Nema 34 Stepper Motor 86mm High Torque Stepping Motor- Suzhou Retek Electric Technology Co., Ltd.

NEMA 34 Stepper: Maximum Torque and Industrial Strength

The NEMA 34 stepper motor, with its 3.4 inch (approx. 86mm) square face, is the choice for extremely high-torque requirements, serving as the power core for large-scale automation and heavy machinery.

These motors deliver continuous holding torque ranging from 4.0 Nm up to 15 Nm or more, making them comparable to many low-end servo systems in static and low-speed performance. The substantial mass and volume of the NEMA 34 allow for high thermal tolerance and the accommodation of robust, large-diameter shafts, ensuring mechanical integrity under high load. They are used when maximum force is required without the complexity of a servo drive system.

Introduction

Detailed Parameters and Performance Data

RETEK: Heavy-Duty Positioning and Indexing Power

Suzhou Retek Electric Technology Co., Ltd. focuses on maximizing the torque output and mechanical reliability of the NEMA 34 series. Our engineers optimize the magnetic field and winding geometry to achieve the highest possible static torque, which is essential for large gantry systems, plasma cutters, and heavy indexing tables. We guarantee the structural integrity and vibration dampening necessary for high-inertia load movement.

Applications

Advanced Technology Highlights

Heavy Industrial Applications for NEMA 34 Stepper Motors

Large Gantry Systems and Plasma/Water-Jet Cutters: Driving large, heavy moving axes. Challenge: Overcoming high inertia and frictional forces.
Automated Storage and Retrieval Systems (AS/RS): Positioning large vertical or horizontal loads in warehouses.
Indexing and Rotary Tables: High-torque rotation for welding positioners and multi-axis jigs.
Large Valve and Damper Actuators: Requiring very high torque to operate large, high-pressure fluid control systems.

Technical Specifications

Industrial & Commercial Usage

Technical Parameters (NEMA 34 Series)

Parameter	Range / Typical Value	Unit
Frame Size (NEMA)	34 (86mm)	Standard
Holding Torque	4.0 to 15.0+	Nm
Steps per Revolution	200	Steps
Phase Current (Rated)	3.0 to 8.0	A
Rotor Inertia	High (relative to size)	kg ⋅ m$^2$

Additional Information

Supplementary Details & Notes

Integrated Production and Customization Workflow

The manufacturing process for NEMA 34 motors involves high-precision rotor-stator alignment and meticulous coil bracing to prevent movement under high vibration. The motor's thermal performance is validated via sustained load testing.

Shaft Customization: Customizing the shaft with a keyway, specific thread, or double-ended design to support a brake or encoder on the non-drive end.
Winding Optimization: Tailoring the winding to match specific industrial drive voltages and current limits, maximizing performance within the client's system constraints.
Integrated Brakes: Factory installation of a high-torque safety brake unit (spring-applied, power-off type) for vertical axis or emergency stop compliance.
Connector Upgrades: Providing specific IP-rated industrial connector solutions (e.g., M23 power and signal connectors) for fast, reliable field wiring.

Service & Support

Technical Advantages and Core Design Features

Exceptional Static Holding Torque: The motor's primary feature, providing a massive resistive force to external loads when stationary.
Mechanical Rigidity: Oversized shaft (12.7mm or 14mm) and robust bearings handle high radial and axial loading associated with driving heavy systems.
High Thermal Capacity: The large motor volume allows the dissipation of significant heat generated by high continuous currents, ensuring stable performance.
Cost-Effective Power: Offers high power density and precision at a significantly lower total system cost than high-torque AC servo systems.
Six or Eight-Lead Options: Provides wiring flexibility, allowing the motor to be wired in full-coil (high-speed) or half-coil (high-torque) configurations.

Frequently Asked Questions

Common Inquiries Regarding NEMA 34 Steppers

Q: Can the NEMA 34 motor operate at speeds above 1000 RPM?
A: While technically possible, the torque at these speeds is severely limited. Steppers are best suited for speeds under 500 RPM where their torque performance is maximized. For high-speed applications, a BLDC or servo motor is recommended.

Q: How do I manage the heat generated by an 8A phase current motor?
A: For continuous high-torque operation, external cooling is often necessary. We recommend mounting the motor to a large aluminum plate (acting as a heat sink) or integrating a dedicated motor cooling fan unit, particularly for the longer-stack versions.

Q: Is open-loop control sufficient for a high-torque system like NEMA 34?
A: For most indexing and low-speed applications, yes. However, for systems where missing a single step could lead to catastrophic failure (e.g., plasma cutting), a closed-loop stepper drive with encoder feedback is highly recommended for added security and dynamic torque reserve.

Resources

Advanced Material Selection Guide

Magnets: Premium NdFeB magnets are used to achieve the maximum possible magnetic flux density and high holding torque.

Shaft: High-carbon steel, precision ground and often case-hardened for superior wear resistance and torsional strength.

Terminal Connections: Uses robust screw terminals or industrial connectors (M16/M23) capable of reliably handling the high phase currents (up to 8A).

About Suzhou Retek Electric Technology Co., Ltd.

Unlike other motor suppliers, Retek engineering system prevents the selling of our motors and components by catalogue as every model is customized for our customers. The customers are assured that every component they receive from Retek is designed with their exact specifications in mind. Our total solutions are a combination of our innovation and a close working partnership with our customers and suppliers.

As China Nema 34 Stepper Motor 86mm High Torque Stepping Motor Manufacturers and Wholesale Nema 34 Stepper Motor 86mm High Torque Stepping Motor OEM/ODM Suppliers, Retek business consists of three platforms: Motors, Die-Casting and CNC manufacturing and wire harness. Retek products are widely supplied for residential fans, vents, boats, airplanes, medical facilities, laboratory facilities, trucks and other automotive machines.

Welcome to send us an RFQ, it is believed you will get the best cost-effective products and services here!

Customized Solutions

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Global Export

Suzhou Retek Electric Technology Co., Ltd.

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