Spektrum SPMXSM1400 Firma 3652 4000Kv 4-Pole Brushless Motor for 1/10 with 3.175mm motor shaft

The Firma 4000Kv brushless motor is a great choice for 1/10 scale 4WD, 2WD, and on-road models running on 2S LiPo power. Featuring a low cog 4-pole 8-magnet rotor design, CNC machined aluminum housing, insulated high purity copper windings, high-quality alloy steel 3.175mm (1/8") output shaft, and precision bearings for high durability and smooth rotation. Preinstalled 4mm gold plated bullet connectors for easy installation, and perfectly matched for the Firma 85A Smart ESC.
Key Features:
Excellent upgrade for 540- and 550-size brushed motors with the same diameter and mounting pattern (vehicle must accept pinions with a 1/8" mm bore)
High-quality 4-pole sintered rotor
4mm gold plated bullet connectors
High-quality construction with precision ball bearings and hardened steel 1/8" shaft
Technical Specifications:
Application
1/10 scale 4WD, 2WD, and on-road models running on 2S LiPo power
Bushing Or Bearing
Bearing
Connector Type
4mm Bullet
Efficiency
81%
Input Voltage
6 - 8.4V
Maximum Continuous Current
40A
Motor Design
Inrunner
Motor Size
3652
Motor Type
Brushless - Sensorless
Number of Poles
4
Product Weight
7.4oz (210g)
RPM/Volt (Kv)
4000Kv
Shaft Diameter
0.125" (3 mm)