A frameless brushless motor stator core is a stationary laminated core designed for frameless brushless DC motors—motors 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.

Reenives manufactures high-quality frameless brushless stator cores using non-grain oriented silicon steel (0.20mm/0.35mm) with advanced C5 epoxy powder coating — ensuring low core loss, high thermal stability, and minimal cogging torque for precision motion applications.

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

• By Slot/Pole Config: 9N12P (high RPM), 12N14P (balanced torque/speed for UAV gimbals), 18N20P (high torque density), 24N28P (heavy-duty robotics).
• By Material Thickness: 0.15mm (ultra-compact, high-speed), 0.20mm (standard high-performance), 0.27mm, and 0.35mm (general industrial).
• By Insulation Coating: C5 epoxy powder coating (Class H, 180°C) with >1800V dielectric strength.
• By Stacking Method: Interlocking self-bonding, laser welding, or epoxy bonding.
• By Mounting Interface: Through-hole shaft mounting, bolt-on flange mounting, or custom integration options.

💡 Reenives specialty: private mould development for custom frameless stator geometries — optimized for unique UAV gimbal, robotic joint, 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.

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

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

• UAV Gimbal & Camera Stabilization: Ultra-compact frameless stators with low cogging torque for smooth, precise camera control.
• Robotic Joint Actuators: High torque density in minimal volume for collaborative robot arms and humanoid robotics.
• Aerospace Flight Control Actuators: Lightweight frameless motors for flight control surfaces and propulsion systems.
• Medical & Surgical Robotics: Precise, low-vibration motion for minimally invasive surgical tools and diagnostic equipment.
• Industrial Automation: Direct-drive applications in packaging, pick-and-place, and conveyor systems.

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