Stator laminations are thin, precision-stamped sheets of electrical steel that are stacked and bonded to form the stationary core of a brushless DC motor. Each lamination is electrically insulated from its neighbors—typically by a varnish or epoxy coating—to block eddy currents that would otherwise circulate within the core and generate heat. The thinner the lamination, the lower the eddy current loss; however, thinner sheets also reduce the stacking factor (the ratio of actual steel volume to total stack volume) and increase manufacturing costs.

Reenives manufactures high-quality stator laminations using non-grain oriented silicon steel (0.20mm/0.35mm) with advanced C5 epoxy powder coating — achieving core loss ≤11.8 W/kg @400Hz/1.0T and stacking factor ≥97%.

Reenives offers stator laminations 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 UAV/FPV), 0.27mm, 0.35mm (general industrial). The industry trend toward thinner laminations (0.25mm and below) improves high-frequency efficiency but complicates interlocking assembly.
• By Insulation Coating: C5 epoxy powder coating (Class H, 180°C) with >1800V dielectric strength; C3 organic varnish for cost-sensitive applications.
• By Stacking Method: Interlocking (≥0.25mm thickness only), laser welding, or epoxy bonding for ultra-thin laminations below 0.25mm.

💡 Reenives specialty: private mould development for custom stator lamination geometries — from OD 18mm to 210mm, 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, ASTM A677.

📐 Data source: Reenives in-house quality lab, 2025–2026. SGS verification available upon request. Iron losses measured on NO20 and M270-35A grades per IEEE Transactions on Magnetics methodology.

Reenives stator laminations power critical applications across multiple sectors:

• FPV Racing & Cinematic Drones: 2207, 2306, 2507 stator laminations with 92%+ peak efficiency at 45,000 RPM. Silicon steel stator sheets (0.2mm thickness) are standard for high-performance UAV motors rated up to 10,000W.
• Commercial UAVs & eVTOL: 12N14P / 18N20P laminations for 15-30kg payload with extended flight endurance.
• Agricultural Spraying Drones: High-torque laminations with C5 epoxy coating offering 500h+ salt spray resistance.
• Industrial BLDC Actuators & Servos: Precision laminations for cogging-free torque in robotics and automation.
• E-mobility & E-bike Hub Motors: Compact stator laminations for 100W-3kW auxiliary drives.

1. Define motor outer diameter and stack height: Based on torque and power targets (e.g., 28mm OD for 5-inch FPV drone).
2. Choose lamination material thickness: 0.20mm for high-frequency UAV (40-80kHz PWM) / 0.35mm for robust industrial motors. Consider that ultra-thin laminations (<0.25mm) cannot use interlocking stacking and require adhesive bonding.
3. Select slot/pole combination: 9N12P for high RPM, 12N14P for balanced torque/speed, 18N20P for high torque density.
4. Specify insulation and stacking method: C5 epoxy coating for outdoor UAVs; interlocking for 0.25mm+ laminations; epoxy bonding for sub-0.25mm designs.
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.