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The following examples explain how to use
the thread dial and the thread dial chart.
TpI Divisible by 8: For threading a tpi divisible
by eight, use any line on the thread dial (see the
example in figure 86).
Table
T.P.I. SCALE
8
ALL
figure 86. Any position on dial for threading tpi
divisible by 8.
TpI Divisible by 4 & Not by 8: For threading a
tpi divisible by four but not by 8, use any num-
bered line on the thread dial (see the example in
figure 87).
Table
T.P.I. SCALE
4
1–4
figure 87. Example of an inch thread pitch
divisible by 4, not by 8.
Important: Once a number has been selected,
continue using that number or its odd/even
counterpart.
for example:
•
if you use 1 during the first threading pass,
then you must select 1 or 3 for all following
passes.
•
if you use 2 during the first threading pass,
then you must select 2 or 4 for all following
passes.
-56-
Thread Dial
3
1
Thread Dial
3
1
Odd Numbered TpI: For odd numbered tpi,
use only the number 1 on the thread dial (see the
example in figure 88).
Table
T.P.I. SCALE
5
1
figure 88. Example of an odd numbered inch
thread pitch.
Even Numbered TpI Not Divisible by 4 or 8:
For threading any even numbered tpi not divis-
ible by 4 or 8, use the numbers 1 and 3 (see the
example in figure 89).
Table
T.P.I. SCALE
6
1&3
figure 89. Example of even numbered inch
thread pitch not divisible by 4 or 8.
Model G0750G (Mfg. Since 11/12)
Thread Dial
3
1
Thread Dial
3
1
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