Parts/Electric power/Brushless motors/Spektrum RC Firma 3660 4-Pole Sensorless Brushless Motor (4000kV)
Spektrum RC Firma 3660 4-Pole Sensorless Brushless Motor (4000kV)
Spektrum RC

Spektrum RC Firma 3660 4-Pole Sensorless Brushless Motor (4000kV)

Part # SPMXSM50005.0(1)
Where to buy
$45.99
AMain Hobbies
Seen Oct 12, 2026
$45.99Buy
Prices are as last seen at the store; stock is not tracked.

About this part

Motor Overview:

The Spektrum™ Firma 3660 4-Pole Sensorless Brushless Motor is a high-performance replacement motor designed for the Arrma® Vorteks 223S and Quake 223S DSC platforms. It's also an excellent upgrade option for other platforms such as the Arrma Fury 223S or the Arrma Infraction BLX when running on 2-3S power. Built for strength, efficiency, and smooth operation, this brushless motor delivers reliable torque and consistent speed for demanding RC applications.

About the Firma 3660 Brushless Motor


Precision & Power

Featuring a four-pole rotor design, the Firma 3660 provides superior torque and throttle response. Its CNC-machined aluminum housing ensures optimal heat dissipation and durability, while insulated high-purity copper windings promote efficient power transfer. The five-millimeter alloy steel output shaft provides extra strength and smooth rotation, reducing wear over time. With preinstalled four-millimeter gold-plated bullet connectors, installation is quick and hassle-free, getting you back on the track faster.

Features:

  • 2-3S LiPo power compatible for versatile performance
  • 4-pole rotor design delivers strong torque and smooth control
  • CNC-machined aluminum housing improves cooling and durability
  • Insulated high-purity copper windings enhance efficiency
  • 5mm alloy steel output shaft ensures strength and reliability
  • Preinstalled 4mm gold-plated bullet connectors for easy setup

Includes:

  • (1) Firma 3660 4-Pole Sensorless Brushless Motor

Specifications:

Motor Type Brushless
RPM/Volt (kV) 4000kV
Input Voltage 2-3S LiPo (7.4-11.1V)
Motor Size 3660
Poles 4
Length 2.36in (60mm)
Diameter 1.41in (36mm)
Shaft Length 0.87in (22mm)
Shaft Diameter 0.19in (5mm)
Weight 10.58oz (300g)
Motor Connector 4mm Bullets
CA Residents Prop 65 Warning WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov Details...

Reviews5.0 · 1 review

GageVerified owneron Spektrum RC Firma 3660 4-Pole Sensorless Brushless Motor (4000kV)

Working great in my Gorgon plenty of power and speed equivalent to my Quake

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