cutter is set to turn
the flange to the proper diameter for the roughing cut. The turret slide
is fed forward and back while the cutter is adjusted, and when it is
properly set, the flange is turned, the cam-drum being fed by hand. This
is the first trial cut on the piece.

A facing tool, shown in the working position in Fig. 36, is placed at
this station of the turret, being held in the turret hole. This tool has
a pilot bar and a holder which contains a facing blade. Feeding by hand,
as before, the tool is adjusted lengthwise so as to rough-face the work
to the dimension desired. In a similar way the finish-turning and
facing tools for the second position of the turret are set, the
cam-shaft being revolved by hand to bring this second face and second
cam into the working position. (The finish-facing tool is not shown in
place in Fig. 36.)

[Illustration: Fig. 38. Diagram of Cross-slide Cams and Feeding
Mechanism]

=Setting the Cross-slide Cam.=--As previously mentioned, the third
turret face has no tool, the cutting off of the collar being done during
this part of the cycle of operations. It has been taken for granted that
in setting the turret slide, room has been left between it and the chuck
for the cross-slide. The cross-slide is clamped in a longitudinal
position on the bed, convenient for the cutting-off operation, which is
done with a tool _D_ (Fig. 36) in the rear toolpost, thus leaving the
front unobstructed for the operator. When both forming and cutting off
are to be done, the forming tool is generally held at the front and the
cutting-off tool at the back because heavier and more accurate forming
can be done with the work revolving downward toward a tool in the front
toolpost, than with the tool at the rear where it is subjected to a
lifting action.

The arrangement of the cross-slide cams is shown in Fig. 38, which is an
end view of the large drum _E_, Fig. 32. The rear feed cam is the one to
be used, and since this cutting-off operation is a short one, it may be
done during the return of the turret for position No. 3. The cam drum
is, therefore, rotated by hand until the turret face No. 3 has begun to
return. The cross-slide cams are then loosened and the rear feed cam is
swung around to just touch the roller _R_ which operates arm _A_, the
cross-slide having been adjusted out to nearly the limit of its forward
travel, leaving approximately enough movement for cutting off the
collar. The rear feed