What are the Riveting Points of the Motor Stator and Rotor Iron Core?

Welcome to our blog, Our commitment to quality extends beyond providing motor laminations; we offer comprehensive stacking services that include riveting, cleating, laser welding, TIG+MIG welding, gluing, and self-bonding. Today, we’re delving into the riveting points of the motor stator and rotor iron core.

In this blog series, we uncover the riveting points that hold the stator and rotor iron cores together. These elements play a pivotal role in the operation of electric motors.

What is Riveting Point?

Stator bonding lamination is also called bonded stator technology. The same goes for the rotor. Riveting is a bonding and mechanical fastening process where multiple layers of the rotor or stator laminations stack together and have a certain stacking thickness.

The Riveting Point typically refers to specific locations or points within the rotor and stator core laminations where rivets or other fastening methods secure laminations together.

Using progressive stamping manufacture stator and rotor riveting points common along the outer circumference or inner diameter.

The compound stamping fabricated stator and rotor laminations need drilled holes. This drilling is a riveting point that commonly uses rivets to stack laminations.

riveting motor

Types Of Stator And Rotor Core Riveting Points

Round Buckle Riveting Points

One of our common types is round buckle riveting points typically having a circular or rounded shape. They in position within the stator or rotor laminations provide a strong and stable connection.

It has the advantage that the depth of the buckle cannot be too deep, and it will not buckle up if it is too deep. The rounded shape helps distribute stress evenly, reducing the risk of deformation or eddy current to the laminations. Round buckle riveting points commonly apply in stepping motors.

Square Button Point Riveting Points

Square button point riveting points which is also called V-type rivet point. For round button points, the accuracy requirements of the punch are not so high. Its disadvantage is that it will be deep and cause certain damage to the insulation layer of the iron core stamping. If the requirements are not too high, use this type of square button point.

square button point riveting points

Circular Arc Riveting Points

Circular arc riveting points have a curved or semi-circular shape. Choosing this shape due to the distribution of stresses evenly along the arc curve. The torsion chute also has an iron core with high requirements for moving goods and iron core.

Circular arc riveting points are often used in applications where the laminations need to withstand dynamic forces, vibrations, or varying loads, as the arc design helps absorb and distribute these forces effectively.

The selection of the specific riveting point shape depends on the motor design, the intended application, and the mechanical requirements of the stator and rotor laminations.

Types Of Rivet For Joint Iron Core

motor rivet types

Small motor cores usually use interlocked in the form of buckle points, however, for larger electrical iron cores we use rivets to connect the sheets together. Here are some common types of rivets for joining stator and rotor cores:

Round Head Rivets

It is a traditional rivet with a solid cylindrical shaft and a head on one end. They are well-suitable for applications where a high-strength, permanent connection. When joining thicker laminations in electric motor laminations commonly use solid rivets.

Flat head rivets

Flat-head rivets have wider heads and are usually used to join larger metal pieces.

Semi-Tubular Rivets

These have a tubular or semi-tubular shaft with a head on one end. These rivets are similar to solid rivets but have a partially hollow shaft. When need a secure but lighter-weight connection commonly use semi-tubular rivets.

Hollow Rivets

It has a hollow shaft and a head on one end. They are lightweight and suitable for applications where weight reduction is a consideration. When joining laminations made of thinner materials commonly use hollow rivets.

Blind Rivets (Pop Rivets)

Blind rivets, also known as pop rivets, are ideal for applications where access to only one side of the materials is possible. They have a hollow shaft and a mandrel (central pin). When installed, the mandrel is pulled through, expanding the rivet and forming a head on the blind side.

Pull rivets

Pull rivets, also called flow rivets, are rivets that can form a pull rivet head during the connection process. They are suitable where high-strength connections are required, such as in the aviation and aerospace sectors.

Large Flange Rivets

Large flange rivets have an extended flange or washer-like feature on the head. This extended flange provides additional support and load-bearing capacity, making it suitable for applications with high loads.

Stator And Rotor Iron Core Of The Motor Application

We produce electric motor cores for widespread application in various industrial fields. The key fields include industry motors, automotive motors, the aerospace sector, wind turbines solar trackers, etc.

Additionally, they play crucial roles in robotics, automatic equipment, manufacturing equipment, and household appliances.

Get High-Quality Electric Motor Lamination Stacks Services

If you’re in search of top-quality motor laminations, electric machine stators, rotors iron core processing, and stamping mold design services, your search ends here with Motorneo.  

We are a professional motor lamination manufacturer in China. Whether you require riveting, cleating, gluing, welding, self-bonding, or any other core process, we offer a comprehensive range of solutions, all at affordable prices.

Partner with Motorneo to elevate your motor development projects and witness high quality and high performance motor lamination stacks. Contact us today and let us serve your motor faster.

lamination stacks of industry motor cores


In conclusion, the riveting points of the motor stator and rotor iron core are the unsung heroes behind the operation of electric motors. Understanding these intricacies deepens your knowledge of motor construction.

Our comprehensive services, including riveting and riveting point solutions, are meticulously crafted to meet your exact requirements. Quality, precision, and affordability are at the heart of what we do, ensuring that your motor development projects reach new heights of efficiency and performance.


Why are riveting points important in electric motor construction?

Riveting points are essential because they ensure that the laminations within the stator and rotor cores remain securely fastened. This prevents the laminations from shifting or vibrating during motor operation, contributing to motor efficiency and reducing noise.

What is the purpose of different rivet head shapes in motor stator and rotor cores?

Different rivet head shapes, such as round, flat, or countersunk, are chosen based on factors like load-bearing capacity and the desired surface finish. For example, countersunk rivet heads are used when a flush surface is needed.

Are there alternatives to riveting points for joining stator and rotor laminations?

Yes, alternatives include welding, adhesive bonding, and mechanical fasteners. The choice of method depends on factors like material compatibility and desired joint strength.

What are the advantages of riveting point bonding?

Strong and Durable Joints

Riveting point bonding creates robust connections that are resistant to mechanical stresses and vibrations, ensuring the durability of the bonded components.

Quick and Efficient

The bonding process is relatively fast and efficient, making it suitable for high-volume production environments where speed is essential.

Minimal Heat Generation

Unlike traditional welding methods, such as arc welding, riveting point bonding generates minimal heat and the lowest iron loss, reducing the risk of warping or distortion in silicon steel materials.

No Need for Consumables

Unlike adhesive bonding, riveting point bonding does not require consumable materials like adhesives or solvents, reducing ongoing costs.

Precise Control

The process allows for precise control over the location and size of the bonding points, ensuring consistency and accuracy in manufacturing.

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