Reenives: Honest Motor Stator Lamination and Stamping Supplier
Motor Stator Lamination and Stamping – Precision Cores for High-Efficiency BLDC Motors
Inconsistent stator quality? Hidden material defects? Overpaying for unreliable stamping? Motor stator lamination and stamping is the foundational process that determines every BLDC motor's efficiency, torque, and thermal performance. Reenives delivers honest, transparent, and precision-engineered stator laminations with 0.2mm ultra-thin silicon steel, burr height < 0.03mm, and epoxy coating—reducing iron loss by up to 30% while eliminating hidden quality compromises.
- • What Is Motor Stator Lamination and Stamping?
- • Classification of Stator Laminations and Stampings
- • Technical Specifications & Verified Data
- • Applications Across Drone, EV, Robotics & Industrial Systems
- • 6-Step Engineering Selection Guide for Stator Laminations
- • FAQ: Stator Lamination and Stamping Technical Questions
- • Why Reenives – The Honest Motor Stator Lamination and Stamping Supplier
- • Dongguan Runlu Motor Technology Co., Ltd.
What Is Motor Stator Lamination and Stamping?
Motor stator lamination and stamping is the precision manufacturing process of punching thin electrical steel sheets into the shaped laminations that form the stationary magnetic core of a BLDC motor. The stator core is made up of stacked laminations—each stamped from silicon steel—that together create the magnetic circuit essential for electromagnetic energy conversion.
Why laminations matter: A solid iron stator would generate massive eddy current losses under alternating magnetic fields. By using thin laminated sheets (0.10–0.35mm), the electrical resistance increases, eddy current flow is restricted, and core loss is dramatically reduced. Adding silicon to the steel further boosts electrical resistivity and magnetic permeability while reducing hysteresis loss.
ⓘ "Honest" means: No material substitution without notice. No hidden tolerances. Full transparency on material certificates, iron loss data, and dimensional reports. Reenives delivers exactly what we promise—every batch, every shipment.
Reenives manufactures precision stator laminations using imported progressive stamping dies and automated epoxy powder coating lines. Every lamination meets IEC 60404-2 standards with third-party verification.
Classification of Stator Laminations and Stampings
Reenives supplies stator laminations across four primary series, tailored to different motor classes and operating conditions:
| Series | Material / Thickness | Slot/Pole Configurations | Primary Application |
|---|---|---|---|
| Series A – Ultra-thin High-Speed | 0.10–0.20mm 35PN210 | 9N12P, 12N14P | Drone motors, FPV racing, high-RPM UAV (>30,000 RPM) |
| Series B – Standard Industrial | 0.35mm 50A470 | 12N8P, 24N16P | Pumps, compressors, actuators, servos |
| Series C – Automotive Grade | 0.25mm 35PN250 | Custom geometries | EV coolant pumps, EGR valves, HVAC actuators |
| Series D – Custom OEM Stampings | 0.10–0.35mm (any grade) | Any slot/pole combination | Specialized UAV frames, robotics, bespoke motor designs |
Stator laminations are also categorized by outer diameter for platform compatibility:
- Micro laminations (OD 12–30mm): Micro drones, tiny whoops, sub-20g UAV motors
- Compact laminations (OD 30–50mm): 3–5 inch FPV drones, gimbals, handheld tools
- Mid-size laminations (OD 50–80mm): Heavy-lift drones, eVTOL, robotics, automotive BLDC
Technical Specifications & Verified Data
All performance data below is derived from Reenives in-house laboratory testing (IEC 60404-2), third-party validation (CMQIC), and peer-reviewed BLDC motor research.
| Parameter | Value / Range (Reenives Standard) | Test Standard / Source |
|---|---|---|
| Material Grade | 35PN210, 35PN250, 50A470, 50A600 (Nippon Steel / Baowu origin) | Material certificates |
| Lamination Thickness | 0.10mm / 0.15mm / 0.20mm / 0.35mm (customizable) | Micrometer / IEC 60404-2 |
| Iron Loss @ 1.0T, 400Hz | ≤ 8.5 W/kg (0.20mm) — 30% lower than 0.35mm | IEC 60404-2 / CMQIC Report |
| Saturation Flux Density Bs | 1.68 – 1.72 T | Epstein frame test |
| Burr Height (max) | < 0.03mm (progressive stamping die) | Optical measurement |
| Epoxy Coating Thickness | 30–60 µm, dielectric strength > 2.5 kV | ASTM D149 |
| Stacking Factor | ≥ 97.5% (interlock or welding) | Weight method |
| Concentricity Tolerance | ±0.01mm – ±0.015mm | CMM measurement |
| Dimensional Tolerance (OD) | ±0.015mm (precision die) | CMM / optical comparator |
| Operating Temperature | -40°C to +180°C (Class H insulation) | Thermal chamber testing |
| Torque Ripple (with optimized stamping) | ≤ 1.5% | FEM simulation / IEEE Xplore |
🔬 Data Source: Reenives R&D Report 2024-Q4 + CMQIC Test Report + IEC 60404-2 standard + IEEE Xplore BLDC motor studies.
