EMAX E3 2812 Brushless Motor

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EMAX / ECO III SERIES

EMAX ECO III 2812

A compact 12N14P external-rotor motor for 7- to 9-inch FPV aircraft, available in 920KV and 1150KV for long-range or higher-load configurations.

Built for high power that lasts.AL7075 anodized construction, steel shaft, precision bearing support, 3–6S operation and published maximum power up to 1,700W.
Framework12N14PExternal-rotor architecture
Motor size34.9 × 43.5Millimeters
Weight72 gWithout silicone wire
Propeller range7–9 inVariant dependent
EMAX ECO III 2812 brushless motor built for durable high-power FPV operation
01 / Choose Your KV

Two windings for 3S through 6S systems.

Select the winding around the complete aircraft, propeller, ESC, battery and cooling requirements.

920KV3–6S · 7–9-inch propeller · up to 1,425W published maximum power
1150KV3–6S · 7–8-inch propeller · up to 1,700W published maximum power
EMAX ECO III 2812 KV selection guide for 920KV and 1150KV
02 / Maximum Bench Results

Highest recorded thrust in each supplied test sheet.

KV Test propeller Voltage Current Thrust Power
920KV HQ 9×5×3 25 V 56.7 A 3480 g 1417.5 W
1150KV GF 8×6×3 25 V 67.3 A 3610 g 1682.5 W

Maximum-throttle bench results from the supplied EMAX load-test sheets. Results are configuration-dependent and are not guaranteed aircraft-level performance.

03 / Motor Construction

Material choices focused on durability and response.

The ECO III 2812 combines an AL7075 anodized housing, steel shaft, single-strand winding and G1-level precision bearing support in a compact external-rotor platform.

Exploded EMAX ECO III 2812 construction showing the steel shaft, anodized housing, rotor, winding and precision bearing
04 / Platform Details

Compact 2812 geometry with a 19 × 19 mm mounting pattern.

Framework 12N14P
Overall dimensions Ø34.9 × 43.5 mm
Weight 72 g without silicone wire
Propeller shaft M5 clockwise thread
Bearing shaft 5 mm
Mounting pattern 19 × 19 mm, M3
Leads 250 mm, 18 AWG silicone wire
AL7075 housingAnodized aluminum rotor construction.
Steel shaftM5 clockwise propeller thread.
Precision bearingG1-level rolling-element specification.
Two power profiles920KV and 1150KV.
EMAX ECO III 2812 compact high-performance FPV motor platform
05 / Electrical Specifications

Published limits by winding.

KV Cells Propeller Weight Idle current at 10 V Resistance Peak current Maximum power
920KV 3–6S 7–9 in 72 g 1.3 A 66 mΩ 57 A at 6S 1425 W at 6S
1150KV 3–6S 7–8 in 72 g 1.6 A 48 mΩ 68 A at 6S 1700 W at 6S

Weights exclude silicone wire.

06 / In The Box

Installation hardware included.

EMAX ECO III 2812 motor with five M3 mounting screws, aluminum M5 nylock nut, shaft screw and washer
  • 1 × ECO III 2812 motor
  • 5 × M3 × 9 mounting screws
  • 1 × aluminum M5 nylock nut
  • 1 × shaft screw
  • 1 × washer

Bench-test note: Performance values are measured test data, not guaranteed aircraft-level performance. Current draw, thrust, efficiency, RPM and temperature vary with propeller, battery voltage and sag, ESC behavior, airflow, ambient conditions and test equipment. Higher KV, larger propellers and higher voltage increase system load; select the motor winding, propeller, ESC, battery and cooling for the complete aircraft.