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Half Nut Lever
The half nut lever engages the carriage with the
leadscrew which moves the cutting tool along the
length of the workpiece.
Thread Dial & Chart Overview
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 knurled hand knob on the thread dial, pivot the
dial gear into mesh with the leadscrew, then tighten
the hand knob, (see Figure 93).
Using Thread Dial and Chart (Metric)
Find the length of each thread that you want to cut
in the left column (see Figure 55), then reference
the dial number to the right of it. The dial numbers
indicate when to engage the half nut for a speci
fi
c
thread pitch. The thread dial chart can also be found
on the front of the thread dial housing.
Feed Control
Lever
Half Nut Lever
Down & Engaged
Figure 54. Carriage controls set up for threading.
Hand Knob
Dial Gear
Leadscrew
Figure 45. Thread dial engaged with the
leadscrew.
Length of each thread 1.75, 3.5, 7, 14
Select position 1, 3 on the thread dial and use the 14T
gear on the buttom of thread dial for threading length
of each thread 1.75, 3.5, 7, 14. (Figure 56 - 57)
Figure 55. Thread dial chart (Metric).
Figure 56. Thread dial chart of
numbered position 1, 3.
Figure 57. Example of thread dial - 14T.
Figure 55. Feed control lever and half nut
positions for threading.
