Model SB1001 8K™ Lathe | O P E R A T I O N | For Machines Mfg. Since 8/11 |
Thread Dial Chart
Find the TPI (threads per inch) that you want to cut in the left column of the thread dial chart (see Figure 64), 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. The thread dial chart can also be found on the front of the thread dial body.
in.
16, 24, 32 | Any Position |
Any
12, 20, 28 Numbered
Position
12, 20, or 28 TPI
For each of these thread pitches, use any numbered position (2 or 4) on the thread dial (see Figure 66).
| TPI | ' | ) | |
| ' | |||
|
|
| ||
| Any | ) | ) | |
12, 20, 28 | Numbered | |||
| ||||
| Position |
| ' |
Figure 66. Any numbered position on the dial for
threading 12, 20, or 28 TPI.
10, 14, 18
2 Only
10, 14, or 18 TPI
or 4 Only
11, 13, 19 | 4 Only |
Figure 64. Thread dial chart.
Note: The thread dial is not used for metric
The following examples explain how to use the thread dial chart for inch threads.
For each of these thread pitches, use only the 2 positions or only the 4 positions (see Figure 67).
TPI | ' | ) | |
' | |||
| |||
|
| ||
2 Only | ) | ) | |
10, 14, 18 |
| ||
or 4 Only |
| ' |
Figure 67. Only the 2 positions or only the 4 positions
on the dial for threading 10, 14, or 18 TPI.
16, 24, or 32 TPI
For each of these thread pitches, use any line on the thread dial (see Figure 65).
TPI | ' | ) |
' | ||
|
| |
16, 24, 32 | Any Position | ) |
| ) | |
|
| |
|
| ' |
Figure 65. Any line on the dial for threading 16, 24, or
32 TPI.
11, 13, or 19 TPI
For each of these thread pitches, use only the 4 positions on the thread dial (see Figure 68).
TPI |
| ' | ) |
| ' | ||
|
|
| |
11, 13, 19 | 4 Only | ) | ) |
| |||
|
|
| |
|
|
| ' |
Figure 68. Only the 4 positions on the dial for
threading 11, 13, or 19 TPI.
When threading, we recommend using the slowest speed possible and avoiding deep cuts, so you can more easily disengage the half nut to prevent an apron crash!
