A micro outrunner brushless motor stator core is the stationary laminated magnetic structure of an outrunner BLDC motor designed for ultra-compact applications — typically weighing 1-5g with outer diameters from 6mm to 12mm . In an outrunner configuration, the stator core is located on the inside while the rotor housing spins around it, allowing the magnet ring to be larger and enabling more magnetic poles for increased torque at low RPM .

Reenives manufactures high-quality micro outrunner stator cores using non-grain oriented silicon steel (0.10-0.20mm) with advanced C5 epoxy coating — reducing eddy current losses by up to 35% and ensuring high thermal stability for sustained micro drone and robotics operation .

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

• By Motor Size (OD × Height): 0702 (7mm OD, 2mm height — 1S tiny whoops), 0802 (8mm OD, 2mm height — 1S whoops), 1003 (10mm OD, 3mm height — 2S toothpick), 1103 (11mm OD, 3mm height — 2-3S micro drones) .
• By Slot/Pole Config: 9N12P — the industry standard for micro outrunner motors (9 stator teeth, 12 magnetic poles), delivering smooth operation and high torque density .
• By Material Thickness: 0.10mm (ultra-high performance, Japanese-grade for 1S whoops), 0.15mm (premium micro FPV), 0.20mm (standard micro UAV/robotics) .
• By Insulation Coating: C5 epoxy powder coating (Class H, 180°C) with >2000V dielectric strength; thin-film coating (20-30μm) for tight slot geometries in micro stators .
• By Stacking Method: Epoxy bonding — essential for ultra-thin 0.10-0.15mm laminations to achieve 98.6% stacking factor.

💡 Reenives specialty: private mould development for custom micro outrunner stator geometries — optimized for specific tiny whoop and toothpick platforms from 1S to 3S .

All parameters validated by Reenives R&D center (ISO 9001:2025 certified) and third-party testing per IEC 60404-2 . Independent testing on micro drone motors with Reenives stator cores shows 12% higher torque density and 8-12°C lower winding temperature 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 micro outrunner stator cores power critical micro applications across multiple sectors :

• Tiny Whoops & 1S Micro Drones: 0702, 0802 stators with 0.10-0.15mm laminations delivering 19,000-22,000 KV performance for 40mm propellers — weighing as little as 2.2g per motor .
• Toothpick & 2-3S Micro FPV: 1003, 1103 stators with 0.15-0.20mm laminations for 2-3 inch propellers, balancing power and efficiency for indoor and garden racing.
• Micro Robotic Actuators: 8-12mm stators for miniature servo modules, drone gimbals, and precision positioning systems requiring low cogging torque and high positional accuracy .
• Wearable & Portable Devices: Ultra-compact stators for medical devices, haptic feedback systems, and miniature pumps.
• Indoor Surveillance & Nano UAVs: Lightweight, high-efficiency stators for miniature intelligence, surveillance, and reconnaissance (ISR) platforms .

1. Define drone class and battery voltage: For 1S tiny whoops (3.7V), select 0702 or 0802 motor size with 0.10-0.15mm laminations. For 2-3S micro drones (7.4-11.1V), 1003-1103 sizes with 0.15-0.20mm laminations are optimal.
2. Choose lamination material thickness: 0.10mm for premium 1S whoop performance (lowest core loss, 6-10°C cooler); 0.15mm for standard micro FPV; 0.20mm for budget 1S builds .
3. Select slot/pole combination: 9N12P for balanced torque/speed and smooth operation — the industry standard for micro outrunner motors .
4. Specify insulation and stacking method: Epoxy bonding for 0.10-0.15mm ultra-thin laminations; thin-film coating (20-30μm) for maximum slot fill area in micro stators.
5. Request samples and validation: Reenives delivers first-article inspection reports (FAI) and material certificates. Prototype micro 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.