Rotary Notching Motor Laminations in China

We have many years of experience in motor lamination manufacturers in China and have various stamping motor lamination stack capabilities, such as rotary notching, compound stamping, and progressive stamping.

Our rotary notching uses a CNC automatic notching machine which can manufacture high-precision motor and generator laminations. Aside, we offer customized motor stator and rotor services to your requirements. 

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rotary notching motor laminations

Rotary notching Capabilities For Lamination Stacks

Rotary notching is one of our core projects. Our slot rotation accuracy is controlled by a servo motor, which can produce high-precision motor rotor and stator laminations.

The process involves loading thin silicon steel sheets onto a CNC rotary notching machine. The machine is equipped with special tools and fixtures to cut and shape the electric steel according to the patterns designed by the computer.

Our rotary notching process is excellent for medium and large motor core production. We produce the largest punch sheet with an outer diameter of up to 1250mm.

Whether intricate designs or larger-scale productions, our CNC and auto machine can handle diverse specifications.

rotary notching die

Die Cost And Manufacture Time

Rotary notching is an economical choice for low-to-medium volume production or prototyping. Unlike traditional manufacturing methods that often entail substantial expenditures on intricate tooling, this process significantly mitigates tool costs.

This is attributed to the process’s precision and automation, which minimizes the need for elaborate and expensive tooling.

Moreover, the manufacturing time of rotary notching molds is remarkably expedited, typically requiring only one to two days for completion.

Advantages of producing motor stators and rotors

Rotary notching offers distinct advantages when applied to both motor stators and rotors, enhancing their performance, efficiency, and overall functionality. Here are the key benefits of utilizing rotary notching for both components.

Precision &Consistency

Our use of computer a control CNC rotary notching machine ensures that each slot is accurately cut to the desired dimensions, minimizing size and shape variations.

Suit Large Laminations

It is well-suited for creating large motor lamination rotary notching and creating motor cores for a broader range of motor sizes and applications.


This process of mold manufacture has cost-effectiveness, especially for small-scale production. The automated nature of the process reduces labor costs.

Custom Designs

We provide custom motor stator and rotor lamination design and fabrication services. We also need to ensure the magnetic flux and cooling efficiency of the motor, even for smaller production quantities.

Reduced Material Waste

The precision of rotary notching minimizes material waste during the machining process. Tight tolerances and accurate slot creation mean fewer error laminations size.

Improve productivity

Because it is a high-speed machining process that can rapidly slot in motor laminations, the automated nature of the CNC rotary notching press improves production rates.

Customized rotary notching motor lamination stacks

We use the single notching process to manufacture electric motor laminations applied in many industries and areas, such as servo motors, industry generators, and automotive.

motor stator core
motor stator&rotor lamination
stator lamination
electric stator core

Quality Control For Rotary Notching Motor Lamination

Precision and consistency are paramount when producing high-performance electric motor lamination, and our rigorous quality control measures ensure that every lamination meets the highest standards.


Our quality control measures extend to material inspections to detect defects. We prioritize the material integrity and durability of our rotary notched motor laminations and work with top-quality materials.


We recognize that even the slightest deviation can impact motor performance. Our quality control experts monitor and maintain strict dimensional accuracy and tolerance control throughout the rotary notching process.


Before a rotary notched motor lamination enters the final assembly, it goes through comprehensive inspections and tests. Our quality control team carefully examines each lamination to verify slot dimensions, alignment, and overall integrity.

rotary notching quality

Materials Used In Electric Motor Core In China

Motor lamination stacks used in rotary notching are typically composed of specialized materials that exhibit specific magnetic and mechanical properties suitable for efficient motor operation.

So, common materials used in electric motor cores include Electrical Steel(Silicon Steel), Amorphous Metal Alloys, Grain-Oriented Electrical Steel (GOES), Nickel Iron Alloys, and Powder Metal Cores.

motor core materials

Why Choose Us For Rotary Notching Motor Laminations?

Our team of skilled professionals with years of stamping, stacking, winding, and assembly experience deeply understands rotary notching processes, ensuring that your motor laminations are meticulously crafted to the highest standards.

rotary notching choose us

We use a CNC rotary notching machine to ensure consistent slot dimensions, intricate patterns, and flawless execution, elevating your motor core designs to new heights.

In addition, we can provide customized services. Whether you need intricate slot designs, precise dimensions, or cost-effective small-scale production, our manufacturing process meets your needs.

Our quality experts strictly check every process of single grooving blanking, guaranteeing laminations that meet stringent accuracy, durability, and performance standards.

Prototype Motor core Laminations 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 work closely with our clients to understand their requirements and provide customized prototype solutions. Our prototyping time is usually 2-5 days.

Motor Core Laminations FAQs

To explore customized rotary notching solutions for your motor lamination requirements, please get in touch with us for a consultation. Our team of experts will work closely with you to understand your needs and provide tailored solutions.

Compound stamping involves multiple operations on a single sheet in one press stroke, which is suitable for complex parts.

Progressive stamping uses a continuous strip for sequential operations, which is efficient for the high-volume production of repetitive parts.

Rotary notching is a precision process for creating slots in motor laminations, enhancing motor performance.

Each lamination stamping has advantages and applications, and the choice depends on factors like part complexity, volume, and the desired features in the final product.

Motor lamination stacking involves assembling individual laminations to create the core structure of an electric motor. Here are some common methods of motor lamination stacking:

Welding involves fusing laminations using heat or pressure. Welded stacks offer good mechanical strength and stability. Various welding techniques, such as tig+mig or laser welding, can be employed depending on the material and design requirements.

Riveting involves using small metal fasteners (rivets) to join the laminations. This method provides mechanical solid connections and is particularly suitable for laminations that require frequent disassembly or repairs.

Cleating involves adding small metal tabs or cleats to the laminations that interlock when stacked. This method enhances alignment and stability, improving magnetic coupling and reducing vibration.


Gluing 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 employs adhesive materials to bond laminations together. Adhesives can be applied in liquid or film form and are cured to create a solid bond. Self-bonding can provide excellent insulation and minimize air gaps between laminations.

Single notching motor laminations find utility in a variety of industries where efficiency, compactness, and precise control are paramount.

One notable application is in the field of electric mobility, where single-slot laminations are used in electric vehicle (EV) traction motors.

Additionally, industries such as aerospace benefit from single-slot laminations in actuators and servos, ensuring precise and reliable motion control in aircraft and spacecraft.

Their versatility also extends to robotics, medical devices, and industrial automation.

Online Research:
Research online using search engines, business directories, and industry-specific platforms. Look for manufacturers specializing in motor laminations and have a strong presence online.

Sample Evaluation:
Request samples of motor laminations to assess their quality, precision, and suitability for your applications.

Factory Visit:
If feasible, plan a visit to the manufacturer’s facility in China. This allows you to evaluate their production capabilities, quality control practices and establish a direct relationship.

Cost and Pricing:
Obtain detailed quotes from multiple manufacturers, considering material quality, production volume, lead times, and shipping costs.

Quality and Certifications:
Ensure the manufacturer adheres to international quality standards and possesses necessary certifications, such as ISO 9001. Verify their ability to meet your specific quality requirements.

Tell Us About Your Rotary Notching Motor Lamination Needs

Do you want to take your motor core to the next level? Take the first step towards enhancing your motor core designs with our advanced rotary notching solutions.

Our team of experts is eager to collaborate and provide tailored solutions that align with your unique requirements. Whether you seek intricate slot patterns, rapid mold manufacturing, or motor lamination quality, we can help you make it happen.