Lamination Stacks Of Industrial Motor Cores in China

We are an industrial motor core lamination stacks manufacturing company that uses high technology to provide the best solutions for motor manufacturers.

With our extensive technology, we can provide our customers with die design, compound stamping, rotary notching, progressive stamping, lamination stacks, die-cast rotors, stator winding, and assembly of finished parts for prototyping and series production.

We help our customers in product development and recommend the technology that best suits their requirements.

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Stamping Capabilities For motor Lamination

As a prominent motor lamination manufacturer based in China, we specialize in delivering top-tier solutions for stamping electric motor laminations. Our expertise encompasses various advanced rotor and stator lamination stamping techniques, including compound stamping, progressive stamping, and rotary notching.

compound stamping motor laminations

Compound Stamping

Compound stamping is a highly efficient and precise manufacturing process that allows for producing complex and intricate rotor lamination and stator lamination cores.

This technique involves using a compound stamping die, which combines multiple operations into a single stroke. It begins with a coil of electrical steel fed into a compound die, simultaneously performing stamping operations such as blanking, piercing, and forming.

Over half of our compound stamping presses have been matched with automated systems. It enables high-speed production, improved dimensional accuracy, and enhanced repeatability.

Compound stamping is suitable for the medium size motor rotor and stator laminations. It is often used in Industrial Electric Motors, Electric Vehicles (EVs), Hybrid Electric Vehicles (HEVs), Renewable Energy Systems, Elevator Traction motors, etc.


Rotary Notching

Rotary notching is one of our core competencies; It Is specifically technology for creating precise and efficient notches in the rotor and stator laminations.

This process involves using a rotary notching tool that rotates at high speeds and removes electrical steel to create notches or slots in the laminations. Rotary notching is particularly beneficial in winding coils or assembly of motor components applications.

The outer diameter of our most extensive punching sheet is as high as 1250mm, currently the giant silicon steel coil’s width. This diameter is very suitable for large-size motor cores.

Using rotary notching in manufacturing, we ensure that our motor laminations have properly placed notches that facilitate efficient assembly, improve magnetic performance, and reduce energy losses.

progressive stamping

Progressive Stamping

Progressive stamping technology is our core competitive project. We utilize progressive machinery and precision tooling to meet industry requirements for motor stators and rotor cores.

Our progressive stamping involves a series of sequential steps, where the silicon steel sheet is progressively fed through the die, carrying out high-speed stamping. Many complicated cutters inside the tool are cutting, bending, forming, or piercing operations.

So it enables the production of motor stator and rotor laminations with tight tolerances and high precision. Small-size but large-volume motor laminations are very suitable to be produced in a progressive die stamping way.

Some application areas where progressive stamping motor cores are commonly used in Home Appliances, Industrial Equipment, HVAC Systems, Consumer Electronics, etc.

Rotor&Stator Laminations Stacks Process

We are professional motor lamination manufacturers. Our craftsmen seamlessly stack and assemble laminations with meticulous precision to create motor cores that meet the highest industry standards. Our lamination stacking process includes various methods, including riveting, cleating, laser welding, TIG and MIG welding, glue bonding, and self-bonding.

Glue Bonding

Gluing bonding lamination is the application of adhesive or glue to bond individual laminations together to form the core of an electric motor. The glue is typically a specialized epoxy or resin that provides excellent adhesion and thermal stability.

Self Bonding

Self-bonding property is activated through pressure and heat applied during the motor lamination stack assembly. As the laminations are compressed and heated, the self-bonding material on their surfaces forms a strong and secure bond, effectively creating a solid core structure.

Laser Welding

Laser welding employs a highly focused laser beam to join electrical motor stator laminations, resulting in a seamless bond with minimal heat-affected zones.

TIG+MIG Welding

TIG welding is used for delicate thin laminations that require complex connections without damaging the core material. MIG welding with consumable wire is ideal for high-volume, rapid-production electric motor lamination.


The riveting process is widely used in lamination stacks. This process involves the insertion of rivets through pre-drilled holes in the rotor core and stator core laminations and applying pressure to create a tight bond.


