-42-
Model g0554z (Mfg 01/09+)
refer to the shaded areas of the illustration in
Figure 56 and the examples below to understand
the layout of the top chart.
TPI
in
1 2 3 4 5 6 7 8
40
40
127
120
A
B
A
A
B
C
D
C
D
C
D
E
F
E
F
4 4
1
⁄
2
5
6
7
5
1
⁄
2
5
3
⁄
4
6
1
⁄
2
8 9 10 11 11
1
⁄
2
12 13 14
16 18 20 22 23 24 26 28
32 36 40 44 46 48 52 56
64 72 80 88 92 96 104 112
.0294
.0261
.0235
.0214
.0205
.0196
.0181
.0168
.0147
.0131
.0117
.0107
.0102
.0098
.0090
.0084
.0073
.0065
.0058
.0053
.0051
.0049
.0045
.0042
.0042
.0038
.0034
.0031
.0030
.0028
.0026
.0024
.0021
.0019
.0017
.0016
.0015
.0014
.0013
.0012
.0103
.0091
.0082
.0075
.0072
.0069
.0063
.0059
.0051
.0045
.0041
.0036
.0036
.0035
.0031
.0030
.0025
.0023
.0020
.0019
.0018
.0017
.0015
.0015
.0014
.0013
.0011
.0010
.0009
.0009
.0008
.0008
.0007
.0007
.0006
.0005
.0005
.0004
.0004
.0004
25
50
127
120
40
32
120
127
40
40
120
127
30
40
120
127
MM
E
C
A
B
A
B
1
3
6
3
1
2
3
7.5
6
5
4.8 4.5
4
3.6
3.75 3
2.5 2.4 2.25
2
1.8
1.5 1.25 1.2
1
0.9
0.75
0.6
0.5 0.45
Figure 56. Example selection from the top chart.
Example A:
you need the cross slide to move at a rate of
0.0082 ipr (inches per spindle revolution). to set
the lathe up for this task, you will need to:
1. set the spindle speed that is correct for this
feed rate.
2. Find 0.0082 in the bottom triangles of the
chart.
Note:
The IPR in the top triangles are for
longitudinal movement of the carriage using
the leadscrew, and in the bottom triangles for
longitudinal or cross feed using the feed rod.
3. set the A–B feed rate lever on the headstock
to
A, as indicated on the left (refer to the
Setting Feed Rate controls on page 43 for
detailed instructions).
Note:
You may need to rock the spindle,
leadscrew, or feed rod back-and-forth by
hand to get the gears to properly engage.
4. set the C-F feed rate knob on the gearbox to
D, as indicated on the left.
5. set the numeric feed rate knob on the gear-
box to
3, as indicated in the top row.
6. set the quick change gears as indicated in
the left column. Both 40t gears will mesh with
the outer 127t gear (refer to
Quick change
Gears on page 44 for detailed instructions).
Example b:
you will be cutting 11 tpi (threads per inch). to set
up your lathe for this task, you will need to:
1. Find the row that contains the tpi of 11.
2. set the A–B feed rate lever on the headstock
to
A, as indicated on the left.
3. set the C-F feed rate knob on the gearbox to
c, as indicated on the left.
4. set the numeric feed rate knob on the gear-
box to
4, as indicated in the top row.
5. set the quick change gears as indicated in
the left column. the 25t and 50t gears will
mesh with the outer 127t gear.
Note:
Refer to
Threading
on
Page 46
for
further instructions on using your lathe to cut
threads.
the bottom chart for metric threading has a slight-
ly different layout than the top chart. For instance,
if you will be cutting a standard metric thread pitch
of 1.25, you would do the following:
1. set the A–B feed rate lever to A, as indicated
on the left.
2. set the C–F feed rate knob to E, as indicated
on the left.
3. set the numeric feed rate knob to 6, as indi-
cated in the upper row.
4. set the quick change gears as indicated in
the top row for that column.
Note:
For metric threading, the top quick
change gear meshes with the outer 127T
gear and the bottom gear meshes with the
inner 120T gear.
