How Stator Cleating Impacts Motor Performance?

Have you ever considered how stator cleating can significantly influence the performance of electric motors? Stator cleating, a critical component in motor assembly, plays a pivotal role in enhancing motor efficiency and reliability. In this blog post, we’ll delve into the fundamentals of stator cleating, explore its various types, and examine how it affects motor efficiency across different applications.

The Fundamentals of Stator Cleating

cleating motor

The primary function of stator cleating is to maintain the alignment and positioning of the stator laminations. Clamping notches vary from 2 to 16 per stator, depending on the electric motor size. The location of the cleat notches should be in line with a lamination tooth or slot opening.

On large stators with many splints, they must be evenly distributed around the perimeter of the stator and are always two notches 18 degrees apart.

Types of Stator Cleating

V-Pin Cleating

V-Pin cleating is a common method where V-shaped pins secure the laminations. This technique offers reliable stability and applies to industrial motors.

Wire Cleating

Wire cleating involves wrapping wire around the laminations, creating a tight bundle. Choose this approach for its simplicity and effectiveness.

Keyhole Cleating

Keyhole cleating uses specially shaped slots and keys to secure laminations. This technique is preferred for its ease of assembly and disassembly.

The Impact on Motor Efficiency

So, how exactly does stator cleating influence motor efficiency and performance?

Magnetic Circuit Improvement

Stator cleating optimizes the magnetic circuit within the motor by ensuring that the laminations are in close contact. This minimizes magnetic flux leakage and enhances the overall magnetic efficiency.

Reducing Energy Losses

One of the primary functions of stator cleating is to reduce energy losses. Hysteresis and eddy current losses cause these losses, which occur when not securely cleated the laminations. Stator cleating helps counteract these losses, resulting in improved motor efficiency.

Factors Influencing Cleating Design

The design of stator cleating isn’t arbitrary; several key factors have a direct impact on motor performance and influence it.

Material Selection

Cleats must be compatible with these laminations, typically silicon steel materials to prevent chemical reactions or corrosion.

Mechanical Requirements

Cleats must be strong enough to maintain the integrity of the lamination stack under operational stresses, including vibrations and thermal expansion.

Thermal Considerations

Heat Dissipation: Cleats should not impede the motor’s ability to dissipate heat generated during operation. So considering the thermal conductivity of the cleat materials and their configuration within the stator.

Thermal Expansion: Materials for cleats should be chosen based on their thermal expansion coefficients, which should closely match those of the laminations to avoid separation or distortion at operating.

Application Area

industrial electric motor application

Industrial Motors

Stator employs cleating to stack lamiantions and is suitable for industrial motors, which power heavy machinery and equipment.

HVAC Systems

The stator uses clip-to assembly for heating, ventilation, and air conditioning (HVAC) systems that rely on electric motors to maintain temperature control in residential and commercial buildings.

Rail Transportation

Electric train systems rely on cleating electric motors for propulsion and various operational functions.

Automotive Sector

Cleating stacking is suitable for electric motors are increasingly integrated into the automotive industry for various applications, including power steering systems, window regulators, and electric vehicle propulsion.

Renewable Energy

Electric generators used in wind turbines and other renewable energy systems benefit from efficient stator cleating.

Let Motorneo Assembly and Stack Motor lamination

cleating machine

We depend on the desired core length; the motor stator core lamination is performed with galvanized tape /CR tape up to 2 mm thick to stacks. These motor cores are assembled by pressing steel strips into notches around the laminations. The cleating is usually folded over the end of the stator core.

Whether you’re in the automotive, industrial, or aerospace industry, our tailored solutions enhance motor efficiency across various applications.


By understanding the various aspects of stator cleating, from different cleating types to factors influencing design and applications in various industries, we can harness its potential to optimize electric motor performance.


What are stator laminations, and why are they stacked in electric motors?

Stator laminations are thin, typically electrical steel, sheets used in the construction of the stator core in electric motors. They are coated with an insulating material to minimize energy losses and enhance the motor’s performance.

These core laminations are stacked together to form the stator core, creating a compact and efficient magnetic circuit. The stacking process is essential to reduce eddy current losses and hysteresis, resulting in improved motor efficiency and performance.

It also contributes to the robustness and structural integrity of the motor, ensuring long-term reliability.

Why is precision crucial in stator cleating design?

Precision is crucial in stator cleating design because it directly impacts motor efficiency and performance. Cleating must ensure that the laminations are held together with tight tolerances, minimizing gaps and maintaining close contact.

Precise cleating reduces energy losses caused by hysteresis and eddy currents, which occur when laminations are not securely fastened.

Tight cleating also optimizes the magnetic circuit within the motor, enhancing its magnetic efficiency. This precision is fundamental to ensuring that the motor operates at its full potential, offering improved energy savings and reliability.

What are the advantages of using stator cleating in the stacking process?

Stator cleating enhances motor performance by reducing energy losses, improving the magnetic circuit, and ensuring the laminations remain securely fastened over the motor’s lifetime.

What are the bonding technologies of motor lamination in China?

Riveting involves fastening the laminations together using rivets or pins. This method provides a mechanical connection that ensures laminations remain aligned and stable. Riveting is particularly suitable for larger motor cores.

Welding involves laser and TIG+MIG welding, fusing the laminations using heat or pressure.

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.

Self-bonding property is through pressure and heat applied during the motor lamination stack assembly.

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