Cleating involves the insertion of cleats or tabs between individual motor stator lamination to provide additional stability and alignment within the motor core.

glue fastening motor lamination
self-bonding motor
laser welding
TIG welding Motor Lamination
riveting motor
cleating motor

Design and Manufacture Compound Die

Designing and fabricating precision compound stamping die is our company’s cutting-edge capabilities. Our proficient team leverages advanced technologies such as Wire Electrical Discharge Machining (Wire-EDM) and high-precision grinders to craft exceptionally accurate compound stamping dies.

Wire-EDM enables us to create intricate shapes and contours in the die components, ensuring the highest precision and repeatability. Then, our skilled craftsmen utilize state-of-the-art grinders to fine-tune the die surfaces, resulting in flawless finishes and optimal performance.

Our mold service department documents all settings and the number of mold strokes daily. With all this data, the current condition of the mold and estimated remaining life can be determined. Our customer-owned molds are free of charge for service and repair of molds during their everyday mold life.

compound die

Aluminum Die-Casting Rotor Lamination

Aluminum die-casting involves injecting molten aluminum alloy into a precisely designed compound die under high pressure. It allows for the formation of complex rotor shapes with excellent dimensional accuracy.

We can manufacture cast various sizes of aluminum rotors and a largest outer diameter of up to 1250mm and also can deliver aluminum cage rotors that meet the highest industry standards.

We can perform several checkpoints and inspections to ensure the quality of the aluminum die-casting motor rotor. First, we can visually inspect porosity, cracks, or unevenness surface defects, such as porosity, cracks, or unevenness.

aluminum die casting

In addition, we can employ non-destructive testing techniques such as x-ray inspection or ultrasonic testing to identify any internal defects or irregularities that may affect the performance of the motor rotor iron core. These tests ensure the integrity and reliability of the die cast rotors.

Stator Assembly Winding In Motor Manufacturing

Motor lamination stator assembly and winding are crucial steps in manufacturing electric motors. The stator assembly involves carefully arranging the motor laminations precisely and aligning them to create the stator core. This assembly process ensures optimal magnetic performance and efficient energy conversion within the motor.

On the other hand, winding refers to the process of winding insulated copper or aluminum wires around the stator core. The winding material select based on the motor’s specifications, considering electrical conductivity, heat resistance, and durability factors.

stator assembly winding

The winding line way can be customized based on the motor’s requirements, such as the number of poles, winding type (single-phase or three-phase), and desired torque-speed characteristics. The production capacity of the product specification needs to be more consistent. Basic 3-80 sets/day.

Applications Of Electric Motor Core

Motor rotor and stator core lamination find extensive applications across various industries and fields. They are commonly used in automotive applications, powering components such as electric power steering systems, pumps, and hybrid or electric vehicles. Motor cores are employed in machinery and equipment, including wind/fire power generators, pumps, compressors, conveyor systems, and robotics in the industrial sector.

Quality Control For Motor Stator & Rotor Lamination

Our commitment to excellence is underscored by adherence to international standards such as ISO/FDIS 9001:2008 and ISO/TS 16949 quality management systems. These certifications reflect our dedication to maintaining rigorous processes that consistently meet and exceed industry benchmarks.

quality control


The first is raw material inspection. We use special instruments to inspect the silicon steel sheet used in manufacturing and record the test results of its physical and electromagnetic properties.


The second is quality control in the production process. Our advanced quality control arsenal includes cutting-edge tools such as Coordinate Measuring Machines (CMM) and Projector Detectors. Ensuring each component is completed within the required dimensions and tolerances. Besides, for medium and large cast aluminum rotors, we use an X-ray system to check the porosity of the end rings.


The final step ensures that all components have been correctly assembled, there are no flaws or flaws in the stamping or lamination process, and that each product meets specified quality standards.

Why Choose Us As Your Industrial Motor Core China Manufacturer?

When choosing industrial motor lamination manufacturers in China, there are several reasons to consider us as your trusted partner.

industry motor core manufacturer

Firstly, we have established ourselves as a reputable and experienced manufacturer in the industry.

With years of expertise, we have honed our manufacturing processes and gained valuable insights into the complexities of industrial motor core laminations.

