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EMAX E3 3115 Brushless Motor

EMAX E3 3115 Brushless Motor

$49.89 USD
$49.89 USD
Sale Sold out
Shipping calculated at checkout.
KV

192 in stock

EMAX / ECO III SERIES

EMAX ECO III 3115

A 12N14P external-rotor platform for 8- to 10-inch FPV aircraft, available in four windings from high-voltage endurance builds to responsive freestyle configurations.

Built for high power that lasts.AL 7075 anodized construction, steel shaft, precision bearing support and winding options spanning 4S through 12S.
Framework12N14PExternal-rotor architecture
Motor size38.8 × 48.6Millimeters
Weight range108–111 gWithout silicone wire
Propeller range8–10 inVariant dependent
EMAX ECO III 3115 brushless motor built for durable high-power FPV operation
01 / Choose Your KV

Four windings for 4S through 12S systems.

Choose the winding around the complete aircraft, voltage, propeller, ESC and cooling requirements.

400KV10–12S · 10-inch propeller
640KV6S–8S · 10-inch propeller
900KV4S–6S · 10-inch propeller
1050KV4S–6S · 8–9-inch propeller
EMAX ECO III 3115 KV selection guide for 400KV, 640KV, 900KV and 1050KV
02 / Maximum Bench Results

Highest recorded thrust in each supplied test sheet.

KV Test propeller Voltage Current Thrust Power
400KV HQ 10×5×3 48 V 35.4 A 4630 g 1699.2 W
640KV HQ 10×5×3 32 V 58.2 A 4760 g 1862.4 W
900KV GF 10×5×3 25 V 73.4 A 4580 g 1835 W
1050KV HQ 9×5×3 25 V 87.8 A 4750 g 2195 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 3115 combines an AL 7075 anodized rotor housing, steel shaft, arc magnets, copper winding and precision bearing support in a compact external-rotor platform.

Exploded EMAX ECO III 3115 construction showing steel shaft, anodized housing, magnet ring, copper-wound stator and precision bearing
04 / Platform Details

Compact 3115 geometry with a 19 × 19 mm mounting pattern.

Framework 12N14P
Overall dimensions Ø38.8 × 48.6 mm
Variant weight 108–111 g without silicone wire
Propeller shaft M5 clockwise thread
Bearing shaft 5 mm
Mounting pattern 19 × 19 mm, M3
Leads 270 mm, 18 AWG silicone wire
AL 7075 housingAnodized aluminum rotor construction.
Steel shaftM5 clockwise propeller thread.
Precision bearingG1-level rolling-element specification.
Four power profiles400KV, 640KV, 900KV and 1050KV.
EMAX ECO III 3115 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
400KV 10–12S 10 in 109 g 0.6 A 141 mΩ 36 A at 12S 1728 W at 12S
640KV 6S–8S 10 in 111 g 1.2 A 64 mΩ 59 A at 8S 1888 W at 8S
900KV 4S–6S 10 in 108 g 1.7 A 42 mΩ 77 A at 6S 1925 W at 6S
1050KV 4S–6S 8–9 in 110 g 2.1 A 35 mΩ 88 A at 6S 2200 W at 6S

Weights exclude silicone wire.

06 / In The Box

Installation hardware included.

EMAX ECO III 3115 motor with mounting screws, lock nut, propeller screw and washer
  • 1 × ECO III 3115 motor
  • 5 × M3×10 mounting screws
  • 1 × aluminum M5 nylock nut
  • 1 × propeller 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.

Shipping & returns

Shipping policy

Processing

Orders ship within 1–2 business days (excluding weekends, US holidays, and posted vacation dates). You receive a confirmation email with tracking once your order ships.

Rates and delivery

  • US orders of $99 or more ship free (Standard).
  • Standard (US): 3–7 business days. Expedited (US): 1–3 business days.
  • International: 7–14 business days depending on destination and carrier; rates are calculated at checkout.

Restrictions

  • We ship to selected countries only; availability is shown at checkout.
  • No P.O. Boxes or APO/FPO addresses.
  • Batteries ship by ground only and cannot be shipped outside the US. The DinDrones battery box with batteries is US-only.

Lost or damaged shipments

Contact din@dindrones.com within 7 days of the delivery date. We open the carrier claim and resolve it with you.

Changes and cancellations

Orders can be changed or cancelled within 24 hours of placement. After that, the order has usually been packed; use the return policy instead.

Customs and duties

International customers are responsible for any customs fees, taxes, or duties charged on import.

Refund policy

30-day returns

Unused items in original condition and packaging can be returned within 30 days of delivery. Email din@dindrones.com with your order number to get return instructions before shipping anything back.

What is not returnable

  • Frames, parts, or electronics that have been built, flown, soldered, or crashed.
  • Batteries and other hazmat items, once shipped.
  • Custom or 3D-printed items made to order.

Refunds

Refunds go to the original payment method within 5 business days of receiving and inspecting the return. Original shipping charges are not refunded; return shipping is paid by the customer unless the item arrived damaged or we shipped the wrong item.

Defective or wrong items

If a part is defective on arrival or we sent the wrong item, contact us within 7 days of delivery and we replace it or refund it at our cost.

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EMAX E3 3115 Brushless Motor