Jet BD-920N - Carriage Assembly; Apron Assembly

Carriage
The carriage is made from high quality cast iron. The
sliding parts are smooth ground. (Fig. 5) They fit the V
on the bed without play. The lower sliding parts can be
easily and simply adjusted. The cross slide is mounted
on the carriage and moves on a dove tailed slide. Play in
the cross slide may be adjusted with the gibs.
Move the cross slide with it's conveniently positioned
handwheel. There is a graduated collar on the
handwheel. One graduated mark equals 0.0254
millimeters or 0.001 inches. (Fig. 6)
The top slide, mounted on the cross slide, can be rotated
360°. The top slide and the cross slide travel in dove
tailed slides and have gibs, adjustable nuts, and
graduated collars.
A four way tool post is fitted on the top slide. The four
way tool post can be converted to a single tool holder
with parts enclosed in the tool box. (Fig. 6)
For accurate facing operations, the carriage can be
locked by tightening the hex socket cap screw.
(A, Fig. 7) '
Apron
The apron is mounted on the bed. A half nut is fitted to
the apron. The half nut gibs can be adjusted from the
outside.
The half nut is engaged by the half nut lever. A rack,
mounted on the bed, and a pinion operated by
handwheel on the carriage allow for quick travel of the
apron. (Fig. 8)
5
Fig. 8