nd deflects it into the working
position. The upper diagram shows the position of the bar as it enters
the hole, and the lower one the position after it has entered the
bushing and is engaged in turning the recess. This bar is set in the
turret so that at the extreme forward travel of the turret slide, the
recess will be bored to the required length. The cutter must also be
adjusted to bore to the desired diameter. This completes the setting of
the cutting tools.

[Illustration: Fig. 39. Flexible Boring Tool used for Recessing a
Bushing in Automatic Chucking and Turning Machine]

=Adjustments for Automatic Feed and Speed Changes.=--The machine must
now be set to perform automatically the desired changes of spindle speed
and the fast and slow cam movements for the tools. After placing a new
piece of work in the machine (the first one having been completed in the
setting-up operation), the cam-shaft is revolved by hand until the
turning tool in turret face No. 1 is just about to begin its cut. The
control wheel _D_, Fig. 34, is rotated in its normal direction until the
next graduation marked "slow" is in line with an index mark on the base
of the machine. Then the nearest pin _M_ is moved up until it bears
against a tooth of the star wheel (previously referred to) and is
clamped in this position. The pin should now be in the proper location,
but to test its position, rotate the cam shaft backward by hand and
throw in the automatic feed; then watch the cut to see if the drum slows
down just before the tool begins to work. If it does not, the pin should
be adjusted a little, one way or the other, as may be required. (In
going over a piece of work for the first time, it is best to have the
feed set to the smallest rate, feed change handle _K_ being in position
No. 1.)

After the cut has been completed and the turret feed cam-roll is on the
high part of the cam, the power feed should again be stopped and the
handwheel revolved until the next graduation marked "fast" is opposite
the index mark. The next stop pin is then moved up until it just touches
the star wheel, where it is clamped in position. The feed being again
thrown in, the turret will be returned rapidly, indexed, and moved
forward for the second operation. After stopping the automatic movement,
the pins are set for this face, and so on for all the operations,
including that in which the cross-slide is used for cutting off the
finished collar.

As the first, se