Threading
The following subsections will describe how to use the threading controls and charts to set up the lathe for a threading operation. If you are unfamil- iar with the process of cutting threads on a lathe, we strongly recommend that you read books, review industry trade magazines, or get formal training before attempting any threading projects.
Headstock Threading Controls
The threading charts on the headstock face dis- play the settings for inch and metric threading.
Using the controls on the lathe, follow the exam- ple below to understand how to set up the lathe for the desired threading operation.
To set levers and dials for 16 TPI:
1.Configure the gears, as instructed in the End Gear Configuration Example on Page 56.
2.Locate 16 TPI on the inch threading chart shown in Figure 86.
Lever & Dial Positions |
| |
G Dial | F Lever | |
Position | ||
Position | ||
| ||
16 TPI |
| |
E Lever Position |
|
Figure 86. 16 TPI and corresponding lever and
dial positions.
3.To the left of 16 TPI, locate the E lever in the 2 position. Above 16 TPI, locate the F lever position and the G dial position—which will be set to 1 (see Figure 86).
Note: In the next step, use the chuck key to rock the spindle
4.Position the gearbox levers and dials, as shown in Figure 87.
F Lever |
|
| E Lever | |
Position |
|
| Position | |
G Dial |
|
|
| |
Position |
|
|
| |
|
|
|
| Selection |
|
|
|
| Lever |
mm |
| ˶ | 3 2 1 | |
|
| |||
|
| F |
| E |
| Lever |
| Lever | |
|
| G |
|
|
| 1 | 1 |
| Leadscrew (UP) |
| 1 | 2 |
|
|
1 | 0 |
| 3 |
|
|
|
|
| |
9 |
|
| 4 |
|
| 8 |
| 5 |
|
| 7 | 6 |
|
|
|
| G |
| Feed Rod (DOWN) |
|
|
|
| |
| Dial |
| Selection Lever | |
Figure 87. Lever and dial settings for 16TPI.
5.Move the leadscrew feed rod selection lever up.
The lathe is now set up to cut 16 TPi threads.
Model G0746/G0749 (Mfg. Since 3/13) |
