Originally Posted by rusty case
Is there a thread for balancing this kind of rotor blades?
This is how I done it with an old brushless out runner.
Just take the bell off the motor and you have a twin ball bearing shaft with a ready made mount to screw to your bench.
To make the bearings run really free inject a little bit of white spirits into the bearing (think they call it mineral spirit in USA).
Just make sure it is a 3mm shaft motor not the 1/8" size (3.17)
The 3mm shaft is a nice tight fit on the AUTO G hub. I added clear tape to the light blades and eventually the blades will stay where you put them.