27
27
The example feed rate charts to the right show some of the
more typical settings that might be used. The chart in (fig. A)
shows threads per inch while the chart in (fig. B) shows
distance between threads in (mm).
Besides changing the selection knobs, you may also need to
change gears, labeled “a” and “b” in the diagram(s). The
values in the chart(s) for lines “a” and “b” indicate the number
of gear teeth.
Note: Each gear has the number of teeth
stamped on its face for easy identification.
Important:
Make sure to use the actual charts on
your lathe to determine the correct thread settings.
As an example, we will pick 11½ th’ds/in. from the chart.
Projecting up in the chart shows “a” as a 40T gear and “b” as
a 46T gear. The quick-change selection knobs should be set
at 1, V, B, & D.
The lower left chart shows the longitudinal and cross feed
values in (mm) and the lower right chart shows the values in
(inches).
To perform a longitudinal cut in inches, we use
.0205”/revolution as an example.
Gear “a” will need to be changed to 60 Tooth.
Change the selection knobs to B, D, and R.
If using the metric chart, the procedure would be the same.
This symbol indicates longitudinal feed.
This symbol indicates cross feed rates.
figure A
figure B
a
60T
120T
a
A
B
A
B
D
D
C
C
3mm
LEVER T S R V T S R V
mm
60T
30T
1.392
.380
.696
.348
.094
.174
.047
.188
1.300
.351
.650
.176
.325
.088
.162
.044
1.044
.282
.522
.141
.261
.070
.130
.035
.835
.226
.418
.113
.208
.056
.104
.028
.696
.188
.348
.094
.174
.047
.087
.024
.650
.175
.325
.088
.162
.044
.081
.022
.522
.141
.261
.070
.130
.035
.065
.017
.418
.113
.208
.056
.104
.028
.052
.014
T
1"
a
b
120T
60
60
4
V
4
16
32
60 60 60 40 40 56 40 60
54 57 60 44 46 54 52 63
1 1 1 1 1 2 1 3
V V V V V V V V
4
1
2
5 5
6 6
7
1
2
1
2
8
9
1
2
1
2
9
10 11
12 13 14
18
36
19
38
20
40
22
44
23
46
24
48
26
52
28
56
a
b
A
B
A
B
D
D
C
C
mm
a
b
120T
56
60
4
R
60 60 30 60 60 30 60 56
63
1 3 4 1 3 1 3 3
R S T V R T V V
a
b
A
B
A
B
D
D
C
C
127T
60 60 60 60 60 60 60
5
a
60T
120T
a
A
B
A
B
D
D
C
C
8TPI
LEVER T S R V T S R V
ins
60T
30T
.0548
.0187
.0274
.0137
.0047
.0069
.0024
.0094
.0512
.0175
.0256
.0087
.0128
.0044
.0064
.0022
.0411
.0140
.0205
.0070
.0102
.0035
.0051
.0017
.0328
.0112
.0164
.0056
.0082
.0028
.0041
.0014
.0274
.0094
.0137
.0047
.0069
.0024
.0034
.0012
.0256
.0087
.0128
.0044
.0064
.0022
.0031
.0011
.0205
.0070
.0102
.0035
.0051
.0017
.0025
.0009
.0164
.0058
.0082
.0028
.0041
.0014
.0020
.0007
Summary of Contents for PL-1340E-1.0
Page 48: ...45 45 ELECTRICAL DIAGRAM...