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G4015 Lathe/Mill -33-
Reading the Charts
A
–
B
24
–
120
30
–
120
36
–
120
42
–
120
60
–
120
60
–
120
60
–
120
60
–
120
C
–
D
I
II
0.1 0.125 0.15 0.175
0.05 0.063 0.075
0.088
Xmm
A
B
C
D
A
–
B
24
–
120
30
–
120
36
–
120
42
–
120
60
–
120
60
–
120
60
–
120
60
–
120
C
–
D
I
II
0.0039 0.0049 0.0059 0.0069
0.0020 0.0025 0.0030
0.0035
Inch
A
B
C
D
Charts for the powerfeed and thread cutting fea-
tures are located on the inside of the Lower Belt
Guard. Figure 38 shows a segment of the chart
and a brief description.
Gearing for feed rates are detailed in
Figure 38.
In the example below we will be selecting gears
for a feed rate of 0.002" per revolution:
1. Find 0.002" in the chart.
2. Locate the number in row A, which is above
0.002". The number is 24, representing a
gear with 24 teeth.
3. The number in row B above 0.002" is 120
and the number in row C is 60. These 2 num-
bers represent one of the 2 combination
gears supplied with your lathe.
4. Finally, in row D you will find the number 120
which represents a gear with 120 teeth.
5. Looking at the Gear Layout we see that gear
A (24 teeth) meshes with gear B (120 teeth)
and that gear C (60 teeth) meshes with gear
D (120 teeth).
5. Move the Feed Rate Lever to the I position
as described in the section titled Feed
Selection.
Please note that the corresponding feed rate in
millimeters would be 0.1 millimeters per revolu-
tion and that the gearing is identical.
Figure 38.
Rates given in millimeters and inches.
Please note that these charts reflect approximate
apron movement per revolution.
1. Millimeters per revolution.
2. Gear layout for millimeters per revolution.
3. Inches per revolution.
4. Gear layout for inches per revolution.
5. Gear position A (all numbers in the row to the
right represent number of teeth on gears
used here).
6. Gear position B and C: combination gears
listed as 125/127 or 120/60.
7. Gear position D (all numbers in the row to
the right represent number of teeth on gears
used here).
8. Feed rate selected for I.
9. Feed rate selected for II.
10. Approximate feed rates in inches or millime-
ters.
4
5
6
7
8
9
10
1
2
3
}
10
}
Feed Rates