Reenives: Global Leading Drone Motor Stator Lamination Sheet Supplier
Lamination Sheet: Precision Silicon Steel Core for Drone, UAV & High-Performance BLDC Motors
1. What is a Lamination Sheet? (The Foundation of Every BLDC Stator Core)
A lamination sheet (also called electrical steel sheet or stator lamination) is a thin, precision-stamped piece of silicon steel that forms the building block of a motor stator core. Multiple lamination sheets are stacked and bonded to create the stator core of a brushless DC motor. The lamination sheet's thickness, material grade, and insulation coating directly determine eddy current losses, magnetic flux density, and thermal performance of the motor .
Reenives manufactures high-quality lamination sheets using non-grain oriented (NGO) electrical steel with advanced epoxy powder coating — achieving iron loss ≤8.2 W/kg @400Hz/1.0T and dimensional tolerance ±0.02mm, critical for high-efficiency drone propulsion systems .
2. Lamination Sheet Classifications
Reenives offers lamination sheets in multiple configurations to meet diverse application requirements :
- By Thickness: 0.15mm (ultra-high RPM racing), 0.20mm (standard high-frequency UAV/FPV), 0.27mm, 0.35mm, and 0.50mm (industrial BLDC) .
- By Material Grade: 20WTG1500 (P1.0/400 ≤8.2 W/kg), 35PN210, 50WW470, and premium JFE supercore for aerospace applications .
- By Insulation Coating: C3 organic, C5 epoxy powder coating (Class H, 180°C) with ≥1800V dielectric, and self-bonding coatings .
- By Slot/Pole Geometry: 12N14P (most common for UAVs), 9N12P (racing), 18N20P (heavy-lift), 24N28P (eVTOL) .
💡 Reenives specialty: private mould development for any custom lamination sheet geometry — with progressive die stamping ensuring ±0.02mm tolerance .
3. Technical Specifications & Verified Performance Data
All parameters validated by Reenives R&D center (ISO 9001:2025) and third-party testing per IEC 60404-2, ASTM A937. Critical for drone motor lamination sheet selection .
| Parameter | Value / Range | Test Standard / Source |
|---|---|---|
| Lamination Thickness | 0.15mm / 0.20mm / 0.27mm / 0.35mm / 0.50mm (±0.005mm) | Micrometer / SPC control |
| Iron Loss @400Hz/1.0T (0.20mm) | ≤ 8.2 W/kg | Epstein frame (IEC 60404-2) |
| Iron Loss @400Hz/1.0T (0.35mm) | ≤ 13.8 W/kg | Epstein frame (IEC 60404-2) |
| Magnetic Flux Density B50 | 1.68T – 1.74T | ASTM A341 |
| Dimensional Tolerance | ± 0.02mm | Vision measurement |
| Epoxy Coating Dielectric | >1800V, Class H (180°C) | ASTM D149 / IEC 60085 |
| Stacking Factor (Bonded) | ≥ 97.5% | Weight / Dimension method |
📐 Data source: Reenives quality assurance lab, 2025–2026. CMQIC Test Report #MQ-25-112 . Full batch traceability and material certificates available.
4. Applications – Drone, UAV & Industrial BLDC Motors
Reenives lamination sheets power critical applications across multiple sectors :
- FPV Racing & Cinematic Drones: 2207, 2306, 2507 lamination sheets with 92% peak efficiency at 45,000 RPM .
- Commercial UAVs & eVTOL: 12N14P / 18N20P lamination sheets for 15-30kg payload with extended flight endurance .
- Agricultural Spraying Drones: High-torque lamination sheets with C5 epoxy coating offering 500h+ salt spray resistance .
- Robotics & Servo Motors: Low cogging torque (<1% ripple) for precision motion control .
- Industrial BLDC Actuators: E-scooters, e-bikes, power tools, and HVAC systems .
5. 5-Step Engineering Selection Guide for Lamination Sheets
- Define target motor speed and efficiency: For <10,000 RPM use 0.35–0.50mm; for >30,000 RPM use ≤0.20mm lamination sheets .
- Choose material grade and thickness: 0.20mm 20WTG1500 for high-frequency UAV (40-80kHz PWM) / 0.35mm for robust industrial motors .
- Select insulation coating type: C5 epoxy coating for outdoor UAVs; self-bonding coating for ultra-compact designs .
- Specify slot/pole geometry: 12N14P for balanced torque/speed (most common for UAVs) .
- Request samples and validation: Reenives delivers first-article inspection reports (FAI) and material certificates. Prototype lamination sheet samples ready in 7-10 days .
💡 Engineering support: Free DFM within 48h and electromagnetic simulation (Maxwell) to validate lamination sheet design before tooling — send your motor spec or drawing to linda_reenives@163.com .
6. FAQ – Critical Lamination Sheet Technical Pain Points
Reenives recommends 0.20mm lamination sheets (20WTG1500 grade) for drone motors operating above 30,000 RPM. At 400Hz/1.0T, core loss is ≤8.2 W/kg — reducing eddy current loss by 35-40% compared to 0.35mm laminations. For extreme racing above 50,000 RPM, 0.15mm ultra-thin sheets are available .
Standard materials: 20WTG1500 (0.20mm, P1.0/400 ≤8.2 W/kg), 35PN210 (0.35mm, ≤12 W/kg), and 50WW470 for industrial motors. Premium JFE supercore (0.15mm) available for ultra-high-efficiency UAVs and aerospace applications. All materials sourced from Baowu / Nippon Steel with full COA .
Our C5 epoxy powder coating provides a uniform 15-30µm layer with >1800V dielectric strength, preventing inter-lamination shorts and moisture ingress. Passes 500h salt spray test (ASTM B117) and thermal cycling (-40°C to 180°C) — critical for agricultural and maritime drone reliability .
Yes — we specialize in custom progressive dies for any lamination sheet geometry. Minimum order quantity for private mould is negotiable, and sample laminations can be delivered within 4 weeks after tooling approval .
Prototype orders: as low as 50 pieces, lead time 10-12 days with 100% inspection. Private mould tooling: 15-20 days for mass production volumes. Global shipping with full export documentation (DDP/FCA/EXW) to US, EU, and Asia .
7. Summary & Call to Action – Power Your Next-Generation Drone Motor
🚀 Ready to Optimize Your Lamination Sheet Selection?
Reenives delivers precision lamination sheets with 0.20mm epoxy-coated silicon steel, ≤8.2 W/kg core loss, and proven field performance. From FPV racing to heavy-lift UAVs, we are your strategic lamination sheet partner .
📦 Request Free Lamination Sheet Samples & Quote
📧 linda_reenives@163.com | 💬 WhatsApp: +86-13377741885
Global shipping with full export documentation. Virtual factory tour & sample service available. Prototype lamination sheet samples ready in 7 days .
8. Dongguan Runlu Motor Technology Co., Ltd.
Reenives — Global Leading Drone Motor Stator Lamination Sheet Supplier | UAV, Drone & Industrial Motor Core Specialist
Dongguan Runlu Motor Technology Co., Ltd. | www.reenives-bldcmotor.com | WhatsApp: +86-13377741885
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