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Re: Technical Discussion About Axle Journal Bearings

Posted by aem7ac on Sun Oct 12 11:56:33 2008, in response to Re: Technical Discussion About Axle Journal Bearings, posted by Train Dude on Sat Oct 11 22:32:44 2008.

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My main concern is that catastrophic inboard bearing failure may not be "seen" by a hotbox detector

wasnt the m-7 and m-8's ordered (at least, the specs were finalized) long before njt had their incident?

does anyone have a viable inboard bearing design right now? the only one i can think of in a commuter rail application are the ones on the comet derivative cars. everyone else seem to have an outboard bearing design, including many of the japanese manufacturers.

the boston red line cars have inboard bearing in a subway application. as far as i know, they don't have a reputation for being a maintenance problem. but redline has always had inboard bearing trucks ever since the days of the SOAC.

of course, not being a mech-e, i don't have any information about this other than what i observe by casually looking at equipment.



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