
LAYSHAFT GEARBOXES 257
transfer input gear. It may receive additional support
from an outrigger bearing in the rear wall of the
transfer box.
Intermediate shaft and gears Similar to the layshaft
cluster of some gearboxes, it comprises a fixed spindle
with needle roller bearings upon which rotate an
integral idler gear and pinion.
Transfer output shaft and gears This assembly com-
prises a main and an extension shaft in series with a
spigot bearing between them. The main shaft
is
typically
supported in tapered roller bearings, which are located
either side of a pair of high- and low-speed gears that
are normally free to revolve upon the mainshaft ...