-46-
Model g0554z (Mfg 01/09+)
NOTICE
DO NOT engage the half-nut when the
spindle speed is over 325 RpM. Otherwise,
damage to the half-nut, leadscrew, or car-
riage components may occur.
the purpose of this subsection is to orient you
with the controls used when threading and how to
use the threading dial.
if you are unfamiliar with threading on a lathe, we
strongly recommend that you read books, review
industry trade magazines, or get formal training
before beginning any threading projects.
power Feed Lever
the power feed lever must be in the disengaged
(horizontal) position for threading operations or
the half-nut will not engage with the leadscrew
(see
Figure 63).
Threading controls
Thread Dial & chart
the numbers on the thread dial are used with
the thread dial chart to show when to engage the
half-nut during inch threading. the thread dial
gear must be engaged with the leadscrew for this
to work. loosen the cap screw that secures the
thread dial, then pivot it so that the dial gear mesh-
es with the leadscrew, as shown in
Figure 64.
Half-Nut Lever
the half-nut lever engages the carriage with the
leadscrew which moves the cutting tool along the
length of the workpiece (see
Figure 63).
Figure 63. Carriage controls set up for
threading.
power Feed lever
horizontal &
disengaged
half-nut lever
down & Engaged
Figure 64. thread dial engaged with the
leadscrew.
leadscrew
Cap screw
dial gear