Grizzly G0492 User Manual
Page 30
-28-
G0492 12" X 36" Combo Lathe/Mill
Figure 32. Spindle speed selector levers.
2. Determine the average final diameter of the
workpiece in inches, for the cut to be made.
3. Now use the following formula to determine
the closest RPM for the cutting operation:
(Cutting Speed x 4)
Diameter of Cut
4. With the calculated RPM, decide on the clos-
est cutting RPM to what you need.
5. Make sure the spindle is completely stopped
before proceeding.
6. Move the levers (Figure 32) to get the
RPM range that is closest to your calculated
RPM:
— The range lever selects BLACK DOT =
High or RED DOT = Low.
— The RPM Lever selects the RPM within
that range.
RPM Lever
= RPM
Range
Lever
RPM/Range Chart
Note: You may need to rotate the chuck by hand
to get the gears to engage.
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