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Nema 34 Stepper Motors

Step Motor Nema 34 12 Nm

Name: Step Motor Nema 34 12 Nm
SKU: 86HS120-EN
Price: 57.98 USD
Availability: InStock

Original price was: 110.40$.Current price is: 57.98$.

Step Motor Nema 34 12 Nm – Industrial Automation Parts | Superior Performance Series

This Step Motor Nema 34 12 Nm from Mermak CNC is a powerhouse designed for demanding applications, offering superior torque and precision. As a hybrid stepper motor, it excels in systems requiring high load-carrying capacity and absolute positioning accuracy, where conventional motors fall short. Its advanced coil structure and optimized magnetic circuit design ensure dynamic performance and stability in industrial machinery. Manufactured to NEMA (National Electrical Manufacturers Association) standards, this motor meets the critical requirements of industrial automation.

Availability: 26 in stock

SKU: 86HS120-EN Category: Nema 34 Stepper Motors

🔥 Special for Today Only %47 Discount Opportunity!📦 Category: Nema 34 Stepper Motors🏷️ NEMA Size: Nema 34🏷️ Brake Configuration: Standard🏷️ Shaft Diameter: 14 mm🏷️ Dimensions: 14🏷️ Torque: 12 Nm

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Step Motor Nema 34 12 Nm

INDUSTRIAL AUTOMATION PARTS | Superior Performance Series

Detailed Product Review

The Step Motor Nema 34 12 Nm from Mermak CNC solidifies its leadership in industrial automation solutions. It’s a powerhouse designed for demanding applications, offering superior torque and precision. This hybrid stepper motor is ideal for systems requiring high load-carrying capacity and absolute positioning accuracy, stepping in where conventional motors fall short. Its advanced coil structure and optimized magnetic circuit design ensure dynamic performance and stability in industrial machinery. Manufactured to NEMA (National Electrical Manufacturers Association) standards, this motor is engineered to meet the most critical requirements of industrial automation.

Known in the industry as a “Servo Killer,” this motor boasts an impressive holding torque of 12.0 Nm (Newton-Metres). This value signifies approximately 6 times the torque of a standard Nema 23 motor, and even up to 3 times that of other Nema 34 series motors. Positioned at the highest tier of the Heavy Duty class, this motor can precisely hold tons of load without the need for an external geared brake, thanks to its exceptional low-speed torque performance. This characteristic is indispensable for applications with high inertia and continuous load, such as marble, granite, and steel processing. The motor’s robust body and keyed steel shaft offer unwavering durability even under the harshest industrial conditions.

Key Advantages

Ultra-High Holding Torque (12 Nm): With a true torque value of 12.0 Nm, this motor eliminates the need for geared brakes in heavy-duty industrial applications, offering the capability to perfectly stabilize loads even in static positions. This reduces system costs while enhancing operational safety.
Robust and Durable Industrial Design: A 156 mm body length and a 14 mm keyed steel shaft ensure the motor’s resistance to the heaviest mechanical loads and severe vibrations. This feature prevents slippage or rotation during operation, guaranteeing long-lasting and stable performance.
High Precision and Control: A step angle of 1.8 degrees, combined with micro-stepping capabilities, provides exceptional positioning accuracy and repeatability. This is critically important in applications like precision machining, robotics, and automated assembly lines, significantly boosting the overall system performance.

Project and Technical Support: If you are unsure about the compatibility of this product with your system or need assistance with the correct selection, you can receive free support from our technical engineers. Reach us via the “Ask a Quick Technical Question” button. For more detailed information, click the “Ask a Quick Technical Question” button within the product details for an instant response. Mermak is always here to assist you with your technical needs.

Technical Specifications

The product’s performance data and physical characteristics are detailed below:

Technical Parameter
Value / Description

NEMA Standard
Nema 34 (86 x 86 mm Flange) – The NEMA (National Electrical Manufacturers Association) standard specifies the motor’s mounting flange dimensions. Nema 34 indicates a square flange of 86×86 mm, which is standard for larger and more powerful motors.

