Grizzly G0793, Owner'S Manual

Page: 31 / 60

Model G0793 (Mfd. Since 02/15)
-29-
Tapping Mode
When in tapping mode, the spindle direction
can immediately alternate between forward and
reverse by pressing the spindle reverse button on
the control panel. This feature is critical to back
the tap out of a hole before it bottoms out and
snaps off, as well as clearing away waste chips
during the tapping process.
Note: Pilot holes must be drilled prior to beginning
any tapping operation.
To use tapping mode:
1. DISCONNECT MACHINE FROM POWER!
2. Determine maximum tapping depth without
bottoming-out tap, and adjust depth stop
accordingly.
3. Secure workpiece to table.
4. Put on safety glasses and face shield.
5. Install tap, and apply tapping fluid to contact
point of tap and workpiece.
6. Connect machine to power.
7. Turn drilling/tapping switch left to select "tap-
ping" mode (see
Figure 25 on Page 27).
8. Select appropriate spindle speed and spindle
rotation.
9. Press Spindle Start button.
10. Begin threading. Without disengaging tap
from threads, frequently alternate spindle
rotation with Spindle Reverse Button to eject
chips from hole and prevent galling and tap
breakage.
11. Press Spindle Reverse button when spindle
depth stop contacts downfeed engagement
lever, and remove tap from workpiece.
Coolant System
This machine comes with a coolant system for
use in drilling and tapping operations. This feature
promotes precision cutting and tool longevity.
Figure 28. Location of coolant ball valve for
regulating coolant flow.
Coolant Ball
Valve
To operate coolant system:
1. Check there is a sufficient amount of clean
coolant in reservoir (refer to Page 36 for
detailed instructions).
2. Aim coolant nozzle at contact area of
workpiece and the cutting tool.
3. Turn coolant pump switch on control panel to
ON position.
4. Regulate coolant flow to contact area using
coolant ball valve shown in Figure 28.
If pump is running, ball valve is open, and
no coolant is flowing from coolant nozzle,
this is an indication of inadequate coolant
levels in reservoir. Immediately turn pump
OFF! Running pump without adequate cool-
ant can lead to pump damage, which will not
be covered under warranty.