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Re: Technical Discussion Train Dude not Knowing Vocabulary.

Posted by JournalSquare-K-Car on Mon Oct 13 18:05:08 2008, in response to Technical Discussion About Axle Journal Bearings, posted by Train Dude on Sat Oct 11 18:43:36 2008.

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Umm...I think you are confused. From what I know, all modern rail cars have roller bearings. Journal bearings are the simpler design where the metal axle goes into a hole, and there is oil there to lubricate it. An interesting thing is that journal bearings, if designed in the right way, can become fluid bearings at higher speeds, making them even better than roller bearings, but I don't think they have fluid bearings for such heavy trains. Though I think I read somewhere that low speeds are not good for journal "friction" bearings, but I am not sure.

As for inboard VS outboard; I have asked that question here before with no responses, so I will see what people have to say about it here.

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