NEMA23 PR57HS76-2804-05 18.9kg-cm Stepper Motor-D Type Shaft
NEMA23 PR57HS76-2804-05 18.9kg-cm Stepper Motor-D Type Shaft
NEMA23 PR57HS76-2804-05 18.9kg-cm Stepper Motor-D Type Shaft
The NEMA23 PR57HS76-2804-05 is a high-torque stepper motor with 18.9 kg-cm holding torque, engineered for precision motion control applications requiring robust performance and accurate positioning. Industrial automation engineers, CNC machine builders, and robotics developers rely on this motor for applications demanding consistent torque delivery and repeatable step accuracy across extended operational cycles. This motor solves the critical challenge of achieving precise angular displacement with minimal vibration in systems like automated assembly equipment, 3D printers, laser cutting machines, and multi-axis positioning platforms.
Product Overview
The NEMA23 PR57HS76-2804-05 operates on the electromagnetic stepping principle, where sequential energization of internal coil windings creates a rotating magnetic field that locks the rotor into discrete angular positions. Each pulse to the motor driver advances the shaft by a fixed angle, typically 1.8 degrees per full step, enabling open-loop position control without feedback sensors. The D-type shaft design provides a flat mounting surface for secure coupling to pulleys, gears, and precision lead screws, making it ideal for linear motion conversion in CNC applications and automated machinery.
This NEMA23 variant features a 57mm frame size with extended body length for increased winding capacity, delivering the substantial 18.9 kg-cm torque specification that distinguishes it from lighter NEMA17 motors. The motor utilizes bipolar stepper configuration with dual-phase holding capability, ensuring the rotor remains magnetically locked even during power interruptions, critical for safety-critical applications. Its construction incorporates precision ball bearings and laminated stator cores to minimize cogging torque and vibration, making it suitable for applications requiring smooth operation and minimal mechanical noise.
Key Specifications
| Specification | Details |
| Product Type | NEMA23 Bipolar Stepper Motor |
| Brand | PR Series (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 |
| Frame Size | NEMA23 (57mm x 57mm) |
| Holding Torque | 18.9 kg-cm (1.85 Nm) |
| Shaft Type | D-Type Shaft (6.35mm diameter) |
| Step Angle | 1.8 degrees per full step |
| Winding Type | Bipolar Series Coil |
| Operating Voltage | 24-48 VDC (typical) |
Key Features
- High Holding Torque of 18.9 kg-cm enables driving heavy loads including large diameter lead screws, precision gearboxes, and multi-stage pulley systems without step loss
- D-Type Shaft Design provides positive drive coupling for direct mounting of precision gears, flexible couplings, and encoder wheels with minimal runout
- Bipolar Stepper Configuration with dual-phase holding ensures rotor remains locked in position during power loss, critical for vertical axis applications and safety-critical machinery
- Extended Frame Body Length maximizes winding surface area for superior heat dissipation during continuous operation, enabling sustained torque delivery without thermal derating
- Precision Ball Bearing Construction reduces mechanical friction and cogging torque, delivering smooth motion critical for laser engraving and high-resolution positioning applications
- 1.8 Degree Step Resolution provides 200 steps per revolution for accurate positioning without microstepping, simplifying driver circuit design and reducing control complexity
Applications and Use Cases
- CNC Milling Machines: Drives X, Y, and Z-axis lead screws with precise positioning for tool path accuracy in woodworking and aluminum fabrication equipment
- Industrial 3D Printers: Powers extruder drive mechanisms and build platform positioning with consistent torque for high-resolution part production and multi-material printing
- Laser Cutting Systems: Controls galvanometer mirror positioning and material feed mechanisms for accurate beam deflection and cut edge quality in fabric and acrylic cutting
- Automated Assembly Equipment: Drives rotary indexing tables, pick-and-place mechanisms, and component feeders for high-speed production line automation
- Laboratory Automation: Powers sample positioning stages, automated microscope focus mechanisms, and precision liquid handling systems in pharmaceutical and research applications
- Textile Machinery: Controls fabric feed mechanisms and pattern positioning in embroidery and weaving equipment requiring sustained torque over extended duty cycles
How to Use
Installation begins with mechanical mounting of the motor using the four M5 mounting holes on the NEMA23 face plate, ensuring proper alignment with your driven mechanism using precision shims if necessary. The D-type shaft should be coupled to your load using a flexible coupling or direct gear mesh, taking care to maintain concentricity within 0.1mm to prevent vibration and premature bearing wear. Secure the coupling set screw firmly against the shaft flat, applying approximately 2-3 Nm of torque to prevent slippage during operation.
Electrically, connect the four motor leads to your stepper driver module, typically labeled A+, A-, B+, and B- for the two coil phases. The driver requires a DC power supply rated for 24-48V at minimum 2-3A per phase, with adequate capacitive filtering to suppress voltage spikes during commutation. Configure your motion control system to generate step and direction pulses at frequencies between 100 Hz and 3000 Hz, depending on your load inertia and desired acceleration profile. Always enable the motor hold current during idle periods to maintain positional lock, and implement software acceleration ramping to avoid step loss during rapid direction changes or high-speed operation.
Frequently Asked Questions
What is the maximum speed this NEMA23 motor can achieve?
The NEMA23 PR57HS76-2804-05 can operate up to approximately 3000 full steps per second (540 RPM) without load, though practical speed depends heavily on load inertia and driver current capability. With typical 18.9 kg-cm loads, safe operating speed is 1000-1500 full steps per second. Exceeding these speeds requires microstepping drivers and careful acceleration profiling to prevent step loss. For continuous high-speed operation, thermal management becomes critical as motor temperature rises with speed squared.
Can this motor handle bidirectional rotation and rapid direction reversals?
Yes, the bipolar stepper design enables instantaneous direction reversal by simply reversing the direction control signal to your driver. However, rapid reversals require software-controlled deceleration and acceleration ramping to prevent mechanical shock and step loss. Implement a minimum dwell time of 100-200 milliseconds between direction changes when operating near maximum speed, and use firmware acceleration curves that limit jerk (rate of acceleration change) to protect mechanical couplings and driven mechanisms from stress.
What driver module is compatible with this NEMA23 motor?
The NEMA23 PR57HS76-2804-05 requires a bipolar stepper driver rated for minimum 2-3A per phase at 24-48V supply voltage. Compatible modules include DM542, DM556, CW3660, and similar microstepping drivers available in the market. Ensure your selected driver supports the voltage and current specifications of your power supply, and verify that the step/direction input signals match your motion controller output levels (typically 5V or 3.3V logic). We recommend drivers with current limiting and thermal protection features for reliable long-term operation.
How do I prevent overheating during continuous operation?
The NEMA23 motor can safely dissipate approximately 15-20W of continuous power without exceeding 80 degrees Celsius case temperature. Monitor motor temperature using an infrared thermometer during initial commissioning, and if temperatures exceed 70 degrees Celsius, reduce operational speed or duty cycle. Improve cooling by mounting the motor on aluminum heat sinks, ensuring adequate airflow around the motor body, and reducing driver current to the minimum level required for your load. For applications requiring sustained high-speed operation, consider external cooling fans or liquid cooling systems.
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 Tech Depot
- 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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