Holding Torque
12.0 Nm (Newton-Metres) – Holding Torque is the maximum torque the shaft can exert when the motor is energized but not rotating. 12.0 Nm indicates exceptional holding power even when stationary, eliminating the need for a geared brake.

Body Length
156 mm (Extra Long Body) – The motor’s body length directly influences the volume of the internal windings and, consequently, the magnetic field and torque it can produce. 156 mm indicates a substantial coil volume necessary for this motor’s high torque capacity.

Shaft Diameter
14 mm Keyway – A keyed shaft uses a key (a small metal piece) and a corresponding groove (keyway) on the shaft and the connected component (like a pulley or gear) to prevent slippage. The 14 mm diameter provides sufficient strength for high torque transmission, and the keyway minimizes the risk of slippage between the shaft and the load.

Phase Current
Parallel: ~6.0A – 7.0A | Series: ~3.5A – Phase current is the amount of current flowing through each phase winding of the motor. Parallel and series connections alter the motor’s inductance, thereby changing its speed-torque characteristics. Higher current generally means higher torque output, and proper driver selection is crucial.

Step Angle
1.8 Degrees – The step angle is the minimum angle the motor can rotate in one full step. 1.8 degrees equates to 200 steps per revolution (360° / 1.8°), providing very high-precision positioning when combined with micro-stepping.

Rotor Inertia
4000 g.cm² (Very High) – Rotor Inertia is a measure of the motor shaft’s resistance to rotational changes. High inertia affects the motor’s acceleration and deceleration capabilities but also helps dampen vibrations for smoother motion. It reduces the risk of resonance, especially in heavy-load applications.

Recommended Driver
AC Drivers Only (DMA860H, MA860H or ND2278) – To achieve the full performance of this motor, professional step motor drivers with high voltage and current capacity, powered by AC input, are required. Traditional low-voltage or low-current drivers cannot overcome the motor’s inductance and will lead to torque loss.

Importance of Voltage
High Inductance and Torque Relationship – The large coils of the 12 Nm motor have high Inductance. As the motor reaches higher speeds, this inductance resists the flow of current in the coils, preventing the current from rising quickly and causing torque to drop. To minimize this effect and maintain torque at high speeds, using a high supply voltage that applies greater “pressure” to the coils is essential. With low voltage (e.g., 24V-48V DC), the motor can only exhibit its holding torque, not dynamic performance. The ideal operating voltage is around 80V AC – 110V AC or 110V DC.

Wiring Diagram
8-Wire Configuration (Parallel Connection Recommended) – 8-wire stepper motors allow for either series or parallel connection of the windings. Parallel connection reduces the motor’s inductance, providing better torque performance at higher speeds, which is ideal for CNC applications. Series connection offers higher torque at low speeds but limits maximum speed. The choice of connection type directly impacts the motor’s characteristics based on application requirements.

Industrial Application Areas

Heavy-Duty CNC Machining Centers

In CNC routers, milling machines, and lathes used for processing hard materials like marble, granite, wood, steel, and aluminum, the Step Motor Nema 34 12 Nm is crucial for precisely moving the cutting tool and maintaining its position under heavy machining loads. Its high holding torque reduces vibration during processing, extends tool life, and improves surface quality.

Large-Scale Automation Systems and Robotics

In automation lines involving the movement of large and heavy loads, such as industrial robotic arms, heavy-duty palletizing systems, and Automated Storage and Retrieval Systems (AS/RS), this motor provides precise control and safe positioning of high-inertia loads. Its high rotor inertia maintains stability even during sudden load changes, enhancing system reliability.

Packaging Machinery

The Nema 34 12 Nm is ideal for high-speed and precise packaging machines, filling systems, and labeling units, ensuring continuous and repeatable movements. Especially in lines handling large products or requiring precise positioning, the motor’s strong torque and accurate step control maximize production efficiency while minimizing error rates.

