A Couple of Motor Questions

[sikeston34m]

Originally Posted by NovakTwo

The HV 14mm tuning rotor/5 mm shaft will not fit the old 4400 motor.

Using the Tuning rotor reduces the published Kv by about 20%,

Well that's kinda strange. I just installed the sintered rotor/5mm shaft into my HV4400 and it fits just fine. I used the upgraded endbell and shimmed accordingly.

I've been driving it around the yard and it works great.

The only difference between the sintered and the tuning rotor is diameter, right?

When installing the sintered rotor, I cut off the hollow packaging tube it came in.

I then stuck the hollow packaging tube down into the throat of the motor to help center the rotor while I installed it. It helped.

Anyways, the tube is 14mm in diameter.

I just checked and the 1/8" rotor that I removed, and it is 14mm in diameter.

Is there something here I'm missing about the difference between the sintered and the tuning rotor?