Installing/Removing Drill Bits; Setting Depth Stop - Grizzly G7947 Owner's Manual

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:
1.
DISCONNECT MACHINE FROM POWER!
2.
Open the drill chuck wide enough to accept
the shank of the drill bit.
3.
Insert the drill bit as far as possible into the
chuck WITHOUT allowing the chuck jaws to
touch the fluted portion of the bit, and hand
tighten the chuck.
Note: Make sure small bits are not trapped
between the edges of two jaws; if they are,
reinstall the drill bit or it will not be secure
enough to use for drilling.
4.
Final tighten the drill bit with the chuck key.
To remove a drill bit:
1.
DISCONNECT MACHINE FROM POWER!
2.
Use the chuck key to open the drill chuck,
and catch the drill bit with a rag to protect
your hands.
Model G7947/G7948 (Mfd. Since 01/21)

Setting Depth Stop

The Model G7947/G7948 has a depth stop that
allows you to drill repeated non-through holes to
the same depth every time.
The depth stop consists of a stud attached to the
quill with two hex nuts that can be lowered or
raised on the stud so the lower nut (depth nut) hits
a stop bracket when the drill bit is lowered. The
upper hex nut (jam nut) is then used to tighten
against the depth nut to secure it in place so it
doesn't move with repeated operations. Figure 33
shows the various components of the depth stop.
To set the depth stop:
1.
Lower the drill bit to the required height.
2.
Thread the depth nut down against the stop
bracket (see Figure 33).
Depth
Stop Stud
Depth
Nut
Figure 33. Depth-stop components.
3. Lower the jam nut against the depth nut.
4. Using wrenches, hold the depth nut in place
and tighten the jam nut against the depth nut.
Note: The scale on the depth stop can be
recalibrated if it gets moved or has changed
since the factory setting. Refer to Calibrating
Depth Stop on Page 41 for instructions on
how this is done.
Jam Nut
Stop
Bracket
-31-