK57HS51-2804 NEMA23 10.1 kg-cm Stepper Motor – Round Type Shaft

The JK57HS51-2804 is a NEMA23 stepper motor engineered for precision motion control applications requiring moderate torque output of 10.1 kg-cm at holding position. This motor is widely used by automation engineers, CNC machine builders, and robotics developers who need reliable stepping performance with minimal vibration and excellent positional accuracy. It solves critical challenges in applications demanding synchronized multi-axis movement, such as 3D printing, laser engraving, industrial automation, and laboratory instrumentation where stepper motor reliability directly impacts production quality.

Product Overview

The JK57HS51-2804 NEMA23 stepper motor operates on the principle of electromagnetic coil energization in a sequenced pattern, creating rotational torque through interaction with permanent magnets embedded in the rotor. When current pulses are applied to the motor windings via a stepper driver, the magnetic field rotates in discrete steps, advancing the rotor by a fixed angle per pulse. The round type shaft design provides superior mechanical stability and reduced runout compared to flat-faced alternatives, making it ideal for direct coupling to precision mechanical assemblies. This motor features a 1.9-degree step angle per pulse, delivering 200 steps per complete revolution, which enables fine positional control without requiring external gearing in many applications.

The NEMA23 frame size represents the industry standard 57mm x 57mm mounting footprint, ensuring compatibility with existing automation frameworks and mechanical assemblies. The 10.1 kg-cm holding torque specification indicates the motor's ability to maintain position against external mechanical loads without continuous power consumption, a critical advantage in power-sensitive applications. The round shaft configuration allows direct mounting of pulleys, gears, or coupling mechanisms without shaft adapters, reducing assembly complexity and improving mechanical efficiency. This particular model combines robust construction with cost-effectiveness, making it the preferred choice for engineers balancing performance requirements with budget constraints in mid-range automation projects.

Key Specifications

Specification	Details
Product Type	NEMA23 Stepper Motor with Round Type Shaft
Model Number	JK57HS51-2804
Frame Size	NEMA23 (57mm x 57mm)
Holding Torque	10.1 kg-cm (approximately 0.99 Nm)
Step Angle	1.9 degrees per step
Steps per Revolution	200 steps
Shaft Type	Round Type Shaft
Shaft Diameter	8mm
Rated Voltage	12V DC typical
Phase Configuration	4-Phase Bipolar
Winding Resistance	Approximately 4.7 ohms per phase
Operating Current	2.8A per phase maximum
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

• 10.1 kg-cm Holding Torque delivers reliable positioning force for mid-range automation applications including conveyor systems, robotic arms, and precision positioning stages
• 1.9-degree step angle with 200 steps per revolution enables smooth motion profiles and fine positional accuracy without external reduction gearing in most applications
• Round Type Shaft design minimizes shaft runout and provides superior mechanical stability for direct coupling to precision mechanical components like ball screws and timing pulleys
• 4-Phase Bipolar Configuration with 2.8A rated current ensures compatibility with standard stepper drivers and microcontroller-based motion control systems
• Compact NEMA23 Frame mounting footprint maintains compatibility with existing industrial automation racks and multi-axis motion control platforms
• Low Step Angle Resonance characteristics reduce vibration in continuous operation, critical for applications requiring smooth motion like laser cutting and 3D printing

Applications and Use Cases

• 3D Printer and Additive Manufacturing Systems: Provides precise X, Y, and Z-axis movement control with holding torque sufficient for direct drive extruder applications and heated bed positioning
• CNC Engraving and Laser Cutting Machines: Delivers accurate positioning for gantry systems and rotary tables, enabling detailed artwork reproduction with sub-millimeter repeatability
• Automated Laboratory Equipment: Powers sample carousel indexing, pipette positioning, and micro-fluidic valve actuation in medical diagnostic and pharmaceutical research instruments
• Industrial Conveyor and Material Handling Systems: Controls synchronized multi-motor conveyor belt speed regulation and directional sorting mechanisms with load capacities up to 50kg per axis
• Robotics and Automation Control: Enables joint actuation in collaborative robots and industrial automation arms requiring moderate torque with precise angular positioning
• Precision Positioning Stages: Drives linear actuators and rotary tables in optical alignment systems, metrology equipment, and semiconductor inspection machinery

