Figure 6-7.--Side view of a carriage mounted on the bed.
Before you insert a center or tooling into the
spindle, carefully clean the tapered shank and wipe
out the tapered hole of the spindle. After you put a
drill or a reamer into the tapered hole of the spindle,
be sure to tighten it in the spindle so that the tool will
not revolve. If the drill or reamer is allowed to
revolve, it will score the tapered hole and destroy its
accuracy. The spindle of the tailstock is engraved
with graduations that help in determining the depth of
a cut when you drill or ream.
CARRIAGE
The carriage carries the cross-feed slide and the
compound rest that, in turn, carries the cutting tool in
the toolpost. The carriage slides on the ways along
the bed (fig. 6-7).
Figure 6-8 shows a top view of the carriage. The
wings of the H-shaped saddle contain the bearing
surfaces, which are fitted to the V-ways of the bed.
The crosspiece is machined to form a dovetail for the
cross-feed slide. The cross-feed slide is closely fitted
to the dovetail and has a tapered gib that fits between
the carriage dovetail and the matching dovetail of the
Figure 6-8.--Carriage (top view).
cross-feed slide. The gib permits small adjustments
to remove any looseness between the two parts. The
6-6