Why Use The Single Notching Process In Motor Laminations?

The single notching motor laminations process is a punching process. The stator and rotor core punching of the motor adopts a single-slot punching process. The mold design and manufacturing are relatively simple, suitable for small batch and prototype production, and have the characteristics of low cost and fast modification. With the development of high-speed grooving machines, production efficiency continues to improve, and the single-groove punching process is also developing rapidly.

What Is Single Notching?

The single-groove blanking process, also known as single-groove punching, is a specialized technique used in metal sheet fabrication and manufacturing. This process is particularly valuable for applications involving small-batch electric iron core lamination stacks products and intricate metal components.

Unlike traditional blanking methods that involve double blanking, where two separate operations are required to produce the final component, the single groove blanking process streamlines production. Compound die is the same punch, stator, or rotor groove completed at one time. How many slots correspond to the same number of punches, and punch size to achieve completion has always been difficult.

Single-slot stamping is by the same punch to complete all the slots, groove consistency is better. Motor stator and rotor laminations use the single groove blanking process that eliminates the need for secondary cutting or shaping processes, resulting in increased efficiency and reduced production time.

This method is especially advantageous for small batch production runs, where minimizing production steps is essential to cost-effectiveness. Additionally, it ensures high precision and consistency in component manufacturing, making it ideal for industries where accuracy is paramount.


Advantages Of Rotary Notching

Improved Magnetic Performance

Single notching optimizes the magnetic properties of motor laminations. Strategically placing notches, ensures a uniform magnetic flux distribution, leading to enhanced motor performance, reduced energy consumption, and longer motor lifespan.

Reduced Core Loss

Core loss is a significant factor in motor efficiency. Single notching reduces core loss by minimizing eddy current losses and hysteresis losses within the laminations. This results in energy-efficient motors that are not only more environmentally friendly but also cost-effective to operate.

Customization Options

Automation single notching offers flexibility in custom stator laminations for electric motor to specific needs. Whether you require unique rotor or stator designs, specialized winding configurations, or precise slot placement, we customize to meet your exact requirements.

Reduced Manufacturing Complexity

Compared to alternative notching methods, single notching simplifies the manufacturing process. The ability to create precise notches in a single operation reduces the complexity of production, minimizing the chances of errors. This leads to cost savings and quicker turnaround times.

Applications Of Single Slot Notching

Automotive Motors (Electric vehicles and hybrid vehicles)

Renewable Energy Systems

Medical Devices


Industrial Machinery

HVAC Systems

Electric Power Generation

single notching motor laminations application

Why Choose Us As Your Single Notching Motor Laminations China Manufacturer?

Motorneo 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.

We use a CNC rotary notching machine to ensure consistent slot dimensions, intricate patterns, and flawless execution. Whether you need intricate slot designs, precise dimensions, or cost-effective small-scale production, our customized 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.

rotary notching motor lamination


In most motor core manufacturers, single slots are used before product finalization and mass production. For extra-large motors, single-slot punching is also used due to the cost of investing in compound stamping dies and equipment capacity issues.


Can single notching be applied to different types of magnetic materials?

Silicon Steel: Silicon steel, also known as electrical steel or laminated steel, is motor lamination material. Single notching can be effectively applied to silicon steel laminations, optimizing their magnetic properties and improving motor performance.

Iron Alloys: Various iron alloys, including nickel-iron alloys and cobalt-iron alloys, are used in specialized motor applications. Single notching can be adapted to these materials to achieve precise slot placement and enhance the efficiency of motors utilizing such alloys.

Amorphous Metals: Amorphous metal alloys are known for their low core loss and high magnetic permeability, making them suitable for high-efficiency motors. Single notching can be employed to shape amorphous metal laminations, further improving their magnetic performance.

What is rotary notching?

Rotary notching involves the use of a CNC rotary notching press has a high precision positioning system and indexer with a rotating die or tool. This rotary motion allows for precise and continuous slot cutting. The outer diameter of the largest punching sheet we produce is as high as 1250mm.

Rotary notching offers an exceptional level of precision in slot placement. It’s quite a good and economical choice for large-size motor lamination production.

Can China manufacturers offer single-notching custom motor designs?

Yes, our single notching is highly customizable and can accommodate unique rotor and stator designs, making it suitable for a wide range of custom motor applications.

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