Smithy GN1300 - Manual (Page 69)

Below the symbol is a representation of the feed gears, A, B, C, and D on the
gear quadrant. These gears are located inside the pulley box. Immediately to
the right of the gear symbols are the numbers 1 through 7, which refer to the
position of the powerfeed selection lever (1-7) on the feed transmission.
Below the gear symbols is the location guide for the gear numbers
which are stamped on the face of the gears. This formula refers to
which gear number belongs in which location in order to move the
carriage or table for threading and powerfeeding.
A C
B D
X
1”
N in in in in
A
B
C
D
7 14 28 0.125 0.250 0.500 0.039 0.079 0.157 0.35 0.70 1.75 3.50
8 16 32 0.109 0.218 0.437 0.034 0.069 0.138 0.40 0.80 1.00 2.00 4.00
9 18 36 0.097 0.194 0.388 0.031 0.061 0.122 0.45 4.50
10 20 40 0.087 0.175 0.349 0.028 0.055 0.110 0.50 1.00 1.25 2.50 5.00
11 22 44 0.079 0.159 0.317 0.025 0.050 0.100 2.75 5.50
12 24 48 0.073 0.146 0.291 0.023 0.046 0.092 0.60
1.50
(0.75)
3.00 6.00
13 26 52 0.067 0.134 0.269 0.021 0.042 0.085 3.25 6.50
II III III II I III II I III II I III II I
X
30 60
66 60
X
33 63
80 60
X
(33)66 63
64 60
X
1
2
3
4
5
6
7
A C
B D
I
INCH METRIC INCH METRIC
Header Section 1 Section 2 Section 3 Section 4 Section 5
Figure 8.6 Feed Rate Chart
Granite 1300 Series Operator’s Manual
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