Understanding Gear Charts - Grizzly G0791 Owner's Manual

Configuration Example
Figure 68 shows the levers positioned for a
spindle speed of 600 RPM.
Note: If the spindle speed levers do not easily
adjust into position, rotate the spindle by hand
while you apply pressure to the lever. When the
gears align, the lever will easily move into place.
If you have trouble rotating the spindle by hand,
you can use the spindle key or a chuck key to get
additional leverage—just be sure to remove the
key when you are done.
Alpha
Lever
Set to "C"
Spindle Speed RPM
I
A 270
B 70
C 200
Figure 68. Setting the spindle speed to 600
RPM.
-52-
Numeric
Lever
Set to "III"
II III
1400 800
360 220
1000 600
Understanding Gear
Charts
This subsection explains how to understand the
feed and thread charts on the headstock. If you do
not understand lathe gear charts, or need a quick
refresher, read this before configuring the end
gears for power feeding or threading operations.
Feed & Threading Chart Labels
The feed and thread chart labels (see Figure 69)
provide information for setting up end gears and
gearbox levers for threading or non-threading
operations.
Metric Threading
Chart Label
Feed Chart
Label (On
Left Side of
End Gear
Cover)
Figure 69. Feed and thread charts label.
Feed Chart—Displays gearbox dial positions for
different speeds of automatic feed (power feed)
used with turning operations (see Figure 70).
Figure 70. Feed rate chart.
Model G0791 (Mfd. Since 9/15)
Inch Threading
Chart Label
Gearbox
Levers