disturbing the final position of the tools. For turning a
duplicate part, the tools are simply brought to the same position by
turning the feed screws until the clips and stationary pointers again
coincide. For setting tools on other faces of either turret, this
operation is repeated, except that clips are used bearing numbers
corresponding to the turret face in use.

The main turret of this machine has five holes in which are inserted the
necessary boring and turning tools, drills or reamers, as may be
required. By having all the tools mounted in the turret, they can be
quickly and accurately set in the working position. When the turret is
indexed from one face to the next, binder lever _N_ is first loosened.
The turret then moves forward, away from its seat, thus disengaging the
indexing and registering pins which accurately locate it in any one of
the five positions. The turret is revolved by turning crank _M_, one
turn of this handle moving the turret 1/5 revolution or from one hole to
the next. The side-head turret is turned by loosening lever _O_. The
turret slide can be locked rigidly in any position by lever _P_ and its
saddle is clamped to the cross-rail by lever _Q_. The binder levers for
the saddle and toolslide of the side-head are located at _U_ and _V_,
respectively. A slide that does not require feeding movements is locked
in order to obtain greater rigidity. To illustrate, if the main tool
slide were to feed vertically and not horizontally, it might be
advisable to lock the saddle to the cross-rail, while taking the
vertical cut.

[Illustration: Fig. 17. Turning a Gear Blank on a Vertical Turret Lathe]

The vertical slide can be set at an angle for taper turning, and the
turret is accurately located over the center of the table for boring or
reaming, by a positive center stop. The machine is provided with a brake
for stopping the work table quickly, which is operated by lifting the
shaft of pilot-wheel _A_. The side-and cross-rails are a unit and are
adjusted together to accommodate work of different heights. This
adjustment is effected by power on the particular machine illustrated,
and it is controlled by a lever near the left end of the cross-rail.
Before making this adjustment, all binder bolts which normally hold the
rails rigidly to the machine column must be released, and care should be
taken to tighten them after the adjustment is made.

[Illustration: Fig. 18. Turning Gasoline Engine Flywheel