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Each shaft has room to mount gears in two posi-
tions—forward and rear (see Figure 69).
Forward
Gears
Spacer
9 10 11 12 13 14 16 18
A
B
53
57
55
C D
80 80
72 80
72
E F
30
30
33 40
19 20 22 24 32 40 44
A
B
53
53
60
C D
80
63
80 60
7153 55
E F
50
50
55
Blank Area Indicates
Spacer (Not Shown)
Rear
Forward
Figure 69. Identification of forward and rear gear
positions.
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.
Because there is only one spacer, on some
setups smaller gears must be used as spac-
ers on the adjustable gears.
Model G0768/G0769 (Mfd. Since 8/15)
Rear
Gears
57 72
63
72
57
70 40
60
40
60
40
60
63
65
70
80 60
53 72
63
70
4030
55
33
55
30
80
80
80
80
The lines shown between the numbers in Figure
70 indicate which gears should be in mesh.
A
Gear Mesh
Lines
C D
E F
Figure 70. Lines between numbers indicate
gears that should be in mesh.
A
For example, to set the lathe to cut 9 TPI (threads
per inch), mesh the 80T (C) gear with the 53T (A)
C D
and 30T (E) gears.
E F
End Gears
This section explains how to configure end gears
for power feeding and threading operations.
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.
0.0037"
A
B
84
30 72
C
D
20
80
E
F
80
F (Spacer)
E Gear
Figure 71. Power feed change gear
configuration.
9 10 11 12
53
57
55
B
80 80
72 80
30
30
19 20 22 24
B
53
53
60
80
63
80 60
71 53 55 4
50
50
A Gear
40
B Gear
0.0068"
30
B
C Gear
33 80
D
80
D Gear
F
-51-
57 7
72
70 4
33 40
53 7
55
80
A
C
E
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