DeWalt DWD522KS Traduction De La Notice D'instructions Originale page 34

ENGLISH
To release bit, turn chuck key counterclockwise
in just one hole, then loosen the chuck by hand.
Any authorized D WALT service center can install a
E
keyless chuck in place of a keyed chuck.
Depth Rod (fi g. 2)
TO ADJUST THE DEPTH ROD (L):
Loosen the handle (e) and move rod so that the
distance between the end of the rod and the end of
the bit equals the desired drilling depth. When drilling
with depth rod, stop when end of rod reaches
surface of material.
Drilling
Turn the collar to the drill bit symbol for drilling or to
the hammer symbol for hammerdrilling. Install and
tighten the desired drill bit in the chuck.
DRILLING OPERATION
Select the desired speed/torque range using the
speed selector collar to match the speed and torque
to the planned operation.
1. For WOOD, use twist bits, spade bits, power
auger bits or hole saws. For METAL, use high-
speed steel twist drill bits or hole saws. Use
a cutting lubricant when drilling metals. The
exceptions are cast iron and brass which should
be drilled dry. For MASONRY, use carbide-
tipped bits or masonry bits. A smooth, even
flow of dust indicates the proper drilling rate.
2. Always apply pressure in a straight line with the
bit. Use enough pressure to keep the drill bit
biting, but do not push hard enough to stall the
motor or deflect the bit.
3. Hold tool firmly with both hands to control the
twisting action of the drill.
WARNING: Drill may stall if overloaded
causing a sudden twist. Always expect
the stall. Grip the drill firmly with both
hands to control the twisting action and
avoid injury.
4. IF DRILL STALLS, it is usually because it
is being overloaded. RELEASE TRIGGER
IMMEDIATELY, remove drill bit from work,
and determine cause of stalling. DO NOT
CLICK TRIGGER OFF AND ON IN AN
ATTEMPT TO START A STALLED DRILL –
THIS CAN DAMAGE THE DRILL.
5. To minimize stalling or breaking through the
material, reduce pressure on drill and ease the
bit through the last fractional part of the hole.
6. Keep the motor running when pulling the bit
back out of a drilled hole. This will help prevent
jamming.
32
7. With variable speed drills there is no need to
center punch the point to be drilled. Use a
slow speed to start the hole and accelerate by
squeezing the trigger harder when the hole is
deep enough to drill without the bit skipping
out.
HAMMERDRILL OPERATION
1. When drilling, use 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.
2. Drill straight, keeping the bit at a right angle to
the work. Do not exert side pressure on the bit
when drilling as this will cause clogging of the
bit flutes and a slower drilling speed.
3. When drilling deep holes, if the hammer speed
starts to drop off, pull the bit partially out of
the hole with the tool still running to help clear
debris from the hole.
4. For masonry, use carbide-tipped bits or
masonry bits. A smooth even flow of dust
indicates the proper drilling rate.
DIAMOND DRILLING
D21570
The D21570 is designed for dry diamond drilling into
masonry up to 127 mm.
For diamond drilling above this diameter in masonry
and regular large diameter diamond drilling in
masonry and concrete, we advise the use of a
D WALT D21580, D21582 or D21583 diamond core
E
drill.
Use speed 2 for diamond core bits with diameters
between 22–68 mm. Always use speed 1 for
diamond core bits between 68 mm and 127 mm in
diameter.
Follow the core bit or manufacturer's
recommendations for using the accessory.
NOTE: Always use core bits with integral centredrill
systems.
1. Insert the centredrill into its holder in the centre
of the core bit.
Drill at low speed until the core penetrates the
surface approximately 5–10 mm.
2. Remove and unplug the machine.
3. Remove the centredrill from its holder.
4. Plug the machine in and insert the core bit into
the workpiece.
5. Begin drilling, increasing to full speed and drill to
the desired depth.