ECO II 2004 Brushless MotorCHOOSE KV

ECO II 2004 Stator — For 5" Propeller Ultralight Racing and Freestyle Craft, 3-4" Propeller Cinewhoop

The engineers at EMAX are always seeking ways to design the ultimate motor with brushless technology. In their efforts, they produced the ECO II Series, a new line of brushless motors further improving on the performance and durability while retaining the same affordability.

Redesigned from the ground up, the ECO II boasts an all new architecture. With a more rounded design paired together with thicker reinforcements, maximum durability is achieved. Finished with a reflective surface, the ECO II offers a sleek modern design destined to satisfy the need for both aesthetics and durability.

In order to improve the performance from its predecessor, the ECO II utilizes N52SH arc magnets over prior N48 magnets, allowing more powerful throttle response and higher RPMs to be achieved. More torque and thrust is generated, allowing pilots the flexibility to comfortably meet the demands of any racetrack or flight situation.

The ECO II Series marks the next evolution in affordable brushless motor technology, bringing in a new era of performance for everyone.

The ECO II Series motors feature:

• A brand new design with a rounded bell and stronger attachment points for increased durability.
• Fully mirror-polished finish that shines and glistens with even the smallest hint of light.
• Upgraded N52SH curved arc magnets for tighter airgap and better performance.
• Precision NSK bearing for unparalleled smooth operation.
• 12x12mm motor mounting.

EMAX brushless motors are suitable for a wide range of hobby, engineering, and custom motion-control applications. They're ideal for high-speed propulsion, precision motion control, custom cooling fans, gimbals, 3D-printed mechanisms, and STEM or engineering prototypes.

If you're building lightweight, high-efficiency systems that need reliable power, smooth operation, and long service life, EMAX brushless motors are the go-to solution.

EMAX ECO II 2004 Brushless Motor — 5" Ultralight Racing, Freestyle & 3-4" Cinewhoop

The EMAX ECO II 2004 is a uniquely versatile motor in the ECO II lineup — its slim 2004 stator profile makes it exceptionally lightweight for a full-size motor, opening up two distinct use cases: ultralight 5" racing and freestyle builds where every gram counts, and 3-4" cinewhoop builds where a full-size motor delivers more torque than a micro motor without the weight penalty of a larger stator. The precision NSK bearing and 12x12mm mounting pattern make it a clean fit for both toothpick-style 5" frames and standard 3-4" cinewhoop frames. Available in multiple KV options.

• 2004 stator — ultralight profile for 5" racing/freestyle and 3-4" cinewhoop builds
• Dual use case — lightweight enough for toothpick 5" builds, torquey enough for 3-4" cinewhoops
• Precision NSK bearing — smooth, low-friction operation for extended motor life
• 12x12mm mounting pattern — fits toothpick 5" frames and standard 3-4" cinewhoop frames
• N52SH arc magnets — stronger than N48, delivering more torque and higher RPM
• Multiple KV options available — choose the right winding for your battery voltage and build type

The most versatile motor in the ECO II lineup. One motor, two build categories — ultralight 5" or capable 3-4" cinewhoop.