DeWalt Compact SDS+ D25012K, Owner'S Manual

E N G L I 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. 

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 
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 
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 
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 

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 
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 
back out of a drilled hole. This will help prevent 
jamming.  
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 
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)

Set the mode selector switch (g) to the rotary 
drilling position. 
Select the direction of rotation. 
Insert the special SDS Plus

®

 screwdriving 

adaptor for use with hexagonal screwdriver bits.
Insert the appropriate screwdriver bit. When 
driving slotted head screws always use bits with  

a finder sleeve. 
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. 
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 
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. 
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. 
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. 
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 
insert the SDS-plus

®

 chisel and check if it is 

properly locked. 
When switching from hammer drilling mode to 
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.   

WARNING:

s

 The hammer is only for light chiselling 

applications.

s

The forward/reverse switch must be in 

the forward position when chiselling. 

WARNING:

s

Do not use this tool to mix or pump 

easily com busti ble or explosive fluids 
(ben zine, alcohol, etc.).

s

Do not mix or stir inflammable liquids 

labelled accordingly.

Various types of SDS-plus

®

 drill bits and adaptors 

are available as an option.

Consult your dealer for further information on the 
appropriate accessories.

MAINTENANCE

Your D

E

WALT power tool has been designed to 

operate over a long period of time with a minimum 
of maintenance. Continuous satisfactory operation 
depends upon proper tool care and regular 
cleaning.

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.

This machine is not user-serviceable. Take the 
tool to an authorised D

E

WALT repair agent after 

approximately 40 hours of use. If problems 
occur before this time contact an authorised 
D

E

WALT repair agent. 

The tool will automatically switch off when the 
carbon brushes are worn. 

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