Grizzly G9749 - Manual (Page 20)

-18-
G9749 Variable Speed Drill Press
Installing/Removing
Drill Bits
Any drill bit you install in the chuck must be tight
enough that it will not come loose during opera-
tion.
To install a drill bit into the chuck:
1. UNPLUG THE DRILL PRESS!
2. Open the chuck jaws wide enough to accept
the drill bit shank.
3. Insert the drill bit as far as possible into the
chuck WITHOUT allowing the chuck jaws to
touch the fluted or cutting portion of the drill
bit, then hand tighten the chuck.
Note: Make sure small drill bits are not
trapped between the edges of two jaws. If
they are, reinstall the drill bit properly before
use.
4. Use the included chuck key to fully tighten the
chuck around the drill bit.
To remove a drill bit from the chuck:
1. UNPLUG THE DRILL PRESS!
2. Use the chuck key to open the chuck, and
catch the drill bit with a rag to protect your
hands.
Changing Speeds
The Model G9749 drill press is capable of variable
speeds from 300-2000 RPM. Refer to
Choosing
Speeds on Page 19 for the correct speed for the
cutting tool and material being used.
To change speed of the drill press:
1. Turn the drill press ON.
2. Loosen the speed control locking knob (see
Figure 14).
3. Using the small reference mark or notch on
the outside ring of the speed control helm as
a guide, SLOWLY rotate the speed control to
the desired speed.
Note: Rotating the speed control helm too
fast will greatly increase the wear on the drive
belts and pulleys.
4. Tighten the speed control locking knob to
hold the helm in place against machine vibra-
tion.
Figure 14. Speed control handles and helm.
NOTICE
DO NOT attempt to change speeds unless
the drill press is ON. Attempting to rotate
the speed control when the drill press
is OFF could damage the variable speed
mechanism.
Locking Knob
and Plate
Speed Control
Helm