Model G0768/G0769 (Mfd. Since 8/15)
-51-
Because there is only one spacer, on some
setups smaller gears must be used as spac-
ers on the adjustable gears.
Both positions must be filled for the gears to work
properly. This also applies to the "blank" areas on
the chart, such as the one left of the 50T (F) gear
shown in
Figure 69. A spacer should be installed
in this position on the shaft. A spacer is not listed
because chart only reflects ACTIVE gear posi-
tions.
Each shaft has room to mount gears in two posi-
tions—forward and rear (see
Figure 69).
Forward
Gears
Rear
Gears
Spacer
A
C D
B
E F
A
C D
B
E F
30
19 20 22 24 32 40 44
80 80
30
33 40
65
70
80 60
60
60
60
63
63
53
9 10 11 12 13 14 16 18
50
50
55
80
80
80
80
80
8060
60
7153 55
33
30
55
55
4030
53
53
53 72
63
70
57
57 72
72
72
72 80
70 40
40
40
63
57
55
Figure 69. Identification of forward and rear gear
positions.
Forward
Blank Area Indicates
Spacer (Not Shown)
Rear
This section explains how to configure end gears
for power feeding and threading operations.
End Gears
Power Feed Configuration
The end gears are preset by the factory in this
configuration, which is used for power feeding.
Mesh the B and D gears and the C and E gears
(see
Figure 71). A spacer (F) is installed on the
lower shaft behind the E gear.
Figure 71. Power feed change gear
configuration.
0.0037"
84
20
A
A
40
C
C
D
D
B
B
E
E
F
F
80
80
80
30 72
33 80
30
0.0068"
E Gear
F (Spacer)
D Gear
C Gear
B Gear
A Gear
The lines shown between the numbers in
Figure
70 indicate which gears should be in mesh.
A
C D
B
E F
A
C D
B
E F
30
19 20 22 24 32 40 44
80 80
30
33 40
65
70
80 60
60
60
60
63
63
53
9 10 11 12 13 14 16 18
50
50
55
80
80
80
80
80
80 60
60
7153 55
33
30
55
55
4030
53
53
53 72
63
70
57
57 72
72
72
72 80
70 40
40
40
63
57
55
Figure 70. Lines between numbers indicate
gears that should be in mesh.
Gear Mesh
Lines
For example, to set the lathe to cut 9 TPI (threads
per inch), mesh the 80T (C) gear with the 53T (A)
and 30T (E) gears.
