tator and Rotor Lamination Solutions for Brushless Electric Motors

Brushless Electric Motor Introduction

A brushless electric motor (BLDC motor or PMSM) is widely used in new energy vehicles, home appliances, medical devices, drones, and industrial automation. This is due to its high efficiency, long service life, low noise, and minimal maintenance requirements.
The overall performance of a brushless motor depends heavily on the precision of its stator and rotor lamination stack. In addition, the quality of silicon steel used and the accuracy of the lamination bonding process are crucial.

High-quality stator laminations and rotor laminations reduce iron loss. They also improve magnetic flux consistency, increase torque density, and ensure stable performance during high-speed operation. To support these demanding applications, Best provides advanced motor lamination and bonding solutions designed to reduce energy loss. Furthermore, our solutions maximize motor efficiency.

Stator and Rotor Lamination Solutions

With more than 20 years of experience in motor core design, lamination stamping, and assembly, Best delivers a complete range of custom stator and rotor lamination services. These services are tailored to your project specifications.
Our available lamination processes include:

• Riveting point self-fastening – Fast, secure bonding for small and medium motor laminations

• Laser welding – High precision, high strength, ideal for high-speed motors and EV applications

• Argon arc welding (TIG welding) – Strong joint stability and excellent thermal resistance

• Adhesive bonding – Low noise, low loss, suitable for premium high-efficiency motors

• Rivet riveting – Cost-effective and reliable for large-production-volume motors

These optimized lamination technologies help reduce core loss, maintain magnetic uniformity, and significantly improve motor performance, production efficiency, and long-term reliability—helping customers enhance competitiveness in demanding industries.

Advanced Mold Design Capabilities

Best offers complete mold design and manufacturing for motor stator and rotor laminations. During the design stage, we consider product size, silicon steel thickness, and end-use needs. As a result, our solutions support lamination sizes from 5 mm to 800 mm.

In addition, our in-house production capabilities include:

• First, wire cutting uses high-precision tools to achieve accurate results.

• Next, single punch dies support prototypes and small-batch production.

• Meanwhile, composite molds suit medium-volume stamping needs.

• Finally, tungsten steel progressive dies enable fast stamping and long service life for mass production.

Together, these capabilities allow us to deliver stable, high-quality laminations for projects of any size.

These capabilities allow us to meet diverse needs from BLDC motors, axial flux motors, hub motors, servo motors, and industrial high-speed motors.

Quality Control and Testing

To guarantee stable and consistent product quality, every stator and rotor lamination undergoes rigorous inspection and testing before shipment:

• Size inspection – 100% full-size measurement, exceeding AOL sampling standards

• Appearance inspection – Visual checks to ensure no burrs, deformation, or defects

• Electrical testing – All wound stator cores are tested before and after varnish immersion to ensure electrical performance, insulation strength, and reliability

Our strict quality system ensures each lamination stack meets international standards. These standards are for energy efficiency, safety, and durability.

Packaging and Shipping

To ensure safe worldwide delivery, we pack all products with care.

• Shipping options include DHL, FedEx, UPS, TNT, and trusted freight carriers.
• Inner packing uses rust-proof paper, anti-rust oil, and 20 mm protective foam.
• Outer packing consists of strong cardboard boxes or reinforced plywood crates for export.

This packing method protects stator and rotor parts from rust, impact, and damage during transport.