Operational Advantages

High Efficiency

The 12 Nm torque capacity allows the motor to operate at optimal speed and performance even under heavy loads. When integrated with high-voltage drivers, torque loss is minimized, increasing energy efficiency and maximizing the system’s overall performance output, thereby reducing operational costs.

Long Service Life

Designed for heavy-duty use, the robust 156 mm body and 14 mm keyed steel shaft ensure this motor is built to withstand the most demanding industrial conditions. This structural integrity reduces mechanical wear and tear, significantly extending the motor’s service life and minimizing maintenance needs.

Easy Integration

The standard Nema 34 flange size allows for easy integration into existing industrial systems. Its 8-wire configuration offers flexible adaptation options for series or parallel connections, catering to the specific speed or torque characteristics required by the application. Compatibility with professional AC drivers ensures a seamless installation process and reduces commissioning time.

At Mermak CNC, we are committed to delivering the highest performance and reliability for your industrial automation projects. The Step Motor Nema 34 12 Nm, with its engineering marvel design and superior power capacity, is poised to become an indispensable part of your most ambitious projects. If you seek a long-lasting, precise, and powerful solution, this motor will exceed your expectations. With Mermak’s assurance, elevate your projects to the pinnacle.

Compatible Products

Reducer Recommendations for Step Motor Nema 34 12 Nm

For Applications Requiring High Torque and Precision:
Nema 34 Servo and Step Planetary Reducer 1/5 FALCON

The Falcon series reducers multiply your Nema 34 stepper motor’s torque by 5 times, allowing you to move heavier loads with precision. They offer long-lasting and reliable performance with their high-quality construction.

For High Torque and Higher Resolution Needs:
Nema 34 Servo and Step Planetary Reducer 1/10 FALCON

With a 1/10 ratio, it increases your motor’s torque by 10 times while providing higher positioning accuracy. Ideal for applications where slow and powerful movements are critical.

For Applications with Space Constraints:
1/5 Nema 34 Right-Angle Planetary Reducers

The right-angle design allows you to change the motor’s mounting orientation, saving space in confined areas. It offers torque increase and precision with a 1/5 ratio.

For General Purpose Torque Increase and Speed Balance:
Step Motor Planetary Reducer 1/5

It increases your motor’s torque by 5 times, providing higher acceleration and more stable movement. It offers a balanced speed-to-torque ratio suitable for a wide range of applications.

For Higher Speed and Moderate Torque Increase:
Step Motor Planetary Reducer 1/3

With a 1/3 ratio, it reduces the motor’s speed less while still providing a significant torque increase. It offers a good balance for applications where speed is also important.

Driver Recommendations for Step Motor Nema 34 12 Nm

Most Suitable Driver for High-Torque Nema 34 Motors:
Step Motor Driver JSS860H

Specially designed for high-torque Nema 34 stepper motors. It typically offers current support up to 8A, ensuring your motor runs smoother and more stably at its full performance. Its high voltage and current capacity minimize step loss.

High Performance and Reliability:
Step Motor Driver Cwd860h

Similar to the JSS860H, it provides sufficient current and voltage capacity for your Nema 34 12 Nm motor. Its high-performance micro-stepping control contributes to quieter and vibration-free motor operation, making it ideal for applications requiring precise positioning.

For Cost-Effective and Basic Applications:
Step Motor Driver JSS556

A more budget-friendly option that provides basic control for Nema 34 motors. With a maximum current capacity of 5.6A, it may not utilize the full potential of your 12 Nm motor but can be sufficient for lighter loads or less critical applications. It is recommended to check your motor’s current requirements.

