How to Manufacture Electrical Motor Stator & Rotor Stacks by Compound Die Stamping?

Welcome to our comprehensive guide on the art and science of “Manufacture Motor Lamination by Compound Stamping.” If you’re looking to learn more about this innovative process, you’ve come to the right place.

In this article, we’ll take you through the steps, from understanding electrical motor components to the intricacies of compound die stamping, and provide you with valuable insights into material selection, and quality control.

What are Stators and Rotors?

manufacturing motor iron core

Electrical motors are the workhorses of our modern world, powering everything from household appliances to industrial machinery. At the heart of these motors are two critical components: the stator and rotor.

Stator and rotor stacks consist of laminated iron cores. These cores use thin, insulated iron sheets that stack together to reduce energy losses, hysteresis, and eddy currents, and improve magnetic flux. This core construction is vital for electric motor efficiency.

The stator is the stationary part of the motor core, while the rotor is the rotating component. The stator typically consists of coils and laminated iron cores, while the rotor rotates in the stator. This interaction generates the electromagnetic force required for the motor to function.

The stator’s coils create a magnetic field when an electric current passes through them. Simultaneously, the rotor is subjected to this magnetic field, causing it to turn and drive the mechanical load connected to the motor. This simple yet ingenious design is the basis for most electric motor systems.

Understand Compound Die Stamping

Compound die stamping is a manufacturing process that offers significant advantages when producing stator and rotor lamination stacks for electric motors.

Compound die stamping is a stamping technique that combines multiple operations, such as blanking, piercing, and forming, into a single process. It is a highly efficient and precise method of manufacturing complex metal parts.

Step-by-Step Guide to Compound Die Stamping

Certainly, let’s explore the step-by-step guide to the efficient technique of manufacture motor lamination by compound stamping. This process lies at the core of producing the critical components for electric motors, ensuring they operate at their best efficiency.

Preparation Process

Material Selection: Start by choosing the appropriate material for your stator and rotor cores. Silicon steel(electrical steel) is commonly used due to its magnetic properties and low energy loss. Ensure the material is of the correct grade and thickness for your specific application.

Blank Cutting: Cut the selected material into blanks of the required size. The blanks should match the dimensions specified in your design and engineering phase.

Compound Die Setup

Select the Right Die: Choose the compound die that matches the design and shape of the stator and rotor stacks. The die will consist of upper and lower components designed to perform multiple operations in a single stroke.

Hydraulic Press Setup: Position the compound die in a hydraulic press. Ensure the press is properly calibrated and adjusted to accommodate the material thickness and the required tonnage for stamping.

Lamination Stamping Process

Feed the Blanks: Place the prepared blanks into the die, ensuring proper alignment and positioning. The material must be secured to prevent movement during the stamping process.

Stamping Sequence: The compound die will perform various operations in one stroke. This typically includes blanking (cutting the outer shape), piercing (creating holes or slots), and forming (shaping the material). Coordinate multiple actions to create a complete motor lamination.

Precision and Speed: The hydraulic press delivers a controlled force to the die, ensuring precision and consistency in the stamped components. The process is rapid and efficient, completing multiple operations in a matter of seconds.

Quality Control

Inspect Stamped Components: After each cycle, inspect the stamped stator and rotor stacks. Check for dimensional accuracy, material integrity, and the absence of defects.

Dimensional Checks: Ensure that the stamped components match the design specifications, including dimensions, hole sizes, and shapes.

Visual Inspections: Examine the surfaces for any blemishes, burrs, or imperfections that may affect performance or assembly.

Advantages of Compound Die Stamping

Manufacture motor lamination by compound stamping stands as a testament to the numerous advantages that compound die stamping offers, making it the highly attractive choice for producing stator and rotor stacks.


By reducing material waste and streamlining the manufacturing process, compound die stamping can significantly reduce production costs.

Precision and Consistency

The process ensures that each stator and rotor stack meets tight tolerances and maintains a high degree of precision.

Time-Saving Benefits

Efficiency gains from combining multiple operations into one process result in faster production, allowing for quicker delivery times.

Application of compound die stamping motor iron core

Manufacture motor lamination by compound stamping is widely used across various industries and applications. Here are some key sectors where compound die-stamped motor iron cores play a crucial role:

Electrical Motor Industry

Compound die-stamped motor iron cores are used in a wide range of electrical motors, from small appliances like fans and blenders to industrial machines, electric vehicles, and HVAC systems.

Automotive Industry

The automotive sector relies on compound die stamped motor iron cores for various applications, including electric and hybrid vehicles.

