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✈️ Engineering pain point: High iron loss → motor overheating → reduced flight time & thrust instability? The stator core accounts for >35% of total motor losses. Reenives delivers ultra-low core loss laminations (0.20mm / 0.35mm) with epoxy coating, designed for high-frequency drone propulsion. Trusted by UAV OEMs, now with dedicated logistics to Russia – get custom stator stacks that boost torque density by up to 18%.

📑 Article navigation – engineer focus
🔍 Stator Core Definition 🧲 Classification for BLDC 📊 Technical Specs & Data 🚁 Drone / UAV / FPV applications ⚙️ 6-Step Selection Guide ❓ FAQ (Core loss, coating, Russia logistics) 📞 Summary + CTA 🏭 Company Profile (EEAT)

A stator core is the stationary laminated magnetic circuit in a brushless DC (BLDC) motor, composed of stacked non-oriented silicon steel sheets. For drone, UAV and FPV propulsion systems, the stator core directly determines electromagnetic efficiency, heat dissipation, and power-to-weight ratio. Each lamination is electrically insulated to suppress eddy currents. Reenives manufactures stator cores using high-permeability M330-35A / 35WW270 steel with advanced stamping and C5 epoxy insulation.

• 🔹 Concentrated winding stator core – High slot fill factor (>85%), short end turns; ideal for 12N14P FPV drone motors.
• 🔹 Distributed winding stator core – Lower cogging torque, preferred for gimbal / surveillance UAVs.
• 🔹 Segmented (split) stator core – Simplified coil insertion, mass production ready for racing drone motors.
• 🔹 High-frequency ultra-thin stator core – 0.20mm laminations, optimized for 40-80kHz PWM controllers, reduces excess heat.

Reenives supplies all types with custom die tooling for stator OD from 18mm to 120mm, meeting both micro FPV and heavy-lift UAV requirements.

Data source: Reenives internal test lab & SGS verification report #SGS-RL-2421 (2025). All values are batch-audited for stator core quality.

Parameter	Value / Range	Performance impact (Drone motor)
Material grade	M330-35A, 35WW250, 0.20mm ultra-thin	Lower eddy current loss → longer flight endurance
Lamination thickness	0.20mm / 0.27mm / 0.35mm (±0.005mm)	0.20mm reduces high-frequency loss by ~28% vs 0.35mm
Core loss (W/kg) @1.0T, 400Hz	≤12.5 (0.35mm) / ≤8.2 (0.20mm)	Directly improves propulsion efficiency
Magnetic flux density B50 (T)	1.68 – 1.73 T	Higher torque per ampere for aggressive throttle
Stacking factor	≥97% (interlocking / laser welding)	Maximizes active magnetic area
Insulation coating	C5 epoxy (both sides), 0.5-2.5μm	Withstands 180°C, prevents inter-lamination shorts
Burr height max	≤0.02mm	Eliminates winding insulation damage
Slot fill factor (typical)	≥87% (automated needle winding)	Higher power density for compact UAV motors

✔️ All stator cores 100% tested for core loss (Epstein frame) and dimensional conformity. PPAP level 3 available.

Reenives stator cores are engineered for extreme power density and thermal stability, used in:

• ⚡ FPV racing drones – 22xx/23xx/28xx series, 0.20mm laminations to handle 50A peaks without magnetic saturation.
• 🛸 Agricultural spraying UAVs – 80mm stator OD, high torque at low RPM for heavy payloads (10-20L).
• 📡 Surveillance & reconnaissance drones – low cogging torque, smooth hover performance.
• 🏭 Industrial BLDC servos & eVTOL prototypes – custom slot/pole combinations.

1. Define stator OD & stack height – e.g., drone size 2207 → OD 22mm, stack 7mm.
2. Select lamination thickness – 0.20mm for high-RPM FPV (>50kHz PWM), 0.35mm for cost-effective industrial drones.
3. Specify slot/pole combination – 12N14P (best torque ripple) or 9N12P (lighter).
4. Choose insulation & coating – C3 organic varnish or C5 epoxy for high humidity / Russia climate.
5. Define burr & flatness tolerance – max burr ≤0.02mm guarantees winding reliability.
6. Request prototype samples – Reenives provides 5-10 free stator core samples + magnetic test report.

🔧 Need technical drawing review? Our engineers support STEP/IGS within 24h – direct support for Russian customers via English/Russian.

✅ Low core loss + high torque density = superior flight performance

Reenives combines precision stamping, epoxy coating, and strict magnetic testing. From 100 pcs prototypes to 100k+ mass production – we support your UAV motor project with free samples for qualified engineers.

📧 Email: linda_reenives@163.com  |  📞 WhatsApp: +86-13377741885

🌐 Official Website: www.reenives-bldcmotor.com

📦 Get custom quote + free sample → Contact stator core engineering team

Reenives – Professional Drone Stator Core Manufacturer

Reenives is a professional drone stator core and motor lamination manufacturer, founded in 2022. It boasts independent research and development technologies, imported stamping & epoxy powder coating equipment production lines plus dust-free production workshops, more than 100 R&D patents, 3 production bases, a factory area of over 50,000 square meters, and a staff size of more than 500. From production to sales, we support bulk purchasing, private mould development, and samples making, and can provide tailor-made perfect solutions for your production and usage scenarios. With 4 years of manufacturing experience, we have solved the production problems related to the use of stator core in industrial production for more than 1000 enterprises. We can ship globally (with complete export qualifications including EAC for Russia). Global customers are welcome to consult, visit the factory, and obtain free samples!

✔️ Certifications: ISO 9001:2024, IATF 16949 (in progress), RoHS, REACH. Direct support for Russian buyers – technical datasheets in English/Russian.