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Dustin seems to be enjoying his Roadster
Dustin Hoffman sports the all new exotic-electric Tesla car, LA
Stuart Koford wrote on April 21st, 2007 at 6:34 am
After 25 years of building all types of brushless motors for application from military robots, to space aplication for NASA, to surgical tools, and artificial hearts, and life and field testing every type of bearing mounting imaginable this is what I can tell you about the bearing spinning problem.
The problem of the bearings spinning in the motor housing will not be solved by switching to aluminum. The bearings must either be epoxied to the housing (preferable with heat cure epoxy) or rubber o rings mounted in grooves in the bearing pocket must be used to prevent any motion between the bearing and the housing. The use of o rings reduces noise especially if a heavy dampning grease is applied to the bearing pocket. Pressing the bearings into the aluminum housing also will not work due to the diffferential thermal expansion between the steel bearings and the aluminum or magnesium housing.
...Skoll certainly realizes that he can use his money in a variety of interesting ways. Unable initially to find someone to manage his personal finances, he started his wealth-management firm, Capricorn. Today the firm is branching into eclectic investments such as lending to midsize health care companies. It's also an investor in Tesla Motors (TSLA) -- Skoll drives a fire-engine-red Tesla Roadster...