Power Supply Recommendations for Step Motor Nema 34 12 Nm

High-Performance DC Power Supply for a Single Motor:
60 Volt 10 Amper Power Supply Ms-600-60 600 Watt

Ideal for a single Nema 34 12 Nm stepper motor. The 60V output voltage ensures the motor operates more efficiently and powerfully at high speeds. The 10A current capacity meets all the motor’s needs and leaves sufficient margin for future upgrades. It’s a compact, lightweight, and highly efficient SMPS solution.

Standard and Reliable DC Power Supply for a Single Motor:
48 Volt 7.3 Amper Power Supply Lrs-350-48 350 Watt

Provides sufficient 48V DC power for a single Nema 34 12 Nm stepper motor. The 7.3A current capacity is adequate for stable motor operation. It’s a cost-effective, compact, and reliable SMPS solution offering easy installation and integration.

High-Capacity DC Power Supply for Two Motors:
48 Volt 12.5 Amper Power Supply Ms-600-48 600 Watt

Can comfortably meet the total current demand (approx. 12A) of two Nema 34 12 Nm stepper motors. With a 48V output voltage and 12.5A current, it’s a compact and efficient SMPS solution for dual-motor systems.

Robust and Flexible AC Transformer Solution for Two Motors:
60 Volt 18 Amper Transformer Power Supply (AC)

When converted to DC using an external bridge rectifier and capacitor bank, this AC transformer can supply sufficient current (approx. 10-12A DC) for two Nema 34 12 Nm motors. It offers a more robust and overload-resistant structure compared to SMPS, but requires additional components and assembly.

High Current AC Transformer Solution for Three Motors:
60 Volt 30 Amper Transformer Power Supply (AC)

This is the most suitable solution for meeting the high current demand (approx. 18A) of three Nema 34 12 Nm stepper motors. When converted to DC using an external bridge rectifier and capacitor bank, it provides reliable and durable performance in high-power applications. It may be larger and heavier than SMPS but is a cost-effective option for high current requirements.

The Step Motor Nema 34 12 Nm is an electric motor capable of precise angular positioning with a high torque capacity.

The NEMA 34 standard specifies the motor’s physical dimensions (86x86mm), while the 12 Nm value indicates the motor’s holding torque.

It is commonly used in applications requiring high precision and power, such as CNC machines, robotic systems, and industrial automation.

Frequently Asked Questions about Step Motor Nema 34 12 Nm and Technical Details

What voltage should I use to power this Nema 34 12 Nm motor to achieve full performance?

For high-torque stepper motors like the 12 Nm model, high voltage is critical to prevent torque loss, especially at higher speeds. The ideal operating voltage is around 80V AC – 110V AC or 110V DC. Due to the motor’s high coil inductance, when powered by low voltage (24V-48V DC), it can only “hold” its position and cannot reach sufficient speed, losing up to 80% of its performance.

Which driver should I use for the Nema 34 12 Nm stepper motor? Will it work with standard drivers?

This “Monster Series” motor should absolutely not be used with standard drivers like TB6600 or DM556; these drivers cannot power the motor and will overheat or burn out. To unleash its full power, you must use professional AC-input drivers (operating with 220V AC or 110V AC) such as DMA860H, MA860H, or ND2278.

Why is my Nema 34 12 Nm motor overheating? What could be the cause?

Overheating is typically caused by incorrect driver selection, low supply voltage, or improper current settings. Due to the motor’s high inductance, low-voltage and insufficient current-capacity drivers cannot properly power the motor, leading to overheating of both the driver and the motor. Using your motor with a high voltage of around 80V AC – 110V AC and the recommended AC drivers (DMA860H, MA860H) with the correct current setting (6.0A-7.0A for parallel connection) will resolve the overheating issue.

I will use my 12 Nm stepper motor on a CNC router. Should I connect it in series or parallel?

For applications like the X-Y axes of your CNC router that operate at high speeds and rapid movements, a parallel connection is mandatory. Parallel connection reduces the motor’s inductance, allowing voltage to fill the coils faster and minimizing torque loss at high speeds. This connection will require a current of 6.0A – 7.0A from the driver.

