fractional Tpi: Use any opposing number
pairs—1/3 or 2/4 on the thread dial (see example
in figure 95).
1,3 or 2,4
figure 95. Example of opposing number groups
important: Once a number has been selected,
continue using that number or its odd/even
if you use 1 during the first threading pass,
then you must select 1 or 3 for all following
if you use 2 during the first threading pass,
then you must select 2 or 4 for all following
fractional Tpi: Use position 1 on the
thread dial (see example in figure 96).
figure 96. Example of
the following subsection describes how to set up
the lathe for diametral or modular pitch turning.
if you are unfamiliar with the process of turning
pitches on a lathe, we strongly recommend that
you read books, review industry trade magazines,
or get formal training before attempting specific
Headstock pitch Turning controls
the pitch turning charts on the headstock face
display the settings for diametral and modular
pitch turning, as shown in figure 97.
figure 97. location of modular and diametral
Using the controls on the lathe, follow the exam-
ple below to understand how to set up the lathe
for the desired pitch turning operation.
To set levers and dials for 1.25 Mp:
Configure the gears as instructed in Alternate
configuration on page 55.
Model G0746/G0749 (Mfg. Since 3/13)