from
The Collaborative International Dictionary of English v.0.48
Axle box \Ax"le box`\
1. A bushing in the hub of a wheel, through which the axle
passes.
[1913 Webster]
2. The journal box of a rotating axle, especially a railway
axle.
[1913 Webster]
Note: In railway construction, the axle guard, or pedestal,
with the superincumbent weight, rests on the top of the
box (usually with a spring intervening), and holds it
in place by flanges. The box rests upon the journal
bearing and key, which intervene between the inner top
of the box and the axle.
[1913 Webster]