Cobra C-4120-22

The Cobra 4120 series motors have a 6.0mm shaft for extra strength, as well as oversize ball bearings to support the shaft and provide a long life. There are two internal bearing measure 12mm x 6mm x 4mm and the outer bearing measures a massive 17mm x 6mm x 6mm! The stators are made with 0.20mm laminations for maximum efficiency and minimum Eddy Current losses. Also included on the motor are ultra-flexible motor leads with high-temp silicone rubber insulation and 4.0mm bullet connectors already installed.

To complete the package, a complete hardware accessory kit is included with every Cobra Motor. Included in this hardware kit are the following items:

● Heavy Duty 3mm Thick Cross Style Motor Mount
● Four M4x8mm Motor Mount Screws
● Bolt-On style threaded prop adapter with 8mm shaft and M8x1.0mm thread
● 3 Prop Adapter retaining screws
● Shaft Retaining Collar with Set Screw
● Three female 4.0mm bullet connectors
● Three pieces of heat-shrink tubing

Cobra C-4120/18 Motor Specifications

Stator Diameter ................................... 41.0 mm (1.614 in)
Stator Thickness .................................. 20.0 mm (0.787 in)
No. of Stator Arms ....................................................... 12
No. of Magnet Poles ...................................................... 14
Motor Wind .................................................. 22 Turn Delta
Motor Kv .................................................... 430 RPM / Volt
No-Load Current (Io) ........................ 1.14 Amps @ 20 Volts
Motor Resistance (Rm) Per Phase ..................... 0.060 Ohms
Motor Resistance (Rm) Phase to Phase ............. 0.040 Ohms
Max Continuous Current ....................................... 45 Amps
Max Continuous Power on 4S Li-Po ...................... 670 Watts
Max Continuous Power on 5S Li-Po ...................... 830 Watts
Max Continuous Power on 6S Li-Po .................... 1000 Watts
Max Continuous Power on 8S Li-Po .................... 1330 Watts
Weight .............................................. 290 Grams (10.23 oz)
Outside Diameter .................................. 49.8 mm (1.961 in)
Shaft Diameter ..................................... 6.00 mm (0.236 in)
Body Length ......................................... 51.8 mm (2.039 in)
Overall Shaft Length .............................. 74.5 mm (2.933 in)