Maintenance - DeWalt D25012K Owner's Manual

EN G LI S H
Trigger Switch (fig. 1)
To start the rotary hammer, depress the trigger
switch (a). To stop rotary hammer, release the
switch.
VARIABLE SPEED
The variable speed trigger switch (a) permits speed
control. The farther the trigger switch is depressed,
the higher the speed of the drill.
LOCK-ON BUTTON
WARNING: Be sure to release the
locking mechanism before disconnecting
the plug from the power supply. Failure to
do so will cause the hammerdrill to start
immediately the next time it is plugged in.
Damage or personal injury could result.
The lock-on button (i) is for use only when the rotary
hammer is stationary, mounted in a drill press stand
or for chipping applications.
Before using the tool each time, be sure that the
lock-on button release mechanism is working freely.
For continuous operation, press and hold the trigger
switch (a); press the lock-on button (i); release the
trigger switch and then release the lock-on
button.The tool will continue to run.
To stop the tool in continuous operation, quickly
press and release the trigger switch.
Proper Hand Position (fig. 3)
WARNING: To reduce the risk of serious
personal injury, ALWAYS use proper hand
position as shown.
WARNING: To reduce the risk of serious
personal injury, ALWAYS hold 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 (fig. 2)
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.
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Depress mode selector button (f) and turn the mode
selector (g) to the drill bit symbol for drilling, to the
hammer symbol for hammering or to the
hammerdrill symbol for hammerdrilling.
DRILLING OPERATION
For WOOD, use twist bits, spade bits, power
1.
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.
Always apply pressure in a straight line with the
2.
bit. Use enough pressure to keep the drill bit
biting, but do not push hard enough to stall the
motor or deflect the bit.
Hold tool firmly with both hands to control the
3.
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.
IF DRILL STALLS, it is usually because it
4.
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.
To minimize stalling or breaking through the
5.
material, reduce pressure on drill and ease the
bit through the last fractional part of the hole.
Keep the motor running when pulling the bit
6.
back out of a drilled hole. This will help prevent
jamming.
With variable speed drills there is no need to
7.
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
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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
bedrilled 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
wood can be made with the same twist drills used
for metal. These bits may overheat unless pulled out
frequently to clear chips from the flutes. For larger
holes, use spade bits, power auger bits, or hole
saws. Work that is apt to splinter should be backed
up with a block of wood.
Screwdriving (fig. 1)
1. Set the mode selector switch (g) to the rotary
drilling position.
Select the direction of rotation.
2.
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3. Insert the special SDS Plus
adaptor for use with hexagonal screwdriver bits.
4. Insert the appropriate screwdriver bit. When
driving slotted head screws always use bits with
a finder sleeve.
5. Gently press the variable speed switch (a) to
prevent damage to the screw head. In reverse
(LH) rotation the tool speed is automatically
reduced for easy screw removal.
6. When the screw is flush with the workpiece,
release the variable speed switch to prevent the
screw head from penetrating into the
workpiece.
Hammerdrill Operation
When drilling, use just enough force on the
1.
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.
Chipping and chiselling (D25013)
To switch from hammer drilling to chiselling, first
1.
insert the SDS-plus
properly locked.
When switching from hammer drilling mode to
2.
chiselling mode, turn the chisel to the desired
position. If you find resistance during mode
change, turn the chisel slightly to engage the
spindle lock.
Various types of SDS-plus
are available as an option.
Consult your dealer for further information on the
appropriate accessories.

MAINTENANCE

Your D WALT power tool has been designed to
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operate over a long period of time with a minimum
of maintenance. Continuous satisfactory operation
depends upon proper tool care and regular
cleaning.
This machine is not user-serviceable. Take the
tool to an authorised D
approximately 40 hours of use. If problems
occur before this time contact an authorised
screwdriving
D WALT repair agent.
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The tool will automatically switch off when the
carbon brushes are worn.
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chisel and check if it is
WARNING:
The hammer is only for light chiselling
applications.
The forward/reverse switch must be in
the forward position when chiselling.
WARNING:
Do not use this tool to mix or pump
easily com busti ble or explosive fluids
(ben zine, alcohol, etc.).
Do not mix or stir inflammable liquids
labelled accordingly.
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drill bits and adaptors
WARNING: To reduce the risk of
injury, turn unit off and disconnect
machine from power source before
installing and removing accessories,
before adjusting or changing set-ups or
when making repairs. Be sure the trigger
switch is in the OFF position. An
accidental start-up can cause injury.
WALT repair agent after
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