5
PM-236 v4 -207.indd
E2
E3
A2
E4
E1
C3
C4
A5
D5
B5
0.53 0.35 0.3 0.22 0.0 0.098 0.078 0.075 0.062 0.049
0.030 0.026 0.025 0.024 0.09 0.07 0.05 0.04 0.02 0.009
0.305 0.27 0.262 0.244 0.202 0.96 0.56 0.49 0.24 0.099
0.059 0.052 0.050 0.048 0.039 0.034 0.030 0.028 0.024 0.08
0.62 0.542 0.524 0.489 0.406 0.392 0.34 0.299 0.249 0.99
0.8 0.05 0.0 0.095 0.078 0.067 0.06 0.058 0.048 0.036
.220 .084 .049 0.979 0.83 0.784 0.627 0.597 0.498 0.398
0.236 0.209 0.203 0.89 0.57 0.35 0.22 0.6 0.096 0.072
Movement per spindle revolution (mm)
E2
E3
A2
E4
E1
C3
C4
A5
D5
B5
0.0060 0.0053 0.0052 0.0048 0.0040 0.0039 0.003 0.0030 0.0024 0.009
0.002 0.000 0.000 0.0009 0.0007 0.0007 0.0006 0.0006 0.0005 0.0004
0.020 0.007 0.003 0.0096 0.0080 0.0077 0.006 0.0059 0.0049 0.0039
0.0023 0.0020 0.0020 0.009 0.005 0.003 0.002 0.00 0.0009 0.0007
0.024 0.023 0.0206 0.093 0.060 0.054 0.024 0.08 0.0098 0.0078
0.0046 0.004 0.0040 0.0037 0.003 0.0026 0.0024 0.0023 0.009 0.004
0.0480 0.0427 0.043 0.0385 0.0320 0.0309 0.0247 0.0235 0.096 0.057
0.0093 0.0082 0.0080 0.0074 0.0062 0.0053 0.0048 0.0046 0.0038 0.0028
Movement per spindle revolution (in.)
Carriage motion
Cross slide motion
S II
S II
S II
S II
S I
S I
S I
S I
METRIC
U.S.
. It provides a useful range of carriage and cross feeds,
respectively (in./rev) carriage 0.009 to 0.02, cross
slide 0.0004 to 0.0023.
2. It cuts 0 of the most popular U.S. threads found in
the model shop, simply by making gearbox selections.
In addition, the 24T/48T combination cuts the
entire
range
of metric pitches from 0.4 to 7 mm.
Note that switching from
SI
to
SII
doubles
the feed rate.
Exchanging the gears (48T upper, 24T lower) increases
all speeds by a
factor of 4
.
Figure 3-2
External change gears
Figure 3-3
Table of feed rates