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Milling/Drilling Mode
This mill is designed to use end mills, taps, drill
bits, and face cutters up to 2
milling table has a coolant trough with drain for an
optional cutting fluid system.
Overloading the bit, tap, or cutter or using
excessive spindle speeds may threaten
operator safety from ejected parts or bro-
ken tools.
To mill a workpiece:
1.
Refer to Controls on Page 19 to understand
the functions of the machine controls.
2.
Zero the spindle height scale and select units
of measure, then close the chip guard.
3.
Clamp the workpiece to the milling table, and
adjust the headstock to the needed angle,
height, depth of cut, and milling path.
Remember: Milling with the quill fully extend-
ed can cause tool chatter. For maximum
spindle rigidity, keep the spindle retracted
into the headstock as far as possible with the
quill lock lever locked and the fine feed lock
knob tightened.
4.
Refer to Selecting Spindle RPM on Page 21
to find the best spindle RPM.
5.
Put your safety goggles on, the turn the
power switch ON.
6.
Select MILLING with the toggle switch.
FORWARD will be shown in the digital dis-
play.
7.
Press the ON button to start the mill, and turn
the spindle speed dial until the required RPM
is shown in the spindle speed readout.
8.
Lock the appropriate table lock levers and
use an X or Y handwheel to slowly feed the
workpiece into the cutter.
Model G0720R (Mfg. Since 11/10)
⁄
" in diameter. The
1
8
Tapping Mode
When in the tapping mode, the spindle direction
can immediately alternated between forward and
reverse immediately by pressing any of the spindle
direction buttons at the end of the downfeed han-
dles. This feature is critical to back the tap out of
a hole before it bottoms and snaps off. However,
using this feature takes practice and cutting
threads into blind holes should be avoided.
Overloading the bit, tap, or cutter or using
excessive spindle speeds may threaten
operator safety from ejected parts or bro-
ken tools.
To drill and thread a hole:
1.
Refer to Controls on Page 19 to understand
the functions of the machine controls.
2.
Zero the spindle height scale and select units
of measure, and calculate your maximum
tapping depth without bottoming-out the tap.
3.
Clamp the workpiece to the milling table, and
adjust the headstock to the needed height for
drilling and tapping.
4.
Put on safety goggles, select MILLING with
the toggle switch. FORWARD will be shown
in the digital display.
5.
Drill your hole with the appropriate speed and
drill bit size for the tap. For large holes, drill a
pilot hole.
6.
Install the tap, and apply tapping fluid.
7.
Select TAPPING with the toggle switch,
press the ON button, and turn the spindle
speed dial to 100 RPM.
8.
Begin threading, but without disengaging
the tap from the threads, frequently push the
spindle direction buttons to alternate spindle
rotation back and forth to eject chips from the
tap and hole in order to prevent chip loading
and tap breakage.
-27-
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