Motor bearings-is internal clearance important?

[Mercuriell]

Was browsing through bearing supplier, looking for some high quality bearings to go in my Scorp 45 motors, rather than the nameless bulk purchase stuff we're usually supplied with.

On the SKF site found out about the different categories of clearance available, CN the normal clearance supplied, but C3 clearances available with room for expansion due to high temperature. http://www.bearingworks.com/technica..._clearance.php

I guess for frame apps such as rotor grips or main shaft blocks, clearance not so critical but in view of the High temps and speeds our brushless motors run at, wouldn't C3 rated bearings be better?

I have been trying to get some high quality, German, Japanese, Swedish bearings, anyone know of a good supplier? Had some 6800zz from Scorpion, they were made in Indonesia and some MA packed bearings, made in Thailand. Most of the bearings I have bought from RCB or Boca have no Country of origin on so I guess would be Chinese.

[helicraze]

Ive always bought original or japanese bearings. Not sure on clearance.

I kept some bearings from tdr as they fit in 45xx motors, havent used them as yet because wasnt sure if it was good idea.