Motor laminations are thin, precision-stamped sheets of electrical steel that are stacked and bonded to form the stator and rotor cores of brushless DC motors. Each lamination is electrically insulated from its neighbors to block eddy currents that would otherwise circulate within the core and generate heat. The choice of lamination thickness involves a trade-off: thinner sheets reduce eddy current losses but lower stacking factor—the ratio of actual steel volume to total stack volume—and increase manufacturing complexity.

Reenives manufactures high-quality motor laminations using non-grain oriented silicon steel (0.15mm–0.35mm) with advanced C5/C7 epoxy powder coating—achieving core loss as low as 7.5 W/kg @400Hz/1.0T and stacking factor ≥97%.

Reenives offers motor laminations in multiple configurations to meet diverse application requirements:

• By Component Type: Stator laminations (outer/inner), rotor laminations (inner/outer), and segmented stator laminations for simplified winding.
• 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: 0.15mm (ultra-high RPM, 6S racing), 0.20mm (standard high-frequency UAV/FPV), 0.27mm, 0.35mm (general industrial). Laminations below 0.25mm require adhesive bonding as interlocking is not feasible.
• By Insulation Coating: C5/C7 epoxy powder coating (Class H, 180°C) with >1800V dielectric strength; self-bonding coatings for ultra-thin stacks.
• By Stacking Method: Interlocking (≥0.25mm thickness only), laser welding, epoxy bonding, or self-bonding adhesive coatings.

💡 Reenives specialty: private mould development for custom motor lamination geometries — from OD 18mm to 550mm, with custom slot profiles and skew designs to reduce cogging torque.

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 available upon request.

Reenives motor laminations power critical applications across multiple sectors:

• FPV Racing & Cinematic Drones: 2207, 2306, 2507 laminations with 92%+ peak efficiency at 45,000 RPM. 0.15mm ultra-thin stacks for competitive 6S racing.
• Commercial UAVs & eVTOL: 12N14P / 18N20P laminations for 15-30kg payload with extended flight endurance.
• Agricultural Spraying Drones: High-torque laminations with C5/C7 epoxy coating offering 500h+ salt spray resistance.
• Industrial BLDC Actuators & Servos: Precision laminations for cogging-free torque in robotics and automation.
• Electric Vehicles & E-mobility: Stator and rotor laminations for automotive traction motors, e-bikes, and e-scooters.

1. Define operating frequency & motor speed: For PWM >20kHz and RPM >40,000, select 0.15–0.20mm laminations. For standard industrial motors (<10kHz, 0.27–0.35mm is cost-effective).
2. Choose material grade and thickness: 0.15mm (27GP120) for extreme 6S racing; 0.20mm (35W270) for standard high-frequency UAV; 0.35mm for robust industrial motors.
3. Select slot/pole combination: 9N12P for high RPM, 12N14P for balanced torque/speed, 18N20P for high torque density.
4. Specify stacking method and insulation: Interlocking for 0.27mm+; self-bonding/epoxy bonding for sub-0.25mm; C5/C7 epoxy coating for outdoor UAVs.
5. Request samples and validation: Reenives delivers first-article inspection reports (FAI) and material certificates. Prototype lamination 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.