This shaft kit is for the HK-4025, HKIII-4025 & HKIV-4025 series motors that used in newer T-600 Heli. It measures 8mm in diameter, and is 84.9mm in length. The pinion end of this shaft is ground down to 5mm to allow the user to install 5mm pinion gears. The shaft kit will also fit other brushless motors that require a 5mm shaft of this length. The shafts can be cut shorter with a Dremel tool and a cut-off wheel if necessary to fit other motors.
