Important - DeWalt DCD780 Guide D'utilisation

3. Always apply pressure in a
straight line with the bit. Use
enough pressure to keep drill
biting, but do not push hard
enough to stall the motor or
deflect the bit.
4. Hold tool firmly with both hands
to control the twisting action of
the drill. If model is not equipped
with side handle, grip drill with
one hand on the handle and
one hand on the battery pack.
WARNING: Drill may stall if overloaded causing a sudden twist.
Always expect the stall. Grip the drill firmly to control the twisting
action and avoid injury.
5. IF DRILL STALLS, it is usually because it is being overloaded
or improperly used. RELEASE TRIGGER IMMEDIATELY,
remove drill bit from work, and determine cause of stalling. DO
NOT DEPRESS TRIGGER ON AND OFF IN AN ATTEMPT
TO START A STALLED DRILL — THIS CAN DAMAGE THE
DRILL.
6. To minimize stalling or breaking through the material, reduce
pressure on drill and ease the bit through the last fractional part
of the hole.
7 . Keep the motor running when pulling the bit back out of a
drilled hole. This will help prevent jamming.
Screwdriving (Fig. 8)
1. Select the desired speed/torque
range using the gear shifter to
match the speed and torque to
the planned operation.
2. Turn the torque adjustment
collar (C) to the desired position.
NOTE: Use the lowest torque
setting required to seat the
FIG. 7
C
FIG. 8
C
12
fastener at the desired depth. The lower the number, the lower
the torque output.
3. Insert the desired fastener accessory into the chuck as you
would any drill bit.
4. Make some practice runs in scrap or on unseen areas of
the workpiece to determine the proper position of the torque
adjustment collar.
5. Always start with lower torque settings, then advance to higher
torque settings to avoid damage to the workpiece or fastener.
Hammerdrilling (Fig. 9)
1. Select the desired speed/torque
range using the gear shifter to
match the speed and torque to
the planned operation. Turn the
collar (C) to the hammerdrill
symbol.

IMPORTANT:

Use carbide-
tipped or masonry bits rated for
percussion drilling only.
2. Drill with just enough force on
the hammer to keep it from
bouncing excessively or "rising" off the bit. Too much force will
cause slower drilling speeds, overheating, and a lower drilling
rate.
3. Drill straight, keeping the bit at a right angle to the work. Do not
exert side pressure on the bit when drillling as this will cause
clogging of the bit flutes and a slower drilling speed.
4. When drilling deep holes, if the hammer speed starts to drop
off, pull the bit partially out of the hole with tool still running to
help clear debris from the hole.
NOTE: A smooth, even flow of dust from the hole indicates proper
drilling rate.
FIG. 9
C