How to Use

To integrate the JK57HS51-2804 stepper motor into your automation project, first identify your motion control platform and select an appropriate stepper driver capable of delivering 2.8A per phase at your desired operating voltage, typically 12V or 24V. Mount the motor to your mechanical assembly using the standard NEMA23 four-bolt pattern, ensuring the round shaft is properly aligned with your coupling mechanism or load. Connect the motor windings to the stepper driver following the color-coded wire convention: typically red and black for one phase, green and blue for the opposite phase, with proper polarity critical for correct rotational direction.

Configure your microcontroller or motion control software to generate step and direction pulses at your desired frequency, remembering that each pulse advances the motor by 1.9 degrees. Start with conservative current settings around 2.0A per phase and gradually increase to 2.8A while monitoring motor temperature and vibration characteristics. For applications requiring smooth acceleration profiles, implement ramping algorithms that gradually increase step frequency from 100 Hz to your target frequency, typically 1000-5000 Hz depending on load inertia. Always include mechanical load testing before deploying the motor in production systems, verifying that holding torque remains adequate under worst-case load conditions and that step accuracy meets your application requirements.

Frequently Asked Questions

What is the difference between holding torque and running torque in the JK57HS51-2804?

Holding torque of 10.1 kg-cm represents the maximum external force the motor can resist when stationary with full phase current applied, critical for preventing load drift in vertical applications. Running torque, typically 60-70 percent of holding torque, is the actual torque available during rotation and decreases as stepping frequency increases due to inductance effects. For this model, expect approximately 6-7 kg-cm running torque at 1000 Hz stepping frequency, declining further at higher speeds. Always design your mechanical system accounting for running torque rather than holding torque to avoid stalling and missed steps.

Can the JK57HS51-2804 operate at 24V instead of 12V?

Yes, the JK57HS51-2804 can operate at 24V with proper stepper driver configuration, though this requires a 24V-compatible driver capable of limiting current to 2.8A maximum. Operating at higher voltage increases stepping frequency capability and reduces heating, allowing faster acceleration profiles. However, higher voltage increases electromagnetic noise and may require additional filtering in sensitive applications. Verify your stepper driver specifications support 24V operation before upgrading voltage, as improper driver selection can damage motor windings through excessive current.

How many stepper motors can be controlled simultaneously with a single microcontroller?

A single microcontroller can theoretically control unlimited stepper motors by multiplexing control signals, though practical limits depend on your controller's GPIO pin availability and processing speed. For example, an Arduino Uno with 14 digital pins can directly control 7 stepper motors using one pin per direction signal and one pin per step signal. For multi-axis systems requiring synchronized motion, consider using dedicated motion control boards like CNC shield or industrial PLC systems that handle timing and acceleration profiles in hardware, freeing your microcontroller for higher-level logic.

What stepper driver should I use with the JK57HS51-2804?

Select drivers rated for minimum 3.0A per phase at your operating voltage, such as DM542, TB6600, or industrial-grade Gecko G540 systems. Microstepping drivers offering 2x, 4x, 8x, or 16x resolution provide smoother motion and reduced vibration compared to full-step operation, though they require proportionally higher current capacity. For 24V operation, ensure your driver includes current limiting and thermal shutdown protection to prevent damage during stalled conditions or thermal runaway scenarios.

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.

Why Buy from The Engineer Store

• Genuine Products: Sourced directly from authorized distributors with authentication
• Expert Team: Our technical team validates every product before listing
• Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
• Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
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• Technical Support: 24/7 expert guidance via email and WhatsApp
• Returns: 7-day return policy on manufacturing defects only

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