Drilling Metal - Flex DD 2G 18.0-EC LD Operating Instructions Manual

DD 2G 18.0-EC LD / PD 2G 18.0-EC LD
a. Check that the direction preselector
switch 7 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 4 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 efficiency.
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.
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 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.
Drilling wood (see figure P)
For maximum performance, use high-speed
steel or brad-point bits for wood drilling.
■ Begin drilling at a very low speed to
prevent the bit from slipping off the
starting point.
■ Increase speed as the drill bit bites into the
material.
■ 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.

Drilling metal

For maximum performance, use high-speed
steel bits for metal or steel drilling.
■ 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 efficiency.
■ Begin drilling at a very low speed to
prevent the bit from slipping off the
starting point.
■ 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.
– Produce off-center or irregularly shaped
holes.
Driving screws (see figure Q)
Try to use standard-type screws for easy
driving and improved grip.
a. Install the correct driver bit.
b. Ensure that the torque-adjustment
ring is set to the most suitable setting.
If in doubt, start with a low setting
and gradually increase the setting as
necessary. Do not change the torque
setting when the tool is running.
c. Use the correct gear ("1" or "2") for the
job and initially apply minimal pressure
to the variable speed trigger switch.
Increase the speed only when full control
can be maintained.
d. It is advisable to drill a pilot hole first.
This hole should be slightly longer than
the screw to be driven and just smaller
than the shank diameter of the screw. The
pilot hole will act as a guide for the screw
and will also make tightening the screw
less difficult. When screws are positioned
close to an edge of the material, a pilot
hole will also help to prevent splitting of
the wood.
e. Use a countersinking bit (sold separately)
to accommodate the screw head so that
it does not protrude from the surface.
f. Keep sufficient pressure on the drill to
prevent the bit turning out of the screw
head. The screw head can easily become
damaged, making it difficult to drive
home or remove.
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