A frameless motor stator core is the stationary laminated core of a frameless brushless motor—a motor without the traditional housing that allows integration directly into mechanical structures. In a frameless configuration, the stator is typically inserted directly into the application's housing or supported by bearings, while the rotor is mounted onto the driven shaft, eliminating bulky motor housing. This architecture significantly reduces weight and inertia, enabling higher power-to-weight ratios essential for drone propulsion systems and aerospace actuators.

Reenives manufactures high-quality frameless motor 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 motion applications in drone propulsion and aerospace systems.

Reenives offers frameless motor stator cores in multiple configurations to meet diverse drone propulsion and aerospace application requirements:

• By Slot/Pole Config: 9N12P (high RPM), 12N14P (balanced torque/speed for UAV gimbals & propulsion), 18N20P (high torque density), 24N28P (heavy-duty robotics & aerospace actuators).
• By Material Thickness: 0.15mm (ultra-compact, high-speed aerospace), 0.20mm (standard high-performance drone propulsion), 0.27mm, and 0.35mm (general industrial).
• By Insulation Coating: C5 epoxy powder coating (Class H, 180°C) with >2000V dielectric strength; C6 grade for superior thermal conductivity and corrosion resistance in aerospace environments.
• By Stacking Method: Interlocking self-bonding (≥0.27mm), laser welding, or epoxy bonding (ultra-thin laminations below 0.25mm).
• By Mounting Interface: Through-hole shaft mounting, bolt-on flange mounting, or custom integration options for specific drone propulsion systems.

💡 Reenives specialty: private mould development for custom frameless motor stator geometries — optimized for unique drone propulsion, UAV gimbal, and aerospace actuator integration requirements.

All parameters validated by Reenives R&D center (ISO 9001:2025 certified) and third-party testing per IEC 60404-2, ASTM A912. The global frameless motor market growth is driven by demand for lightweight, high-efficiency solutions in drone propulsion and robotics.

📐 Data source: Reenives in-house quality lab, 2025–2026. SGS verification report available. Market data: Global Frameless Motor Market Report.

Reenives frameless motor stator cores power critical applications across multiple sectors:

• Drone Propulsion Systems: Compact, lightweight frameless stators for thrust-vectoring drones, UAV propulsion modules, and ducted fan systems where weight reduction is critical.
• UAV Gimbal & Camera Stabilization: Ultra-compact frameless stators with low cogging torque for smooth, precise camera control in professional aerial photography.
• Aerospace Flight Control Actuators: Lightweight frameless motors for flight control surfaces, flaps, and propulsion systems in unmanned and manned aerospace platforms.
• Robotic Joint Actuators: High torque density in minimal volume for collaborative robot arms and humanoid robotics.
• Medical & Surgical Robotics: Precise, low-vibration motion for minimally invasive surgical tools and diagnostic equipment.

1. Define mechanical envelope and integration requirements: Determine allowable outer diameter, inner diameter (for shaft clearance), and stack height for your drone propulsion module or aerospace actuator.
2. Choose lamination material thickness: 0.15mm for ultra-compact, high-speed aerospace applications; 0.20mm for standard high-performance drone propulsion motors; 0.35mm for robust industrial applications.
3. Select slot/pole combination: 9N12P for high RPM, 12N14P for balanced torque/speed (common for UAV propulsion), 18N20P for high torque density.
4. Specify mounting interface and thermal management: Through-hole shaft mounting or bolt-on flange; consider heat dissipation requirements for high-power drone propulsion systems.
5. Request samples and validation: Reenives delivers first-article inspection reports (FAI) and material certificates. Prototype frameless motor 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.