End Gears
The end gears must be correctly setup for power feed and threading. Use the photo below to identify the A, B, C, and D change gears, which are also referenced on the headstock feed rate gear chart.
Primary Threading Configuration
This threading configuration is used for inch and metric threading. Mesh the A, B, and D gears, as shown in Figure 56. The C gear does not mesh with any other gears in this configuration, so it is not important which gear is installed in the C posi- tion. The B and C gears share a keyed bushing.
A
B
C
D
A 
B
C
D 
A
Gear
B
Gear
C
Gear
D
Gear
Figure 54. Change gear identification.
The following subsections explain how to config- ure the end gears, which are accessed by remov- ing the end cover.
Power Feed Configuration
The end gears are preset by the factory in this configuration, which is only used for power feed- ing. Mesh the top 20T A gear with the 80T B gear,
Figure 56. Primary threading configuration.
Secondary Threading Configuration
This threading configuration is used for a different range of threads and feed rates than the primary threading configuration. Mesh the A and B gears, and mesh the C and D gears, as shown in Figure 57. The B and C gears share a keyed bushing.
and mesh the 20T C gear with the 80T D gear (see Figure 55).
A 
A Gear
A(20T)
B(80T)
C(20T)
D (80T)
A Gear | B Gear |
(20T) | (80T) |
C Gear |
|
(20T) |
|
B
C 
D 
B
Gear
C |
| D |
Gear |
| Gear |
|
|
|
D Gear |
(80T) |
Figure 57. Secondary threading configuration.
Figure 55. Power feed end gear configuration.
Model G0765 (Mfd. Since 12/13) |