As an electric motor core parts manufacturer, Onlink produces custom stator cores, rotor cores, motor laminations and semi-finished BLDC stator rotor assemblies according to customer drawings and motor design requirements.
Our manufacturing scope covers precision die development, electrical steel stamping, lamination stacking and core assembly. For BLDC projects, further processing can include insulation installation, coil winding, permanent magnet insertion, dynamic balance calibration and dimensional inspection.
Onlink combines precision mold development, high-speed stamping, motor core fabrication and downstream assembly within one manufacturing workflow. ISO 9001 and IATF 16949 quality systems support customized and mass-production precision component programs.
Send your motor core drawing and application requirements to discuss material, tooling, lamination structure, tolerance and assembly options for your next project.
Which Motor Core Product Do You Need?
| Requirement |
Custom Motor Stator & Rotor Core |
BLDC Stator Rotor Assembly |
| Main Supply Form |
Laminated stator and rotor cores |
Wound stator + permanent-magnet rotor assembly |
| Core Material |
Electrical silicon steel |
Non-oriented electrical silicon steel |
| Main Processes |
Stamping, deburring, insulation coating, stacking, riveting/welding |
Core stamping, insulation, winding, magnet insertion and assembly |
| Custom Geometry |
ID/OD, slots, stack height |
Core geometry, winding and rotor magnet structure |
| Suitable For |
Industrial motors, servo motors, stepper motors and other custom motor designs |
Brushless DC motor projects |
| Best Choice When |
You perform downstream winding/assembly in-house |
You want to reduce downstream motor-core assembly operations |
View our Custom Motor Stator & Rotor Core or Brushless DC Motor Stator Rotor Assembly according to the required level of integration.
Electrical Steel and Motor Lamination Manufacturing
Motor core performance begins with the electrical steel and the accuracy of each stamped lamination.
Available core materials include cold-rolled non-oriented electrical silicon steels such as 50W470, 50W600 and 35WW300, with other material requirements reviewed according to the motor design.
The standard core manufacturing route can include:
- Precision progressive die development
- High-speed electrical steel stamping
- Burr removal
- Insulation treatment
- Fixed-height lamination stacking
- Riveting or welding
- Final dimensional inspection
For custom projects, the electrical steel grade, stator and rotor geometry, slot design and stack dimensions should be specified according to the motor's electromagnetic and mechanical design rather than selected as standard off-the-shelf dimensions.
Dimensions We Control in Custom Stator and Rotor Cores
For motor manufacturers, dimensional consistency affects winding, rotor/stator fit, air-gap control and downstream assembly. Key dimensions can therefore be defined directly from your 2D or 3D motor drawings.
Current precision capabilities for the custom stator and rotor core range include:
| Core Feature |
Published Dimensional Control |
| Inner Diameter |
±0.02 mm |
| Outer Diameter |
±0.03 mm |
| Slot Dimensions |
±0.015 mm |
| Stack Height |
±0.1 mm |
Additional product dimensions and inspection requirements can be reviewed during DFM according to the actual core structure and production process.
Motor Types We Support
Custom motor core parts can be developed for different electric motor architectures and equipment requirements, including:
Industrial asynchronous motors – custom stator and rotor lamination stacks for industrial drive systems.
Servo motors – precision core geometry for motion-control motor assemblies.
Stepper motors – customized lamination and slot structures based on motor drawings.
Brushless DC motors – stator/rotor cores or integrated wound-stator and permanent-magnet rotor assemblies.
Household appliance motors – motor cores and assemblies for compact drive applications.
Small new-energy drive motors – customized laminated cores according to motor geometry and assembly requirements.
Pump and conveyor BLDC motors – integrated BLDC stator and rotor assemblies for industrial drive equipment.