Industrial Machinery

Many industrial machines and equipment use electric motors, and compound die stamped motor iron cores are employed in these industrial motors. Industries such as manufacturing, agriculture, and construction rely on these motors for their various applications.

Renewable Energy

Compound die stamped motor iron cores are crucial components in generators and alternators used in wind turbines and other renewable energy systems.

Power Generation and Distribution

Electric generators and transformers also incorporate motor iron cores manufactured using compound die stamping. These cores help generate and distribute electricity efficiently and reliably.

Consumer Electronics

Smaller electric motors used in consumer electronics, like smartphones, cameras, and drones, benefit from the precision and compactness of compound die stamped motor iron cores.

Aerospace and Defense

Aerospace and defense industries use electric motors in various applications, including aircraft systems, radar equipment, and missile guidance systems.

Medical Devices

Medical equipment often includes small, high-precision electric motors for tasks like controlling surgical instruments or providing mobility assistance.

Home and Building Automation

Smart homes and automated buildings rely on electric motors for tasks like controlling HVAC systems, lighting, and blinds.

In summary, compound die-stamped motor iron cores find application in a wide array of industries and technologies due to their precision, efficiency, and ability to meet specific design and performance requirements. These cores are integral to the functioning of countless devices and systems in our modern world.

rotor laminations application

Our Motor Lamination Stamping Capabilities

Are you looking for the ultimate solution to your compound die stamping needs? We are a motor core lamination manufacturing company in China and provide our customers with motor core lamination compound stamping services.

With our cutting-edge capabilities in compound stamping tool design and manufacturing, as well as our expertise in crafting custom rotor and stator lamination stacks, we’re here to bring your projects to life with unmatched quality and precision.

Our team of dedicated professionals is committed to delivering customized solutions that meet your specific requirements. Whether you need intricate designs, tight tolerances, or cost-effective production, we have the experience and technology to make it happen.

Don’t compromise on the quality and performance of your electrical motor components. Contact us today and let’s discuss how our compound stamping expertise can elevate your projects.


In conclusion, compound die stamping is a highly efficient and cost-effective method for manufacturing motor core lamination. Its ability to combine multiple operations into a single process, while maintaining precision and consistency, makes it an attractive choice for manufacturers in various industries.

By understanding the process, material selection, and quality control measures, manufacturers can ensure the production of high-quality stator and rotor stacks that meet industry standards. Additionally, the eco-friendly aspects of compound die stamping contribute to a more sustainable manufacturing process.

As technology continues to advance, we anticipate that compound die stamping will play an even more significant role in the manufacturing landscape, further improving efficiency and sustainability.


What method is used to stack the laminated sheets of compound stamping together?

In the assembly of laminated sheets for compound stamping, several methods can be employed to stack and secure the sheets together.

Common techniques include riveting, where sheets are fastened with metal rivets, or cleating, which involves using specialized fasteners to hold the laminations in place.

Additionally, laser welding and TIG/MIG welding can be utilized for a more permanent and robust bond.

For applications where rigidity and insulation are essential, gluing with specialized adhesives can be employed.

The choice of method depends on the specific requirements of the component and the desired performance characteristics.

How does compound stamping differ from progressive stamping?

Compound vs. progressive stamping, how much do you know? Compound stamping is a process that combines multiple operations (blanking, piercing, and forming) in a single die and press stroke.

Progressive stamping, on the other hand, involves a series of sequential operations on a metal strip as it moves through a set of dies.

Compound stamping is more suitable for parts with complex shapes, while progressive stamping is ideal for high-volume, simpler parts.

How does stamping compare to laser cutting for producing metal parts?

Stamping and laser cutting are different processes. Stamping is ideal for high-precision, repetitive, and high-volume production of metal parts, while laser cutting is more suitable for creating intricate designs and prototypes, including non-metallic materials. The choice depends on the specific project requirements.

What materials are commonly used for stator and rotor stacks?

The materials commonly used for stator and rotor stacks, especially in electrical motors, are primarily oriented toward optimizing magnetic properties and reducing energy losses.

While nickel and cobalt alloys are not typically used for stator and rotor stacks, the most common material for these components is thin-gauge electrical steel

Silicon steel, also known as electrical steel, is chosen for its excellent magnetic properties, low energy loss (hysteresis and eddy current losses), and good electrical conductivity.

The specific grade and thickness of silicon steel can vary depending on the application, but it remains the primary choice due to its exceptional performance characteristics in the realm of electrical motors.

Try to contact us for high-quality motor cores in China.