We adhere to strict quality control measures at every stage of production, ensuring that our motor core laminations meet high performance and high permeability, and reduce eddy current losses.

We use advanced technologies and employ skilled professionals dedicated to delivering superior products.

As industrial motor lamination manufacturers, we offer competitive pricing without compromising quality. Our cost-effective solutions enable you to optimize production costs while receiving high-quality motor rotor and stator core laminations that meet your specifications.

Materials Used In Industrial Motor Lamination

We need carefully chosen various motor lamination steel grades. We use the best domestic silicon steel sheet (silicon steel or laminated steel)0.10 to 1 mm thick as the primary material for composite stamping. This material exhibits high magnetic permeability, low core losses, and excellent electrical conductivity, making it ideal for motor cores. The use of electrical steel helps reduce energy losses and improve the overall efficiency of the motor.

motor core materials

Prototype Motor core lamination stacks

We understand the prototype process and provide prototyping lamination stacks services. These prototypes allow engineers and designers to evaluate motor designs’ performance, efficiency, and overall feasibility before committing to full-scale production. We use laser cutting and wire EDM laminations to prototype motor lamination stacks. We work closely with our clients to understand their requirements and provide customized prototype solutions. Our prototyping time is usually 5-15 days.

Motor Core Laminations FAQs

Motor iron core lamination manufacturing includes stamping, laser cutting, wire EDM, compound die manufacturing, cleating, riveting, gluing, and welding. These processes ensure the creation of precise laminations with specific shapes, sizes, and features.

The common motor lamination steel grades include non-oriented electrical steels (NOES) and grain-oriented electrical steels (GOES). NOES grades, such as M-19, M-27, and M-43, are suitable for motors with rotating components like rotors and stators.

GOES grades, such as M-6, M-15, and M-22, are specifically designed for applications requiring high magnetic induction in a specific direction, typically in transformer cores and high-efficiency motors.

Online research: Utilize search engines, industry directories, and trade platforms to find a list of manufacturers specializing in motor core lamination stacks in China. Please pay attention to their website, product information, and customer reviews.

Manufacturer verification: Verify the manufacturer’s legitimacy by checking their business licenses, certifications, and industry memberships. Look for established companies with a solid reputation and experience in the motor lamination industry.

Product samples and specifications: Request product samples or detailed specifications from potential manufacturers to assess the quality of their motor core lamination stacks. Evaluate the material used, the precision of the stacks, and overall workmanship.

Manufacturing capabilities: Inquire about their manufacturing capabilities, including production equipment, technologies, and quality control processes. A reliable manufacturer should have advanced machinery, a well-organized production line, and strict quality control measures.

Supplier assessment: Evaluate the manufacturer’s reliability and reputation by checking their track record, client references, and testimonials. Contact their previous customers to gain insights into their experiences and satisfaction with the manufacturer’s products and services.

Factory visit: If possible, visit the manufacturer’s facilities in person. This allows you to assess their production capabilities, quality control procedures, and overall operation. It also lets you discuss your project requirements and build a relationship with the manufacturer.

The choice between these techniques depends on factors such as the part’s complexity, production volume, required part accuracy, and specific application requirements.

Compound stamping suits complex parts with multiple forming operations, while progressive stamping is ideal for high-volume production.

Rotary notching is specialized for motor laminations requiring precise notches for winding alignment.

When selecting a manufacturer in China for compound or progressive dies, consider their experience, expertise, production capabilities, quality control processes, and customer reviews.

Review their portfolio of past projects, assess their ability to handle your specific requirements, and communicate your expectations and timelines to ensure a successful partnership.

Looking for An Industrial Electric Motor Lamination Stacks China Manufacturer?

If you are searching for industrial electric motor lamination manufacturers in China, look no further! Contact us. We can fulfill your requirements with our comprehensive range of services. With expertise in die cutting, stamping, stacking, and aluminum die casting processes, we have the capabilities to meet your specific needs.

Whether you need custom die designs, precise stamping operations, accurate stacking techniques, or aluminum die casting for motor laminations, we have you covered. Trust us to deliver high-quality motor laminations that meet industry standards and drive the performance of your industrial electric motors.