This is the Scorpion HKIII-4025-550 Brushless Motor with a 6mm Shaft. The Scorpion HKIII-4025-550KV motor is an awesome motor for 600 class 6 to 12S compatible helicopters, as well as 50 Class electric conversions that use 12S. These motors are designed to provide all the power that you can handle, while maintaining excellent efficiency and cool running characteristics.
Scorpion Competition Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold anodized to provide a beautiful, long-lasting finish. The stators are made with 0.2mm laminations to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are rated for operation at 200 degrees C (392 F), making a motor that is virtually impossible to burn up during normal use.
Scorpion Motors are built to last, and are backed with a 2-Year manufacturers warranty against defects in materials or workmanship. However, due to the high RPM of these motors, and the fact that we cannot control the installation and setup, the bearings are not covered by the 2-Year warranty, nor is any subsequent damage caused to the motor due to a bearing failure. Bearings are a normal wear item, and as such, need to be maintained and changed periodically. For maximum life, make sure that a sufficient gap is left between the pinion and main gear during motor installation to avoid binding, and put a small drop of oil on each bearing every 5-6 flights. It is the responsibility of the pilot to ensure that the bearings are maintained properly. For the best overall combination of quality, performance, and value, use Scorpion Motors in your helicopter!
Stator Diameter: 40mm (1.56")
Stator Thickness: 25mm (0.98")
Stator Arms: 12
Magnet Poles: 10
Motor Wind: 6T/7T Delta
Motor Wire: 22 - Strand 0.25mm
Motor Kv: 550KV RPM / Volt
No-Load Current (IO): 1.65 Amps @ 10v
Motor Resistance (RM): 0.023 Ohms
Max Continuous Current: 65 Amps
Max Continuous Power: 2850 Watts
Weight: 354 Grams (10.75 oz)
Outside Diameter: 49.9mm (1.97")
Shaft Diameter: 6mm (0.24")
Body Length: 51.8mm (2.04")
Overall Shaft Length: 83.7mm (3.30")
Max Lipo Cell: 12S
Peak Current: 90 Amps (5 seconds)
Peak Continuous Power: 3900W (5 seconds)
Motor Timing: 5°
Drive Frequency: 8kHz