Operation - Milwaukee 1680-20 Operator's Manual

WARNING
To reduce the risk of injury, always
wear eye protection.
Chuck Removal (Fig. 5)
This tool is equipped with a threaded spindle
to hold the chuck. Before removing the
chuck, unplug the tool and open the chuck
jaws. A left-handed thread screw is located
inside the chuck to prevent the chuck from
loosening when the tool is operated in re-
verse direction. Remove the screw by turning
it clockwise. To remove the chuck, hold the
tool so that only the side of the chuck rests
fi rmly and squarely on a solid workbench.
Insert the chuck key or a chuck remover bar
in one of the keyholes. Turn the chuck so the
key is at about a 30° angle to the bench top
and strike the key sharply with a hammer so
the chuck turns in a counterclockwise direc-
tion (looking from the front of the tool). This
should loosen the chuck from the spindle
which has a right hand thread making it easy
to remove the chuck by hand.
NOTE: When replacing the chuck, always
replace the left hand thread screw in the
chuck.
Fig. 5

OPERATION

WARNING
To reduce the risk of injury, wear
safety goggles or glasses with side
shields.
WARNING
To reduce the risk of personal injury
when drilling, hold tool by insulated
gripping surfaces when performing
an operation where the cutting tool
may contact hidden wiring or its own
cord. Contact with a "live" wire will
make exposed metal parts of the
tool "live" and shock the operator.
WARNING
To reduce the risk of injury, hold or
brace securely. Always be prepared
for bit binding and drill reaction.
Clutch
The Super Hawg ™ has a clutch that is ac-
tive when the tool is running in low speed
only. The clutch disengages the bit from the
geartrain to protect the tool. When a high
load is encountered, the clutch will slip and
a ratcheting sound will be heard. Release the
trigger switch when the clutch begins to slip
(see "Bit Binding"). Continuous use of the
tool when the clutch is slipping will reduce
the life of the mechanism.
8
Bit binding (Fig. 6)
Fig. 6
B
A
If the bit binds, the drill will suddenly react in
the opposite direction of the rotation of the
bit. Figure 6 shows the path of reaction, (B) if
the drill bit binds while being driven in forward
(A). Reduce the chances of a sudden reac-
tion by following the instructions listed below.
Prepare for a sudden reaction by holding or
bracing securely.
To reduce the chance of bit binding:
• Use sharp bits. Sharp bits are less likely
to bind when drilling.
• Use the proper bit for the job. There are
many types of bits designed for specifi c
purposes.
• Use the proper speed for the size bit.
Larger bits should be run at the lower
speed (see "Specifi cations"). Driving
larger bits at high speeds will increase
the chance of the bit binding and in-
crease the chance of reaction.
• Keep selfeed bits aligned with the work
surface so bits go in straight (see "Drill-
ing").
• Avoid drilling warped, wet, knotty, and/or
pitchy material if possible.
• Avoid drilling in material that you suspect
contains hidden nails or other things that
may cause the bit to bind.
The direction of reaction is always opposite
of the direction of bit rotation. Reaction is
even more likely to occur when enlarging
already existing holes and at the point when
the bit breaks through the other side of the
material.
If the bit does bind:
1. Release the trigger immediately.
2. Reverse the motor.
3. Remove the bit from the work and start
again.
4. Do not pull the trigger on and off to
attempt to start a stalled bit. This will
damage the drill.
Bracing for forward rotation (Fig. 7 & 8)
Fig. 7
C
A
Fig. 8 D
A
B
When drilling in forward, the bit will rotate in
a clockwise direction. If the bit binds in the
hole, the bit will come to a sudden stop and
drill will suddenly react in a counterclockwise
direction.
There are two ways to properly brace the Su-
™
per Hawg for forward rotation (Fig. 7 & 8).
A. Forward (clockwise) rotation
B. Reaction
C. Brace drill with side handle here
D. Brace drill with gearcase here
If the bit binds, the side handle or the
gearcase braced against the stud will hold
the drill in position.
9
B