South Bend Tools
South Bend Tools
For Machines Mfd. Since 7/19
Model SB1065F–SB1071F
-37-
O P E R A T I O N
Odd Numbered (TPI)
Use
1
,
2
,
3
,
4
positions on the thread dial when
cutting odd threads (see Figure 57).
Figure 57. Thread dial positions for odd threads.
Figure 57. Thread dial positions for odd threads.
3, 5, 7, 9, 11,
13, 15, 19, 23
1, 2, 3, 4
TPI
TPI
1
⁄
4
Fractional Thread (TPI)
Use
1
on the thread dial when cutting
1
⁄
4
fractional threads (see Figure 55).
Figure 55. Thread dial positions for
Figure 55. Thread dial positions for
1
⁄
4
fractional
fractional
threads.
threads.
2¼, 2¾,
2
7
∕
8
,
3¼
1 Only
TPI
TPI
1
⁄
2
Fractional Thread (TPI)
Use
1
and
3
on the thread dial when cutting
1
⁄
2
fractional threads (see Figure 56).
Figure 56. Thread dial positions for
Figure 56. Thread dial positions for
1
⁄
2
fractional
fractional
threads.
threads.
2½, 3½, 4½,
7½, 11½, 13½
1 or 3
TPI
TPI
Find the TPI (Threads Per Inch) that you want
to cut in the left column of the thread dial chart
(see Figure 53), then reference the dial numbers
to the right of it. The dial numbers indicate when
to engage the half nut for a specific thread pitch.
The thread dial chart can also be found on the
front of the thread dial housing.
Figure 53. Thread dial chart.
Figure 53. Thread dial chart.
Note:
The thread dial is not used for metric
threading, or diametral and modular pitches.
With these, you must leave the half nut engaged
until the turning is complete.
The following examples explain how to use the
thread dial chart for inch threads.
Even Thread (TPI)
Use any position shown on thread dial when
cutting even threads (see Figure 54).
Figure 54. Thread dial positions for even threads.
Figure 54. Thread dial positions for even threads.
TPI
TPI
2, 4, 6, 8,10,12
14,16,18,20,22
24,26,28
All 8
Inch-Thread Dial Chart
Positions:
Positions:
Positions:
Positions:
Positions:
Positions:
Positions:
Positions:
Summary of Contents for Oil Country Series
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