An outrunner brushless motor stator is the stationary laminated core of an outrunner BLDC 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 them ideal for drone direct-drive systems .

Reenives manufactures high-quality outrunner brushless stator cores using non-grain oriented silicon steel (0.10mm/0.20mm/0.35mm) with advanced C5 epoxy powder coating — ensuring low core loss (≤8.2 W/kg @400Hz) and high thermal stability for sustained drone operation .

Reenives offers outrunner brushless stator cores in multiple configurations to meet diverse application requirements :

• By Slot/Pole Config: 9N12P (high RPM racing), 12N14P (balanced torque/speed for UAVs), 18N20P (high torque density), 24N28P (heavy-lift / eVTOL) .
• By Material Thickness: 0.10mm (ultra-high performance, Japanese-grade), 0.15mm (ultra-high RPM >50,000), 0.20mm (standard high-frequency UAV), 0.27mm, and 0.35mm (general industrial) .
• By Insulation Coating: C5/C7 epoxy powder coating (Class H, 180°C) with >4000V dielectric strength .
• By Stacking Method: Interlocking self-bonding, laser welding, or epoxy bonding .

💡 Reenives specialty: private mould development for custom 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 .

📐 Data source: Reenives in-house quality lab, 2025–2026. SGS verification report #GZ102505. Full batch traceability and material certificates available .

Reenives outrunner brushless stator cores power critical applications across multiple sectors :

• FPV Racing & Cinematic Drones: 2207, 2306, 2507 outrunner stators with high torque density and instant throttle response .
• Commercial UAVs & eVTOL: 12N14P / 18N20P outrunner stators for 15-30kg payload with extended flight endurance .
• Agricultural Spraying Drones: High-torque outrunner stators with C5 epoxy coating offering 500h+ salt spray resistance .
• Industrial BLDC Actuators & Servos: Low-cogging outrunner cores for smooth torque in robotics and automation .
• Fixed-Wing UAVs: Outrunner motors for high-thrust, low-RPM propulsion applications .

1. Define power, torque, and speed requirements: For FPV racing (>40,000 RPM), select 0.10-0.20mm laminations. For heavy-lift UAVs (15,000-25,000 RPM), 0.20mm is optimal .
2. Choose lamination material thickness: 0.10mm for premium Japanese-grade performance; 0.15mm for ultra-high RPM >50,000; 0.20mm for standard high-frequency UAV; 0.35mm for robust industrial motors .
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/C7 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 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.