Model g0554z (Mfg 01/09+)
-47-
to use the thread dial chart (see
Figure 65), find
the tpi (threads per inch) on the chart that you
want to cut, then reference the dial number to
the right of it. the dial numbers indicate when to
engage the half-nut for a specific thread pitch.
Note:
The thread dial chart can also be found on
the front of the thread dial housing.
For example, to cut a tpi of 11, engage the half-
nut when the thread dial points to any number
between 1 and 4. to cut a tpi of 4
1
⁄
2
, engage the
half-nut on 1 or 3.
to maintain accuracy and consistency, engage
the half-nut on the same thread dial number for
each pass. Failure to start on the same number
each time may lead to cutting off the thread made
in the previous pass.
Note:
The thread dial is not used when cutting
metric threads. Leave the half-nut engaged from
the beginning until the threads are complete.
thrEAd diAl
t.p.i
diAl
4
5
6
1-4
7
8
9
10
11
12
13
14
16
18
20
22
23
24
26
28
32
36
40
44
46
48
52
56
64
72
80
88
92
96
104
112
4-1/2
5-1/2
1 or 3
6-1/2
1-1/2
5-3/4
1
Figure 65. Model g0554z thread dial chart.
