-56-
Model G0824 (Mfd. Since 12/16)
Thread Dial
Tools Needed
Qty
Hex Wrench 6mm .............................................. 1
The numbers on the thread dial are used with the
thread dial chart to show when to engage the half
nut during inch threading. Loosen the cap screw
on the thread dial (see
Figure 84), pivot the gear
teeth so they mesh with the leadscrew threads,
then re-tighten the cap screw.
Note: The thread dial is not used for metric
threading. You must leave the half nut engaged
from the beginning until the turning is complete for
this type of operation.
When threading, we recommend using the
slowest speed possible and avoiding deep
cuts, so you are able to disengage the half
nut when required and prevent an apron
crash!
When the first thread cutting pass is complete,
the operator disengages the carriage from the
leadscrew using the half nut lever. The operator
returns the carriage for the next pass and re-
engages the half nut using the same thread dial
setting to resume the cut in the previous pass.
Figure 84. Thread dial engaged with the
leadscrew.
Cap Screw
Leadscrew
Dial Gear
Teeth
Thread Dial Chart
The thread dial chart is located on the headstock
in front of the chuck, as shown in
Figure 85.
Figure 85. Locations of thread dial chart and
thread dial.
Thread Dial
Chart
Thread
Dial
To use the thread chart, find the TPI that you want
to cut and reference the "Scale" number(s) next to
it. The scale number(s) indicate when to engage
the half nut when cutting that TPI.
For Example: If you are cutting 13 TPI threads,
the chart shows "1, 3, 5, 7" next to the 13 (see the
shaded boxes in
Figure 86).
Figure 86. Thread dial chart.
Important: You can engage on the number 1 on
the thread dial to cut any thread if you do not want
to use the chart, or if you forget any of the rules
on the next page.
