-42-
Model G9972Z (Mfd. Since 03/20)
Feed Rate
Feed rate is the speed the tool travels during the
operation and is expressed in inches of carriage
travel per revolution of the spindle (IPR), and is
set by configuring the change gears and feed rate
dials.
The correct feed rate is determined by the
workpiece material, the type of tooling used, and
the desired finish. The table in
Figure 52 shows
the recommended feed rate for turning most met-
als.
Recommended Feed Rates
Work Material
Magnesium
Aluminum
Brass & Bronze
Copper
Cast Iron (Soft)
Cast Iron (Hard)
Mild Steel
Cast Steel
Tool Steel
Alloy Steels (Hard)
Stainless Steel
Titanium
Hi Maganese Steel
Tool Feed Rate (IPR)
Rough Cuts
Finish Cuts
0.015–0.025
0.015–0.025
0.015–0.025
0.010–0.020
0.015–0.025
0.010–0.020
0.010–0.020
0.010–0.020
0.010–0.020
0.010–0.020
0.010–0.020
0.010–0.020
0.010–0.020
0.005–0.010
0.005–0.010
0.003–0.010
0.004–0.008
0.005–0.010
0.003–0.010
0.003–0.010
0.003–0.010
0.003–0.010
0.003–0.010
0.003–0.010
0.003–0.010
0.003–0.010
Note: These values are a guideline only. Refer
to the MACHINERY’S HANDBOOK for more
detailed information.
Figure 52. Recommended feed rate table.
b
a
lever C
A
B
24
28
28
35
84
70
77
70
II
II
II
I
0.0022
0.0030
0.0033
0.0038
0.0045
0.0060
0.0067
0.0077
0.0090
0.0120
0.0135
0.0150
b
a
120
127
45
45
ins/
Figure 54. Feed rate chart for power feed movement of the carriage.
The V-belt, change gears,
and pulleys represent
a serious entanglement
hazard when the lathe
is running. Always dis-
connect the lathe from
power before opening
the change gear cover.
Use
Figure 53 to identify the change gears and
their positions.
Note: This lathe is shipped with the 24 tooth gear
installed in the "
a" position, and the 84 tooth gear
in the "
b" position.
Figure 53. Change gears.
Change
Gear "
b"
Pivot Arm &
Cap Screw
Change Gear
120/127T
Change
Gear "
a"
Summary of Contents for G9972Z
Page 84: ......
