Figure 3.3.
Journal Box Assembly With Friction Bearing.
(1) Journal--end of the axle, or the part of an axle on which the
journal bearing rests.
(2) Waste packing--cushioning made of fibrous material placed in the
bottom of the journal box.
Saturated with a lubricant, the packing feeds
the lubricant to the journal and bearing.
A commercial spring-type
lubricator pad has been substituted for waste packing on most U.S.
commercial railroads.
(3) Wedge--holds the bearing in place and distributes weight from the
side frame to the journals, through the wheels, to the rails.
(4) Bearing--device that provides a smooth working surface against
the journal. The friction bearing is a brass casting with a babbitt lining.
It transfers friction heat to the top of the journal box through which it
escapes to the atmosphere by the passage of cool air over the journal box.
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