Model G0750G (Mfg. Since 11/12)
-53-
The following subsections will describe how to
use the threading controls and charts to set up the
lathe for a threading operation. If you are unfamil-
iar with the process of cutting threads on a lathe,
we strongly recommend that you read books,
review industry trade magazines, or get formal
training before attempting any threading projects.
Headstock Threading Controls
The threading charts on the headstock face dis-
play the settings for inch and metric threading.
Using the controls on the lathe, follow the exam-
ple below to understand how to set up the lathe
for the desired threading operation.
To set dials for 18 TPI:
1. Install the 60T and 54T gears, as instructed in
the Gear Configuration Example on Page
52.
2. Locate 18 TPI on the inch threading chart
below.
Threading
Arm-Support
Hex Nut
Gear-Support
Hex Nut
60T Gear
54T Gear
120T Gear
127T Gear
Figure 79. 60T & 54T gears installed.
11. Rotate the 120T gear up against the 60T gear
until they mesh with 0.002" to 0.004" back-
lash.
12. Tighten the arm support hex nut.
13. Secure the arm support cap screw (see
Figure 77).
14. Re-install the end gear cover.
10. Slide the 120T gear against the lower 54T
gear (see Figure 79) until they mesh with
0.002" to 0.004" backlash, then tighten the
gear support hex nut.
Figure 80. 18 TPI and corresponding dial
positions.
1 & V
Dials
18 TPI
A & C
Dials
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