DeWalt XR Li-Ion DCD999 User manual

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1 Battery pack
2 Battery release button
3 Variable speed trigger switch
4 Forward/reverse control button
5 Mode selection collar
6 Keyless chuck
7 Chuck sleeve
8 Speed selector
9 Worklight
10 Worklight switch
11 Belt hook (Optional accessory)
12 Mounting screw
13 Bit clip (Optional accessory)
14 Side handle
15 Main handle
1 Bloc-piles
2 Bouton de libération du bloc-piles
3 Gâchette de vitesse variable
4 Bouton de commande Avancer/Reculer
5 Collier de sélection du mode
6 Mandrin sans clé
7 Douille du mandrin
8 Sélecteur de vitesses
9 Lampe de travail
10 Interrupteur de la lampe de travail
11 Agrafe pour courroie
(accessoireoptionnel)
12 Vis de montage
13 Pince de la mèche (accessoire
optionnel)
14 Poignée latérale
15 Poignée principale
1 Paquete de batería
2 Botón de liberación de batería
3 Gatillo de velocidad variable
4 Botón de control de avance/reversa
5 Collar de selección de modo
6 Mandril sin llave
7 Camisa del mandril
8 Selector de velocidad
9 Luz de trabajo
10 Interruptor de la luz de trabajo
11 Gancho de cinturón
(Accesorioopcional)
12 Tornillo de montaje
13 Sujetador de broca
(Accesorioopcional)
14 Empuñadura lateral
15 Empuñadura principal
Fig. A
DCD999
20V Max* Drill/Driver/Hammerdrill
Perceuses/visseuses/perceuses à percussion 20 V max*
Taladro/Destornillador/Rotomartillo 20 V Máx*
Instruction Manual
Guide D’utilisation
Manual de instrucciones
If you have questions or comments, contact us.
Pour toute question ou tout commentaire, nous contacter.
Si tiene dudas o comentarios, contáctenos. 1-800-4-DeWALT

English (original instructions) 4
Français (traduction de la notice d’instructions originale) 10
Español (traducido de las instrucciones originales) 17
Définitions: symboles et termes
d'alarmes sécurité
Ces guides d'utilisation utilisent les
symboles et termes d'alarmes sécurité
suivants pour vous prévenir de
situations dangereuses et de risques de
dommages corporels ou matériels.
DANGER: indique une situation
dangereuse imminente qui, si elle n’est
pas évitée, entraînera la mort ou des
blessuresgraves.
AVERTISSEMENT: indique
une situation potentiellement
dangereuse qui, si elle n’est pas évitée,
pourrait entraîner la mort ou des
blessuresgraves.
ATTENTION: indique une situation
potentiellement dangereuse qui, si elle
n’est pas évitée, pourrait entraîner des
blessures légères oumodérées.
(Si utilisé sans aucun terme) Indique
un message propre à la sécurité.
AVIS : indique une pratique ne
posant aucun risque de dommages
corporels mais qui par contre, si rien
n’est fait pour l’éviter, pourrait poser
des risques de dommages matériels.
Definiciones: Símbolos y
Palabras de Alerta de Seguridad
Este manual de instrucciones utiliza
los siguientes símbolos y palabras de
alerta de seguridad para alertarle de
situaciones peligrosas y del riesgo de
lesiones corporales o daños materiales.
PELIGRO: Indica una situación
de peligro inminente que, si no
se evita, provocará la muerte o
lesionesgraves.
ADVERTENCIA: Indica una
situación de peligro potencial que, si no
se evita, podría provocar la muerte o
lesionesgraves.
ATENCIÓN:Indica una situación
de peligro potencial que, si no se evita,
posiblemente provocaría lesiones
leves omoderadas.
(Utilizado sin palabras) indica un
mensaje de seguridad relacionado.
AVISO: Se refiere a una práctica no
relacionada a lesiones corporales
que de no evitarse puede resultar en
daños a lapropiedad.
Definitions: Safety Alert Symbols
and Words
This instruction manual uses the
following safety alert symbols and
words to alert you to hazardous
situations and your risk of personal
injury or property damage.
DANGER: Indicates an imminently
hazardous situation which, if not
avoided, will result in death or
seriousinjury.
WARNING: Indicates a potentially
hazardous situation which, if not
avoided, could result in death or
seriousinjury.
CAUTION: Indicates a potentially
hazardous situation which, if not
avoided, may result in minor or
moderateinjury.
(Used without word) Indicates a
safety related message.
NOTICE: Indicates a practice
not related to personal injury
which, if not avoided, may result in
propertydamage.
AVERTISSEMENT: lire tous les
avertissements de sécurité, les
instructions, les illustrations
et les caractéristiques de ce
manuel, y compris les sections
sur les piles et les chargeurs fournies
dans un manuel d’origine de l’outil
ou dans le manuel séparé sur les
piles et les chargeurs. Les manuels
peuvent être obtenus en contactant le
service à la clientèle comme indiqué
ailleurs dans ce manuel. Le fait de ne pas
suivre les avertissements et les
instructions peut entraîner un choc
électrique, un incendie et/ou des
blessures graves.
ADVERTENCIA: Lea todas las
advertencias de seguridad,
instrucciones, ilustraciones y
especificaciones de este
manual, incluyendo las
secciones sobre la batería y el
cargador proporcionadas en un
manual original de la herramienta o
en el manual de Baterías y
Cargadores por separado. Los
manuales se pueden obtener poniéndose
en contacto con el Servicio de atención
al cliente como se describe en otra parte
de este manual. La falla en seguir las
advertencias e instrucciones puede
resultar en descarga eléctrica, incendio
y/o lesiones serias.
WARNING: Read all safety
warnings, instructions,
illustrations, and
specifications in this manual,
including the battery and
charger sections provided in an
original tool manual or the separate
Batteries and Chargers manual.
Manuals can be obtained by contacting
Customer Service as described elsewhere
in this manual. Failure to follow the
warnings and instructions may result in
electric shock, fire and/or serious injury.

