Re: Truck bearings: Solid vs. RB

Anthony Thompson <thompson@...>

Dave Evans wrote:
The Mechanical Engineer's definition of "journal" is that portion of the shaft that rotates within a bearing, AND the relative motion between the two is sliding. There is NO sliding motion in a roller bearing, so a roller bearing does not have a "journal".
I urge you to check any Car Builders Cyc in the period of this list. The definitions for railroad use are quite clear.

Tony Thompson Editor, Signature Press, Berkeley, CA
2906 Forest Ave., Berkeley, CA 94705
(510) 540-6538; fax, (510) 540-1937; e-mail, thompson@...
Publishers of books on railroad history

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