Applications Across Drone, EV, Robotics & Industrial Systems
Motor stator lamination and stamping technology powers a wide range of modern electrification applications:
| Industry / Application | Specific Use Cases | Stamping Requirements |
|---|---|---|
| Drone & UAV Propulsion | FPV racing, logistics drones, eVTOL, agriculture UAVs | Ultra-thin (0.10–0.20mm), low iron loss, <0.03mm burr |
| Automotive BLDC | Electric coolant pumps, EGR valves, HVAC actuators | Thermal stability, high reliability, corrosion-resistant epoxy coating |
| Robotics & Servo Systems | Collaborative robot joints, precision actuators | Smooth torque ripple ≤ 1.5%, precision concentricity ±0.01mm |
| Medical Instruments | Ventilator blowers, surgical tools, drug delivery pumps | Ultra-clean burr-free stampings, low vibration, Class H insulation |
| Industrial Motor-Pumps | BLDC motor-pump systems (1HP, 48V designs) | Efficiency ≥ 94%, stable torque, high stacking factor |
| RC Models & E-Bikes | RC cars, RC boats, electrical bicycles | Compact form factor, high power density, lightweight |
“BLDC motors with precision stator laminations have become the preferred choice due to their superior efficiency, low maintenance, and ability to perform reliably across a wide range of operational demands.”
6-Step Engineering Selection Guide for Stator Laminations
For procurement engineers and motor designers, selecting the optimal motor stator lamination and stamping solution requires systematic evaluation. Here is a practical 6-step framework:
- Define Motor Class & Power Requirements – Determine horsepower, voltage, and RPM:
- Micro BLDC (<100W): Micro drones, tiny actuators
- Standard BLDC (100W–1HP): FPV drones, gimbals, pumps
- High-power BLDC (>1HP): Heavy-lift UAVs, eVTOL, EVs
- Select Lamination Thickness – Thinner laminations reduce eddy current loss at high frequencies:
- 0.10mm: Ultra-high-speed (>50,000 RPM), aerospace-grade
- 0.15–0.20mm: High-performance drone motors – optimal efficiency balance
- 0.35mm: Cost-sensitive industrial applications with lower RPM
ⓘ “Using 0.2mm silicon steel reduces iron loss by approximately 30% compared to 0.35mm material.”
- Evaluate Material Grade & Magnetic Properties – Higher silicon content improves permeability:
- 35PN210 / 35PN250: Premium high-frequency performance (P1.0/400 ≤ 8.5 W/kg)
- 50A470 / 50A600: Cost-effective general industrial use
- Verify material certificates and origin (Nippon Steel / Baowu)
- Specify Insulation Coating – Critical for electrical insulation and durability:
- Epoxy powder coating (30–60µm, Class H 180°C)
- Dielectric strength > 2.5 kV for reliable insulation breakdown protection
- Corrosion resistance for high-humidity UAV operations
- Verify Stamping Precision & Quality Control – Non-negotiable for motor reliability:
- Burr height < 0.03mm – protects winding insulation from damage
- Concentricity ±0.01mm – reduces vibration, noise, and bearing wear
- Stacking factor ≥ 97.5% – maximizes active material utilization
- Dimensional tolerance OD ±0.015mm – ensures proper motor assembly
- Choose a Transparent, Honest Supplier – Beyond capability, evaluate integrity:
- Full material certificates with every batch (no substitutions)
- Third-party test reports (CMQIC, SGS, IEC compliance)
- Clear communication on tolerances, lead times, and costs
- Progressive stamping die capability for high-volume production
- Private mould development for unique designs
- Dust-free workshops and complete export documentation
FAQ: Stator Lamination and Stamping Technical Questions
Motor stator lamination and stamping is the precision manufacturing process of punching thin electrical steel sheets into shaped laminations that form the stator core of BLDC motors. The process uses progressive stamping dies to create laminations with specific slot/pole geometries, then stacks and bonds them to form the complete stator core. Stamping precision directly affects motor efficiency, torque, and thermal performance.
Silicon steel (electrical steel) contains 2–3.5% silicon, which: (1) increases electrical resistance to minimize eddy currents, (2) improves magnetic permeability for better flux conduction, and (3) reduces hysteresis loss during magnetization cycles. Regular carbon steel has significantly higher core loss and lower permeability, making it unsuitable for high-efficiency BLDC motors. Silicon steel is essential for achieving iron loss ≤ 8.5 W/kg at 400Hz in drone-grade motors.
