Section III. AXLES AND JOURNALS
4-18 the same data for passenger-car axles. When new
passenger-car axles are used on new cars in passenger
car service, the load rating of the individual axles should
a. The standards for axle design and dimensions are
based on load ratings, which in turn are fixed by journal
selected in accordance with the tables shown in figure 4-
dimensions for plain bearing freight-car axles, and figure
Table 4-1. Axleload Ratings
(Figure 2A.3 PB-AAR Wheel Manual)
Figure 4-17. New and limiting dimensions for plain bearing freight-car axles.
b. Common Defects. Cited below are short, general
defeat, if allowed to remain, may cause a broken axle or
a hot journal.
descriptions of various common axle and journal defects
(2) Bent axle. All secondhand dismounted axles
and recommended practices.
(1) Cut or burnt journal. A depression, continue-out
should be checked in the lathe or between centers for
rotundity, concentricity, and taper of
streak, or an injury to the surface of the metal of wheel
seats or journals, such as cut journal, must not be
removed except by a machine cut in a lathe. Such a