A BLDC outrunner stator core is the stationary laminated core of an outrunner brushless DC motor—a design where the permanent magnet rotor rotates outside the stator electromagnets. The stator is fixed to the motor shaft, while the rotor spins around it. This external-rotor configuration allows the motor to contain more magnetic poles of greater strength than would be possible if the magnets had to be arranged on a smaller diameter inner space, making outrunner cores ideal for drone direct-drive systems.

Reenives manufactures high-quality BLDC outrunner stator cores using non-grain oriented silicon steel (0.15-0.35mm) with advanced C5/C6 epoxy powder coating — ensuring low core loss, high thermal stability, and minimal cogging torque for precision drone operation.

Reenives offers BLDC outrunner stator cores in multiple configurations to meet diverse drone and UAV application requirements:

• By Slot/Pole Config: 9N12P (high RPM racing), 12N14P (balanced torque/speed for UAVs, DLRK), 18N20P (high torque density), 24N28P (heavy-lift / eVTOL).
• By Material Thickness: 0.15mm (ultra-high performance FPV, 6S), 0.20mm (standard high-frequency UAV), 0.27mm (aerial photography), and 0.35mm (heavy-lift industrial).
• By Core Architecture: Segmented stator cores (modular for easy winding, ideal for 5-7 inch FPV racing) and integrated circular laminated stacks (one-piece for heavy-lift agricultural drones).
• By Insulation Coating: C5 epoxy powder coating (Class H, 180°C) with >2000V dielectric strength; C6 grade for superior thermal conductivity and corrosion resistance.
• By Stacking Method: Interlocking self-bonding (≥0.27mm), laser welding, or epoxy bonding (ultra-thin laminations below 0.25mm).

💡 Reenives specialty: private mould development for custom BLDC outrunner stator geometries — including skew designs that reduce cogging torque by 30-50% for smoother drone operation.

All parameters validated by Reenives R&D center (ISO 9001:2025 certified) and third-party testing per IEC 60404-2. Independent testing on drone motors with Reenives stator cores shows 12% higher torque density and 9°C lower winding temperature after 10-min hover compared to industry standard cores.

📐 Data source: Reenives in-house quality lab, 2025–2026. SGS verification report available. Full batch traceability and material certificates.

Reenives BLDC outrunner stator cores power critical UAV applications across multiple sectors:

• FPV Racing & Cinematic Drones: 2207, 2306, 2507 outrunner stators with 0.15-0.20mm laminations for 45,000+ RPM and 92%+ peak efficiency.
• Commercial UAVs & eVTOL: 12N14P / 18N20P outrunner stators for 15-30kg payload with extended flight endurance.
• Agricultural Spraying Drones: High-torque outrunner stators with C5/C6 epoxy coating offering 500h+ salt spray resistance.
• Robotic Joint Actuators: Low-cogging outrunner cores for smooth torque in collaborative robot arms and servo modules.
• Fixed-Wing UAVs: Outrunner stators for high-thrust, efficient propulsion applications.

1. Define power, torque, and speed requirements: For FPV racing (>40,000 RPM), select 0.15-0.20mm laminations. For heavy-lift UAVs (15,000-25,000 RPM), 0.20mm is optimal.
2. Choose lamination material thickness: 0.15mm for premium ultra-high-speed FPV performance; 0.20mm for standard high-frequency UAV; 0.35mm for robust industrial drone applications.
3. Select slot/pole combination: 9N12P for high RPM racing, 12N14P for balanced torque/speed (most common for UAVs), 18N20P for high torque density.
4. Specify insulation and environmental protection: C5/C6 epoxy coating for outdoor UAVs; oil-compatible coating for EV/hybrid applications.
5. Request samples and validation: Reenives delivers first-article inspection reports (FAI) and material certificates. Prototype BLDC outrunner stator samples ready in 7-10 days after design approval.

💡 Engineering support: Free DFM within 48h — send your motor spec or drawing to linda_reenives@163.com.