Feed Rate - Grizzly G9972Z Owner's Manual

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 40 shows
the recommended feed rate for turning most met-
als.
Recommended Feed Rates
Work Material Rough Cuts
Magnesium 0.015–0.025
Aluminum 0.015–0.025
Brass & Bronze 0.015–0.025
Copper 0.010–0.020
Cast Iron (Soft) 0.015–0.025
Cast Iron (Hard) 0.010–0.020
Mild Steel 0.010–0.020
Cast Steel 0.010–0.020
Alloy Steels (Hard) 0.010–0.020
Tool Steel 0.010–0.020
Stainless Steel 0.010–0.020
Titanium 0.010–0.020
Hi Maganese Steel 0.010–0.020
Note: These values are a guideline only. Refer
to the MACHINERY'S HANDBOOK for more
detailed information.
figure 40. recommended feed rate table.
ins/
45
a
45
120
127
b
figure 42. Feed rate chart for power feed movement of the carriage.
-32-
Tool Feed Rate (IPR)
Finish Cuts
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
a
24
28
28
35
Use figure 41 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.
Change gear
120/127t
Change
gear "b"
figure 41. Change gears.
b lever C
84 II
0.0022
70 II
0.0030
77 I
0.0033
70 II
0.0038
G9972Z 11" x 26" Lathe w/Gearbox
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.
Change
gear "a"
pivot arm &
Cap screw
A B
0.0045 0.0090
0.0060 0.0120
0.0067 0.0135
0.0077 0.0150