Appendix B: Inch Feed Rates - Smithy GRANITE 1300 SERIES Operator's Manual

INCH THREADS
THREADING
Inch threads
are defined as
CHART
the number of
threads in
one inch.
Selector
I II
I - III
1
7 14
S
E
2
8 16
L
3
E 9 18
C
4
10 20
T
O
5
11 22
R
6
12 24
1-7
7
13 26
Gear
X = Teeth per gear
Selection
Lever located
I N C H
inside Pully Box
below gear cluster
Inch Feed Rates
Distance traveled per
FEED RATES =
Spindle Revolution
Longitudinal Feed
"
III I II III
28
0.0197" 0.0098" 0.0049" 0.0062" 0.0031" 0.0015"
32
0.0172" 0.0086" 0.0043" 0.0054" 0.0027" 0.0014"
36
0.0153" 0.0076" 0.0038" 0.0048" 0.0024" 0.0012"
40
0.0137" 0.0069" 0.0034" 0.0043" 0.0022" 0.0011"
44
0.0125" 0.0062" 0.0031" 0.0039" 0.0020" 0.0010"
48
0.0115" 0.0057" 0.0029" 0.0036" 0.0018" 0.0009"
52
0.0106" 0.0053" 0.0026" 0.0033" 0.0017" 0.0008"
A = 30 B = 66 C = 60
M E T R I C
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Appendix B
METRICTHREADS
Cross Feed
Metric threads are
defined as the dis-
"
tance between two
adjacent crests.
I II III I II III
0.70 0.35 3.50 1.75
0.80 0.40 4.00 2.00 1.00
0.45 4.50
1.00 0.50 5.00 2.50 1.25
0.60 6.00 3.00 1.50
A = 33 C = 63
D = 60
=
B = 80 D
INCH
I II III
5.50 2.75
6.50 3.25
A = 66 C = 63
B = 64 D = 60
60
METRIC
B-1