5-inch FPV freestyle motor
EMAX ECO 2306
EMAX’s original ECO motor in the 2306 size: 12N14P, 28.3 g without leads, a hollow steel shaft in 9 mm EZO bearings, for 5 to 6-inch props on 3S–6S.
- 5-inch freestyle
- 6S (1700KV, 1900KV) or 4S (2400KV)
- 5 to 6-inch props
The spin is an illustration: the model turns at 1/600 of the no-load speed, and it is a generic 2306 motor drawn from EMAX’s published sizes, not its exact design. No-load speed is KV × 22.2 V, a nominal pack for this version. EMAX publishes no bench data for it.
- Weight
- 28.3 g
- without leads
Plain links: we earn nothing from them.
What you get
28.3 g
EMAX lists 28.3 g without leads and describes a new lightweight bell design for the ECO series.
Source: EMAX product page, EMAX ECO infographic
9 mm EZO bearings
A hollow steel shaft runs in EZO bearings of 9 mm outside and 4 mm inside diameter, which EMAX calls larger and more durable.
Source: EMAX product page, EMAX ECO infographic
Multi-strand windings
Multi-strand copper windings in what EMAX says is a copper alloy of its own design.
Source: EMAX product page, EMAX ECO infographic
What to pair it with
Our reading of EMAX’s numbers, so your build matches what the motor was tested with.
- Props
- EMAX lists 5 to 6-inch props. (EMAX product page)
- Battery
- 6S for the 1700KV and 4S for the 2400KV, as EMAX’s page title pairs them; the 1900KV is rated for 3S–6S. (EMAX product page)
- Frame
- A 16 × 16 mm hole pattern; EMAX does not give the screw size. (EMAX product page)
Where to buy
- EMAXthe maker’s global store (every KV was listed as sold out)$21.54seen Oct 19, 2026Visit
Plain links, not affiliate links. Prices change; the store’s page has the current one.
Full specs
| Spec | Value | Source |
|---|---|---|
| KV | 1,900 rpm/V (also 1700KV and 2400KV) | EMAX product page |
| Stator | 23 × 6 mm (2306) | EMAX product page |
| Configuration | 12N14P (12 stator slots, 14 magnet poles) | EMAX product page |
| Battery | 3S–6S LiPo (1700KV, 1900KV); 3S–4S (2400KV) (EMAX rates its 1500–1900KV versions for 3S–6S and its 2300–2700KV versions for 3S–4S) | EMAX product page |
| Weight | 28.3 g (without leads) | EMAX product page |
| Dimensions | φ27.7 mm, 30.2 mm long | EMAX product page |
| Shaft | Hollow steel, M5 prop thread (CW); 4 mm through the bearings | EMAX product page, EMAX ECO infographic |
| Mounting | 16 × 16 mm hole pattern (EMAX gives no screw size) | EMAX product page |
| Bell | Machined aluminium, dual anodised | EMAX product page, EMAX ECO infographic |
| Bearings | EZO, 9 mm OD × 4 mm ID | EMAX product page, EMAX ECO infographic |
| Winding | Multi-strand copper | EMAX product page, EMAX ECO infographic |
| Leads | 20 AWG silicone wire, 115 mm | EMAX product page |
Inside the motor
A brushless outrunner: the coils stand still in the middle and the magnets spin around them. From the top down:
- Shaft. Hollow steel, M5 prop thread (CW); 4 mm through the bearings. (EMAX product page, EMAX ECO infographic)
- Bell. Machined aluminium, dual anodised. (EMAX product page, EMAX ECO infographic)
- Stator. The coils are wound on a stack of thin steel laminations: 23 × 6 mm (2306). (EMAX product page)
- Winding. Multi-strand copper. (EMAX product page, EMAX ECO infographic)
- Bearings. EZO, 9 mm OD × 4 mm ID. (EMAX product page, EMAX ECO infographic)
- Base. 16 × 16 mm hole pattern (EMAX gives no screw size). (EMAX product page)
How fast it spins
KV is the motor’s no-load speed per volt. With nothing on the shaft, the 1900KV version reaches about these speeds; a prop loads the motor and brings it down, typically to around 70–75% of these figures at full throttle.
| Battery | Volts | No-load rpm (KV × V) | Electrical frequency | ESC steps per second |
|---|---|---|---|---|
| 4S nominal | 14.8 | 28,120 | 3,281 Hz | 19,684 |
| 4S full | 16.8 | 31,920 | 3,724 Hz | 22,344 |
| 6S nominal | 22.2 | 42,180 | 4,921 Hz | 29,526 |
| 6S full | 25.2 | 47,880 | 5,586 Hz | 33,516 |
A 14-pole rotor has 7 pole pairs, so every turn of the shaft is 7 electrical cycles, and a six-step ESC switches the phases 42 times per turn.
About the 3D model
A generic outrunner drawn from EMAX’s published sizes: the 23 × 6 mm stator, 27.7 mm bell, 5 mm shaft, 16 mm mounting circle and 12 teeth and 14 magnets. Anything EMAX doesn’t publish is typical for a motor this size, and the bell’s spoked top, the base and the inside are a generic design, not this motor’s. The colours are read off the maker’s product photos. There are no logos or markings: it is our drawing, not the maker’s.
Sources
- EMAX: ECO Series 2306 6S 1700KV 4S 2400KV Brushless Motor (product page on EMAX’s global store, with its spec list). Retrieved Oct 19, 2026.
- EMAX: ECO Series infographic (image on EMAX’s product page). Retrieved Oct 19, 2026.
