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Scorpion HK-4025-630 (6mm Shaft) Brushless Outrunner Motor

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Scorpion HK-4025-630 (6mm Shaft) Brushless Outrunner Motor


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The Scorpion HK-4025 motors have been developed for the 550 to 600 class electric helicopters and the HK-4025-550KV motor is suitable for the glow to electric conversation of 50 size helicopter. These motors are designed to provide all the power that you can use, while still maintaining excellent efficiency and cool running characteristics.

Scorpion HK 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 in normal use.

This Scorpion HK-4025-630KV motors come with 4mm male Bullet style connectors already attached, and include a hardware package that contains 3 matching female Bullet connectors for your speed controller with matching heat shrink tubing. For maximum strength, this Scorpion HK-4025-630KV motors feature an 8mm motor shaft that is ground down to a 6mm diameter at the output end to fit standard size pinion gears. Since the HK series motors are primarily designed for Helicopter and Ducted Fan use, they do not include a prop adapter. If you intend on running a prop on this motor, you will need to purchase a prop adapter for a 5mm shaft.

Stator Diameter: 40mm (1.56 in)
Stator Thickness: 25mm (0.98 in)
No. of Stator Arms: 12
Magnet Poles: 8
Motor Wind: 12 Turn Delta
Motor Wire: 20 - Strand 0.25mm
Motor Kv: 630KV RPM / Volt
No-Load Current (IO): 1.1 Amps @ 8.4v
Motor Resistance (RM): 0.024 Ohms
Max Continuous Current: 65 Amps
Max Continuous Power: 2700 Watts
Weight: 326 Grams (11.50 oz)
Outside Diameter: 48.9 mm (1.9 in)
Shaft Diameter: 5.98 mm (0.235 in)
Body Length: 51.5 mm (2.01 in)
Overall Shaft Length: 83.7 mm (3.30 in)
Max Lipo Cell: 12s
Motor Timing: 5deg
Drive Frequency: 8kHz

  • Kv(rpm/v) 630.00
  • Max Current (Motor) (A) 65.00
  • Resistance (mh) 24.00
  • Max Voltage (V) 44.00
  • Power (W) 2700.00
  • Shaft A(mm) 6.00
  • Length B (mm) 53.00
  • Can Diameter C(mm) 49.00
  • Can Length D(mm) 30.00
  • Total Length E(mm) 84.00

Dimension Diagram Guide

  • attributeset-10


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Oleg | Verified Buyer

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Dec 05, 2011

T-Rex 600

| Verified Buyer

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Certified Buyer Rated

Nov 25, 2011

Aplus build quality, idles at 160W with 44V. oddly, the centripedal fan on the motor doesn't make much airflow, due to the tapered design. why did they do that? as a result, it runs hotter than scorpion motors with a barrel shape rotor, which create better airflow for cooling.

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