Re: [Vo]:BB motor -- explanation (maybe not!)

[Horace Heffner]

Also of possible related interest is that I tried a regular steel  
ball bearing and a stainless ball bearing on the same aluminum shaft  
and it appeared the torque was abut half that for two steel bearings.

Best regards,
Horace Heffner
http://www.mtaonline.net/~hheffner/