End Gears
The end gears must be correctly setup for power feed, threading, and pitch turning. Use the photo below to identify the upper Z1 combination gear, middle 36T and 72T change gears, and lower Z2 combination gear, which are also referenced on the headstock feed, threading, and pitch turning charts.
| 72T Change |
| Gear |
Z1 |
|
Combination | Z2 |
Gear | Combination |
| Gear |
36T Change |
|
Gear |
|
Figure 79. Change gear identification.
The following subsections explain how to config- ure the end gears, which are accessed by opening the
Primary Configuration
The primary configuration is used for inch and metric threading and power feeding. Mesh the small Z1 gear with the 72T gear, and mesh the large Z2 gear with the 36T gear (see Figure 80).
Z1 | Z1 Gear |
| 72T |
| Gear |
72T | 36T |
| Gear |
36T |
|
Z2 | Z2 Gear |
|
Figure 80. Primary change gear configuration.
Model G0746/G0749 (Mfg. Since 3/13)
Secondary Configuration
The secondary configuration is used for a differ- ent range of threads and feed rates than the pri- mary configuration. Mesh the large Z1 gear with the 36T gear and the small Z2 gear with the 72T gear, as shown in Figure 81.
Z1 | Z1 Gear | |
72T | ||
| ||
| Gear | |
| 36T | |
| Gear | |
36T |
| |
72T |
| |
| Z1 Gear | |
Z2 |
|
Figure 81. Secondary change gear
configuration.
Alternate Configuration
The alternate end gear configuration is used when cutting modular or diametral pitches. The small Z1 and Z2 gears are positioned so they mesh with the 72T gear, as shown in Figure 82.
Z1 | Z1 Gear |
|
|
| |
|
| 72T |
72T | 36T | Gear |
Gear |
| |
|
| |
36T |
|
|
Z2 | Z1 Gear |
|
|
|