EMAX ECO II 3115 Brushless Motor 640KV
by EMAX

The EMAX ECO II 3115 640KV Brushless Motor is engineered for mid‑to‑large drone platforms where efficiency, torque, and reliability matter. Built in the robust 3115 stator size and optimized for 6S to 8S LiPo packs, this motor excels with 10″ props and delivers up to 2,016W of power. It offers low internal resistance (≈ 0.066Ω), smooth throttle response, and advanced cooling for long-range, cinematic, and heavy-lift flight applications.

This version includes high-temp copper windings, precision-machined bell, NSK bearings, and balanced multi-strand single-wrap winding. It comes with mounting hardware, using a 5mm shaft and 16×16 mm bolt pattern for easy installation.

Perfect for builders and pilots seeking endurance, stability, and high-performance in one cost-effective package.

Specifications:
• KV Rating: 640KV
• Stator Size: 31×15 mm (3115)
• Voltage Range: 6–8S LiPo
• Peak Current: ≈63 A at 8S
• Max Power: ≈2,016 W
• Internal Resistance: ~0.066 Ω
• Idle Current (10V): ~1.2 A
• Recommended Propeller: 10″
• Shaft Diameter: 5 mm
• Mounting Pattern: 16×16 mm (M3 screws)
• Weight: ~106 g (without wires)
• Construction: Anodized CNC aluminum bell, NSK bearings, high-temp copper winding
• Includes: Motor and hardware kit
• Ideal For: Macro freestyle drones, long-range builds, heavy-lift rigs