Overload Clutch; Drilling Tools - DeWalt D25052 Original Instructions Manual

securely in anticipation of a sudden
reaction.
Proper hand position requires one hand on the
side handle (c), with the other hand on the main
handle (b).

Overload Clutch

If the drill bit becomes jammed or caught, the drive
to the drill spindle is interrupted by the overload
clutch. Because of the forces that occur as a result,
always hold the machine securely with both hands
and take a firm stance.

Drilling Tools

The machine is intended for hammerdrilling in
concrete, brick and stone. It is also suitable for
drilling without impact in wood, metal, ceramic and
plastic.
Drilling (fi g. 1, 5)
WARNING: To reduce the risk
of serious personal injury, turn
tool off and disconnect tool from
power source before making any
adjustments or removing/installing
attachments or accessories.
WARNING: To reduce the risk of
personal injury, ALWAYS ensure
workpiece is anchored or clamped
firmly. If drilling thin material, use a wood
"back-up" block to prevent damage to
the material.
WARNING: To reduce the risk of
personal injury, ALWAYS operate
the tool with the side handle properly
installed and securely tightened. Failure
to do so may result in the side handle
slipping during tool operation and
subsequent loss of control. Hold tool
with both hands to maximize control.
Rotate the mode selection collar (f) to the drill bit
symbol for drilling or to the hammerdrill symbol for
hammerdrilling.
DRILLING 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.
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.
DRILLING IN METAL
®
An SDS Plus to round shank adapter chuck is
required. Ensure that tool is in drill-only mode. Start
drilling with slow speed and increase to full power
while applying firm pressure on the tool. A smooth
even flow of metal chips indicates the proper drilling
rate. Use a cutting lubricant when drilling metals.
The exceptions are cast iron and brass which should
be drilled dry.
NOTE: Large [7.9 mm to 12.7 mm (5/16" to 1/2")]
holes in steel can be made easier if a pilot hole
[4 mm to 4.8 mm (5/32" to 3/16")] is drilled first.
DRILLING IN WOOD
An SDS Plus ® to round shank adapter chuck is
required. Ensure that tool is in drill-only mode. Start
drilling with slow speed and increase to full power
while applying firm pressure on the tool. Holes in
ENGLISH
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