My motor is very powerful at low speeds but loses torque as speed increases. Is this normal?

Yes, this is normal for high-inductance stepper motors and is usually caused by low supply voltage. As the motor starts rotating, the coil inductance resists electricity, preventing sufficient current from entering the coils quickly, which causes a sudden drop in torque. The only way to overcome this is to power the system with a high voltage, such as 80V AC – 110V AC, and connect the motor in parallel. The higher the voltage, the longer the torque remains constant.

How should I set the driver current for the Nema 34 12 Nm motor?

The current setting depends on how you connect your motor. If you connect the motor in parallel (recommended for CNC Router X-Y axes), the driver will require a current of 6.0A – 7.0A. If you connect the motor in series (for low-speed, high-torque applications), it is expected to draw approximately 3.5A from the driver. You should set your driver according to these values.

I will use this motor on my heavy marble and granite CNC machine. Will it be sufficient?

Absolutely! This Nema 34 12 Nm “Monster Series” motor is the top tier of the “Heavy Duty” class. It is specifically designed for the most demanding industrial conditions, including marble, granite, and steel processing. Its immense holding torque and power are more than sufficient, especially for the gantry movements of machines processing tons of stone, even those operating underwater.

The motor’s shaft is 14mm and keyed. What does this mean, and what should I pay attention to during connection?

The 14mm keyed shaft is designed for high torque transfer under heavy loads. Unlike standard round shafts, a keyed shaft uses a “key” that fits into a groove on both the shaft and the connected component (pulley or coupling), ensuring that the component is fixed to the shaft. This eliminates slippage or rotation between the shaft and the connected component, even under high torque. When making connections, ensure that the coupling or pulley you use is compatible with a 14mm keyed shaft.

What is the advantage of having a rotor inertia of 4000 g.cm²?

A very high rotor inertia, such as 4000 g.cm², means the motor has a high capacity to dampen vibrations during movement and stopping. This results in more stable and smoother motion, especially in applications requiring precise positioning of heavy loads. High inertia also helps the system be more resistant to sudden external load changes.

Why is this motor called a “Servo Killer”? Can it replace a servo motor?

The nickname “Servo Killer” comes from its ability to hold tons of load in place without needing a geared brake, thanks to the immense holding torque it offers, especially at low speeds. While servo motors have advantages like high-speed precision and fast response times, this Nema 34 12 Nm stepper motor offers a powerful and economical alternative to servo motors, particularly in low-speed, high-torque applications where cost is a significant factor. It can provide performance close to servo motors in many heavy-duty applications.

What is the warranty period for the Nema 34 12 Nm motor purchased from Mermak CNC, and what are the warranty terms?

At Mermak CNC, we are confident in the quality of our products. Our Nema 34 12 Nm “Monster Series” stepper motors are offered under standard industrial warranty conditions against manufacturing defects. Please review your sales contract or contact our customer service for detailed warranty terms and current information. User-induced errors, such as incorrect voltage or driver usage, are not covered under warranty.

If I encounter problems during motor connection or setup, can I get technical support from Mermak CNC?

Absolutely. At Mermak CNC, we not only sell products but also place great importance on after-sales technical support. If you face any technical issues with the installation, connection, driver settings, or any other aspect of your Nema 34 12 Nm stepper motor, you can receive detailed technical support from our experienced engineers and technical team via phone or email. We are always here to help you get the maximum efficiency from your product.

Where can I find spare parts or compatible couplings for the 14mm keyed shaft?

You can obtain compatible couplings and other mechanical connection components for your Nema 34 12 Nm motor’s 14mm keyed shaft from Mermak CNC stock or through our authorized suppliers. If you require a specific part or coupling type, our technical support team can assist you in finding the most suitable solutions. You can also consult us for original motor shaft spare parts.

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NEMA Size	Nema 34
Brake Configuration	Standard
Shaft Diameter	14 mm
Dimensions	14
Torque	12 Nm

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