A brushless DC outrunner motor is a BLDC motor design where the rotor (with permanent magnets) rotates around the outside of the stator core. Unlike inrunner motors, the stator is stationary in the center, and the rotor spins externally — delivering higher torque density and smoother low-speed operation, ideal for UAV propellers, e-bikes, and robotics .

Reenives manufactures high-quality brushless DC outrunner motor stator cores using non-grain oriented electrical steel (0.20mm/0.35mm) with advanced epoxy powder coating — reducing eddy current losses by up to 38% compared to conventional varnish insulation .

Reenives offers outrunner motor 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: 0.20mm (high-frequency outrunner UAV) and 0.35mm (general industrial).
• By Insulation Coating: Epoxy powder coating (Class H, 180°C–200°C) with ≥1800V dielectric strength .
• By Stacking Method: Interlocking self-bonding, laser welding, or epoxy bonding for high structural integrity .

💡 Reenives specialty: private mould development for any custom outrunner stator geometry — optimized for high torque and thermal dissipation .

All parameters validated by Reenives R&D center (ISO 9001:2025 certified) and third-party testing per IEC 60404-2, SAE J2360, and ASTM A912. Critical for outrunner motor designers .

📐 Data source: Reenives quality assurance lab, 2025–2026. Full batch traceability and test certificates available.

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

• FPV Racing & Cinematic Drones: 2207, 2306, 2507 outrunner stators with instant throttle response .
• Commercial UAVs & eVTOL: 12N14P / 18N20P outrunner stators for 15-30kg payload .
• Electric Vehicle Traction Motors: 48V–800V outrunner stators for e-bikes, e-scooters .
• Industrial BLDC Actuators: Robotic arms, servo drives, and medical equipment .
• Agricultural Spraying Drones: High-torque outrunner stators with dust/water-resistant epoxy coating .

1. Define motor outer diameter and stack length: Based on torque and power targets (e.g., 28mm OD for 5-inch FPV outrunner) .
2. Choose lamination material thickness: 0.20mm for high-frequency UAV (40-80kHz PWM) / 0.35mm for robust industrial outrunner motors .
3. Select slot/pole combination: 9N12P for high RPM, 12N14P for balanced torque/speed, 18N20P for high torque density .
4. Specify insulation and cooling: Epoxy coating for general use; oil-resistant coating for direct oil-cooled EV outrunners .
5. Request samples and validation: Reenives delivers first-article inspection reports (FAI) and material certificates for PPAP .

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