leaving 0.003"–0.005" backlash between
gear teeth, arrange the change gears to
match the order under "F" (see figure 55).
figure 55. Change gear and chart relationship.
rotate the spindle by hand to verify no bind-
ing exists, and re-install the gear cover.
Move the threading dials to the combination
of fbSW6, as shown in figure 56.
figure 56. thread control settings for 0.75 pitch.
feed Direction Lever
When threading, the feed direction lever (see
figure 57) moves the carriage to the left toward
the headstock (forward), and moves the carriage
to the right toward the tailstock (reverse). the
leadscrew will not turn when the feed direction
lever is in the neutral position.
figure 57. Feed direction controls for threading.
feed Selection Lever
to prevent apron and drive system damage, the
apron is equipped with an internal lockout, mean-
ing that in order to engage the half nut for thread-
ing, this lever (see figure 57) must be moved to
the central or the disengaged position. Also keep
in mind that just as with longitudinal feed opera-
tions, before any threading operation. you must
first verify the carriage lock (see figure 57) is
disengaged, or the feed system may be damaged.
Carriage lock disengaged
figure 58. Feed selection lever disengaged.
Model G0709 (Mfg. Since 5/11)