Progressive Die for Stator Cores Manufacturing
High-precision progressive dies for consistent motor laminations, accurate slot geometry, low burrs, and efficient high-volume stamping.
A progressive die is a precision stamping tool that performs multiple manufacturing operations in a single press stroke. As electrical steel moves through successive stations, processes such as punching, piercing, notching, forming, and blanking are completed continuously. This enables high production efficiency while maintaining tight dimensional tolerances and excellent repeatability.
What Is a Progressive Die?
Progressive Die View
Why Progressive Die Matters?
High Precision
Maintain tight dimensional tolerances
Improve insulation reliability
Low Burr
Long Tool Life
Material Utilization
Excellent Repeatability
Stable long-term production
Reduce material waste
Consistent quality
High Productivity
Continuous manufacturing
Progressive dies enable high-speed, consistent stamping with precise lamination geometry, low burrs, reduced material waste, and stable production quality.
Progressive Die Manufacturing Process
Customer Drawing Review
Die Design
Precision Machining
Component Inspection
Die Assembly
Trial Stamping
Lamination Inspection
Final Approval
Analyze lamination geometry, tolerances, material, and production requirements.
Develop the progressive die structure, strip layout, and stamping sequence.
CNC machining, wire EDM, and grinding for critical die components.
Verify dimensions, profiles, clearances, and surface quality.
Assemble and align punches, dies, guides, and other components.
Test the tooling and produce initial motor laminations.
Check dimensions, slot geometry, burr height, and overall stamping quality.
Optimize the tooling and approve it for stable mass production.
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Design Considerations
Material Selection
Select suitable electrical steel grades and lamination thickness based on magnetic performance, core loss requirements, stamping characteristics, and motor design.
Part Geometry
Optimize slot shape, tooth geometry, inner and outer diameters, and critical tolerances to ensure accurate lamination profiles and consistent motor core performance.
Strip Layout & Material Utilization
Design an efficient strip layout to minimize material waste while maintaining sufficient support and stability during high-speed progressive stamping.
Stamping Sequence
Define a controlled sequence for punching, notching, pilot positioning, and final separation to maintain dimensional accuracy and minimize deformation.
Burr Control
Consider material properties, clearance, cutting conditions, and tool geometry to control burr height and maintain clean lamination edges.
Tooling Life
Use appropriate die materials, surface treatments, precision machining, and optimized clearances to improve wear resistance and extend progressive die service life.
Progressive die design balances precision, material efficiency, tool life, and production stability to ensure consistent motor laminations for high-volume manufacturing.
Integrate stacking, interlocking, or other core assembly features into the die design when required to support efficient and consistent motor core production.
Design the progressive die for reliable high-speed operation, repeatable positioning, easy maintenance, and stable long-term mass production.
Automatic Stacking
Production Stability
Tool Manufacturing Equipment
CNC Machining Center
Wire EDM Machines
Our advanced tooling equipment ensures precise machining, accurate assembly, reliable inspection, and stable progressive die performance.
Surface Grinding Machines
CNC Milling Machines
CNC Turning Machines
Coordinate Measuring Machines (CMM)
Optical Inspection Systems
Laser Marking Equipment
Die Assembly Equipment
Trial Stamping Presses
Die Inspection & Validation
Dimensional Measurement
Verify critical die dimensions and tolerances against the tooling design.
Trial Stamping
Run initial stamping trials to evaluate die performance and lamination quality.
First Article Inspection (FAI)
Inspect the first stamped laminations to confirm all critical specifications.
Burr Height Measurement
Measure and control burr height to ensure clean and consistent stamping.
Tool Adjustment
Fine-tune die clearance, alignment, and critical components based on inspection results.
Sample Approval
Confirm sample quality and approve the tooling for stable mass production.
Our die inspection process combines dimensional measurement, trial stamping, FAI, burr control, tool adjustment, and sample approval to ensure production-ready tooling.
Scenarios supported by Progressive Die
EV Motor Laminations
Precision dies for high-efficiency electric vehicle motors.
BLDC Motor Laminations
Accurate tooling for compact and high-speed BLDC motors.
Servo Motor Laminations
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Industrial Motor Laminations
Generator Laminations
eMobility Motor Laminations
Reliable tooling for pumps, fans, compressors, and automation motors.
Custom tooling for electric motorcycles, e-bikes, scooters, and other electric drive systems.
Precision dies for stator and rotor laminations in power generation equipment.
High-precision dies for servo and motion control motors.
Our progressive dies support precision motor laminations for EV, BLDC, servo, industrial, generator, and eMobility applications.
Advantages
Experienced Engineering Team
Precision Tool Manufacturing
High Production Efficiency
Stable Long-Term Performance
Optimized Material Utilization
OEM Tool Development
99+
9
Years of experience
Happy clients
Frequently Asked Questions
What is a progressive die?
A progressive die is a multi-stage stamping tool that performs several operations in sequence as electrical steel strip moves through the die. It enables high-speed, precise, and consistent production of motor laminations with controlled dimensions and burr height.
How is it different from a compound die?
A progressive die performs multiple stamping operations sequentially as the material moves through different stations, making it ideal for high-volume production. A compound die performs multiple cutting operations simultaneously in one station, offering high accuracy but generally with less flexibility for complex multi-stage processes.
Can you design dies according to customer drawings?
Yes. We can design and manufacture custom progressive dies based on customer drawings, 2D/3D CAD files, material specifications, tolerances, and production requirements. We also support trial stamping, first article inspection, tool adjustment, and final approval before mass production.
What materials can be processed?
We primarily process non-oriented electrical steel (NGO) for motor laminations, with various grades and thicknesses available. We can also process other suitable electrical steel materials according to the motor design, magnetic performance requirements, and customer specifications.
How long does tooling development take?
Typical progressive die development takes 3–4 weeks, depending on lamination complexity, die structure, material thickness, dimensional tolerances, and production requirements. A detailed schedule can be provided after reviewing the customer’s drawings and specifications.
Do you provide prototype tooling?
Yes. We provide prototype and trial tooling for new motor lamination designs, allowing customers to verify dimensions, slot geometry, burr height, and stamping performance before full-scale production tooling.