10
To install the bit
a. Grasp the rear half of the chuck with one hand
and use your other hand to rotate the front half
in the counterclockwise direction, as viewed
from chuck end, to open the chuck to
approximately the bit diameter.
b. Insert a clean bit up to the drill-bit flutes for small
bits, or as far as it will go for large bits. Tighten
securely by holding the rear half of the chuck and
rotating the front portion in the clockwise
direction as viewed from the chuck end.
To remove the bit
c. Grasp the rear half of the chuck with one hand
and use your other hand to rotate the front half
in the counterclockwise direction, as viewed
from chuck end, to open the chuck.
d. Remove the bit.
Use protective gloves when
removing the bit from the tool, or
first allow the bit to cool down. The bit may be hot
after prolonged use.
DRILL BITS
Always inspect drill bits for excessive wear. Use only
bits that are sharp and in good condition.
Twist Bits:
Available with straight and reduced
shanks for wood and light-duty metal drilling. High-
speed bits cut faster and last longer on hard
materials.
Carbide-Tipped Bits:
Used for drilling stone,
concrete, plaster, cement, and other unusually hard
nonmetal materials. Use continuous, heavy feed
pressure when using carbide-tipped bits.
VARIABLE-SPEED TRIGGER SWITCH
See Fig. 8
Your tool is equipped with a variable-speed trigger
switch. The tool can be turned "ON" or "OFF" by
depressing or releasing the trigger.
The variable-speed trigger switch delivers higher
speed with increased trigger pressure and lower
speed with decreased trigger pressure.
LED WORKLIGHT
See Fig. 9
Your tool is equipped with an LED worklight, located
in the front of the tool, that illuminates when the
variable-speed trigger switch is squeezed. This
provides additional light on the surface of the
workpiece for operation in lower-light areas.
DRILLING
See Fig. 10
Always wear safety goggles or
safety glasses with side shields
during power tool operation or when blowing dust. If
operation is dusty, also wear a dust mask.
a. Check that the direction-of-rotation selector is at
the correct setting (forward or reverse).
b. Secure the material to be drilled in a vise or with
clamps to keep it from turning as the drill bit
rotates.
c. Hold the drill firmly, and place the bit at the point
to be drilled.
d. Depress the variable-speed trigger switch to start
the drill.
e. Move the drill bit into the workpiece, applying only
enough pressure to keep the bit "biting". Do not
force the drill or apply side pressure to elongate
a hole. Let the tool do the work.
f. When drilling hard, smooth surfaces, use a center
punch to mark the desired location of the hole.
This will prevent the drill bit from slipping off-
center as the hole is started.
g. When drilling metals, use light oil on the drill bit to
keep it from overheating. The oil will prolong the
life of the bit and increase the drilling action.
h. If the bit jams in the workpiece or if the drill stalls,
stop the tool immediately. Remove the bit from
the workpiece and determine the reason for
jamming.
NOTICE:
There are two rules for drilling hard
materials. First, the harder the material, the greater
the pressure you need to apply to the tool. Second,
the harder the material, the slower the speed should
be. If the hole to be drilled is fairly large, drill a
smaller hole first, and then enlarge to the required
size with a larger bit; it's often faster in the long run.
WOOD DRILLING
See Fig. 11
For maximum performance, use high-speed steel or
brad-point bits for wood drilling.
a.
Begin drilling at a very low speed to prevent the
bit from slipping off the starting point.
b.
Increase speed as the drill bit bites into the
material.
c.
When drilling "through" holes, secure a block of
wood behind the workpiece to prevent ragged or
splintered edges on the back side of the
workpiece.
NOTICE:
Bits may overheat unless reversed and
pulled out frequently to clear chips from flutes.
METAL DRILLING
For maximum performance, use high-speed steel
bits for metal or steel drilling.
a. When drilling metals, use light oil on the drill bit
to keep it from overheating. The oil will prolong
the life of the bit and increase the drilling action.
b. Begin drilling at a very low speed to prevent the
bit from slipping off the starting point.
c. Maintain a speed and a pressure that allow
cutting without overheating the bit. Applying too
much pressure will:
– Overheat the drill.
– Wear the bearings.
– Bend or burn bits.
