8mm Shaft Replacement for RC Outrunner Motors - Scorpion SPHK4035MSK8  [SPHK4035MSK8]

Outrunner Motor Shaft Service Kit

This Scorpion SPHK4035MSK8 shaft kit serves as an aftermarket replacement for outrunner brushless motors that take an 8mm shaft. It is useful when the original shaft has wear, collar scalloping, or slight damage that causes imbalance or runout.

Install this kit during routine service or a mid-level rebuild to restore mechanical alignment between rotor and stator and to secure the mounting for pinions or other driveline interfaces found on outrunner motors. Make sure the motor is an outrunner and that the interface is 8mm before proceedng with purchase.

Service tips: inspect bearing condition and bearing seats before fitting the new shaft, confirm the shaft seats squarely in rotor and bearings, and verify axial play and runout after assembly. Tighten retaining hardware to proper torque and perform a static balance before dynamic testing.