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Old 01-22-2021, 05:37 AM   #61
gearhead
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Join Date: Jul 2013
Location: Liberty, Texas
Posts: 5,034
Quote:
Originally Posted by chuckster57 View Post
I don’t use air on bearings but I have a question:

If using air will spin the roller faster than designed, has there ever been a study that determines the max RPMs a roller can do? And what would the MPH of the vehicle be?

Just askin
That's one of my fascinations of race cars. What size bearings are normally found on NASCAR or F1 cars? 200+ MPH and heavy loaded under acceleration and braking. I'm familiar with turbines and centrifugal compressors running 14,000+ RPM on plain bearings but don't recall any equipment with ball bearings over 5,000 RPM. A Sundyne gearbox may be the exception. They had an output of 20,000 RPM+.
So what RPM is a NASCAR tire turning at 210MPH??
edit add: If our planned Spring trip happens we will be close to the Richard Childress NASCAR shop. If I can find a couple hours for a tour I'll try to find someone to ask that question of bearing size.
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