On 6/2/2014 George Dubovsky wrote:
> The big difference IMO is that you *use* yours. The really damaged ones
> I've seen - and they are the ones I inherited to make my modified ones -
> are from something like a TH-6 mounted on a Ham M or similar and, most
> importantly, parked in one direction for 9 months of the year (or longer)
I used to work in shock and vibration analysis (I ran a lab) one of
the classic stories is what Ford found out RE shipping cars. The
HARDEST thing on wheel bearings turns out to be shipping cars on
trucks/trains etc. The shock/vibration on the roller bearings (and
holds true for ball bearings too) that are stationary turns out to be
the biggest load on a car wheel bearing, and it hold true for any
other 'normal' use. The hardest thing on a rotor/trust bearing is
that it sits there, parked, with the vibration/shock of wind loading
pounding the balls into the race, and of course the same spot on the
balls and race.
IF you go old school, this is where bronze and Babbit bearings shined
(there is a reason con rods are still babbit). Today, the answer for
a lot of applications is, guess what? Engineering plastics...
--
Charlie
www.baysidephoto.com
www.thegallos.com
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