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g9249 12" x 37" Belt drive gap Bed lathe
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figure 61. inch thread chart.
mm
120
127
40
40
127
40
120
120
32
32
30
127
1
4
6
1
6
1
4
A
B
C
D
E
METRIC THREAD TABLE
INCH THREAD TABLE
6
4.8
4
7.5
5
4.5
3
2.4
2
2.5 2.25 1.8
1.5 1.2
1
1.25
0.9
0.75 0.6 0.5
0.45
0.3 0.25
3.75
T.P.I.
127
32
30
A
B
C
D
E
127
32
46
1
3
/
4
11
1
/
2
3
3
/
4
7
1
/
2
23
15
46
92
30
60
FEEDING TABLE
mm
/
inch
127
40
40
D
E
1 2 3 4 5 6 7 8
.42
.37
.35
.33
.30
.28
.26
.24
.0165 .0146 .0138 .0131 .0120 .0110 .0101 .0094
.210
.185
.175
.165
.150
.140
.130
.120
.0082 .0073 .0069 .0065 .0060 .0055 .0050 .0047
figure 60. Metric and additional inch thread
chart.
8. the thread dial is unnecessary for cutting
metric threads. leave the half nut engaged
until the threads are complete.
9. set the tool tip perpendicular to the workpiece,
center it vertically, and line up the tool for the
initial cut.
thread charts
10. turn ON the spindle and engage the half
nut according to the thread dial to cut your
threads.
NOTICE
DO NOT engage the half-nut when the spin-
dle speed is over 200 RPM. Disregarding this
notice may cause damage to the leadscrew
or carriage components.