Thinner laminations reduce the cross-sectional area of each electrical steel sheet, which increases electrical resistance and minimizes eddy current flow. For drone and high-speed BLDC motors, 0.10–0.20mm laminations achieve iron loss ≤ 8.5 W/kg at 400Hz—approximately 30% lower than conventional 0.35mm material. This translates to cooler motor operation, higher efficiency, and extended flight/operation times. 0.35mm is suitable for lower-RPM industrial applications where cost is prioritized over peak efficiency.
Burr height is the raised edge left on stamped metal after the punching process. In stator laminations, burr height must be maintained below 0.03mm because excessive burrs can: (1) damage enamel insulation on copper windings during assembly causing shorts, (2) increase iron loss through localized magnetic saturation, and (3) reduce motor reliability and lifespan. Reenives maintains burr height < 0.03mm through precision progressive stamping dies with regular die maintenance.
Epoxy powder coating provides three critical functions: (1) electrical insulation between laminations to minimize eddy currents and prevent interlaminar shorts, (2) corrosion resistance for operation in humid environments (outdoor UAVs, marine applications), and (3) thermal durability up to 180°C (Class H). The coating thickness (30–60µm) is optimized for tight slot geometries common in Micro BLDC Motors, with dielectric strength exceeding 2.5 kV.
Stacking factor is the ratio of actual steel volume to the total stack volume. A higher stacking factor (≥ 97.5%) means more active magnetic material in the core, which increases magnetic flux density and torque output for a given stack height. Lower stacking factor indicates excessive air gaps or coating thickness, reducing efficiency and power density. Reenives achieves ≥ 97.5% stacking factor through precision interlock or welding assembly processes.
An honest stator lamination supplier provides: (1) full material certificates and origin documentation (no grade substitutions), (2) transparent third-party test reports (CMQIC, SGS, IEC compliance), (3) clear communication on tolerances, lead times, and costs without hidden fees, (4) consistent quality across all batches with no compromises, and (5) responsive customer service that addresses technical concerns directly. Reenives is committed to transparency in every aspect of stator lamination supply.
Yes. Reenives supports full customization of stator laminations including: lamination thickness (0.10–0.35mm), material grade (35PN210, 35PN250, 50A470, etc.), outer diameter (12–80mm), slot/pole combinations (9N12P, 12N14P, 24N22P, etc.), stacking height, and epoxy coating specifications. Private mould development is available for high-volume OEM projects with exclusive design rights.
Why Reenives – The Honest Motor Stator Lamination and Stamping Supplier
Reenives has earned its reputation as an Honest Motor Stator Lamination and Stamping Supplier by combining advanced manufacturing technology with uncompromising transparency and integrity.
Our Advantages — Built on Honesty & Precision
- ✅ Ultra-Thin Silicon Steel: 0.10mm–0.20mm laminations reduce iron loss by up to 30% compared to 0.35mm steel—longer flight times, cooler motors, higher efficiency
- ✅ Precision Progressive Stamping: Burr height < 0.03mm, concentricity ±0.01mm, stacking factor ≥ 97.5%, OD tolerance ±0.015mm
- ✅ Full Customization: Private mould development, tailored slot/pole combinations, epoxy coating options, and custom stack heights
- ✅ Transparent Quality Control: IEC 60404-2 testing, CMQIC third-party verification, SGS inspection, and material certificates for every shipment—no hidden substitutions
- ✅ Global Export Capability: Complete export qualifications with worldwide shipping to OEMs and motor manufacturers across 40+ countries
- ✅ Honest Pricing & Communication: Clear quotes, no hidden fees, responsive technical support, and on-time delivery commitment
🤝 Our promise: What we quote is what you get. Full material traceability, third-verified performance data, and a partnership built on trust.
⚙️ Ready to source honest, precision stator laminations for your BLDC motors?
Contact Reenives today for engineering consultation, OEM samples, and transparent bulk pricing.
📱 WhatsApp: +86-13377741885
Dongguan Runlu Motor Technology Co., Ltd.
Reenives — Professional Drone Stator Core Manufacturer
Founded in 2022, Reenives has rapidly grown into a trusted supplier of motor stator laminations and stampings for the global UAV, robotics, EV, and industrial motor markets.
Independent R&D Technology · Imported stamping & epoxy powder coating production lines · Dust-free workshops · 4 years of manufacturing experience · Solved stator core challenges for 1,000+ enterprises worldwide.
From production to sales, we support bulk purchasing, private mould development, and sample making. We provide tailor-made solutions for your specific production and usage scenarios—with full transparency on materials, tolerances, and costs.
🌐 www.reenives-bldcmotor.com | 📧 linda_reenives@163.com | 📱 +86-13377741885
✈️ Global customers welcome — consult, visit the factory, or request free samples today!
Reenives — Honest Motor Stator Lamination and Stamping Supplier
© 2026 Dongguan Runlu Motor Technology Co., Ltd. All rights reserved.
Reenives: Trusted Drone Generator Stator Laminations Supplier
Reenives: Global Leading High Torque Brushless DC Motor Stator Supplier
Related Article