17
16
18
Fig. B Fig. C Fig. D
76
1
2
15
14
Fig. E Fig. F
10
9

ENGLISH
4
GENERAL POWER TOOL SAFETY WARNINGS
WARNING: Read all safety warnings, instructions,
illustrations and specifications provided with this power
tool. Failure to follow all instructions listed below may result
in electric shock, fire and/or seriousinjury.
SAVE ALL WARNINGS AND INSTRUCTIONS FOR
FUTUREREFERENCE.
The term “power tool” in the warnings refers to your
mains‑operated (corded) power tool or battery‑operated
(cordless) powertool.
1) Work Area Safety
a ) Keep work area clean and well lit. Cluttered or dark
areas inviteaccidents.
b ) Do not operate power tools in explosive
atmospheres, such as in the presence of flammable
liquids, gases or dust. Power tools create sparks which may
ignite the dust orfumes.
c ) Keep children and bystanders away while operating
a power tool. Distractions can cause you to losecontrol.
2) Electrical Safety
a ) Power tool plugs must match the outlet. Never
modify the plug in any way. Do not use any adapter
plugs with earthed (grounded) power tools. Unmodified
plugs and matching outlets will reduce risk of electricshock.
b ) Avoid body contact with earthed or grounded
surfaces, such as pipes, radiators, ranges and
refrigerators. There is an increased risk of electric shock if
your body is earthed orgrounded.
c ) Do not expose power tools to rain or wet conditions.
Water entering a power tool will increase the risk of
electricshock.
d ) Do not abuse the cord. Never use the cord for
carrying, pulling or unplugging the power tool. Keep
cord away from heat, oil, sharp edges or moving parts.
Damaged or entangled cords increase the risk of electricshock.
e ) When operating a power tool outdoors, use an
extension cord suitable for outdoor use. Use of a cord
suitable for outdoor use reduces the risk of electricshock.
f ) If operating a power tool in a damp location is
unavoidable, use a ground fault circuit interrupter
(GFCI) protected supply. Use of a GFCI reduces the risk of
electricshock.
3) Personal Safety
a ) Stay alert, watch what you are doing and use
common sense when operating a power tool. Do not
use a power tool while you are tired or under the
influence of drugs, alcohol or medication. A moment of
inattention while operating power tools may result in serious
personalinjury.
b ) Use personal protective equipment. Always wear
eye protection. Protective equipment such as a dust mask,
Intended Use
This drill/driver/hammerdrill is designed for professional
drilling, screwdriving and hammerdrillingapplications.
DO NOT use under wet conditions or in presence of
flammable liquids orgases.
DO NOT let children come into contact with the tool.
Supervision is required when inexperienced operators use
thistool.
non‑skid safety shoes, hard hat, or hearing protection used for
appropriate conditions will reduce personalinjuries.
c ) Prevent unintentional starting. Ensure the switch
is in the off‑position before connecting to power
source and/or battery pack, picking up or carrying
the tool. Carrying power tools with your finger on the
switch or energizing power tools that have the switch on
invitesaccidents.
d ) Remove any adjusting key or wrench before turning
the power tool on. A wrench or a key left attached to a
rotating part of the power tool may result in personalinjury.
e ) Do not overreach. Keep proper footing and balance
at all times. This enables better control of the power tool in
unexpectedsituations.
f ) Dress properly. Do not wear loose clothing or jewelry.
Keep your hair, clothing and gloves away from moving
parts. Loose clothes, jewelry or long hair can be caught in
movingparts.
g ) If devices are provided for the connection of dust
extraction and collection facilities, ensure these are
connected and properly used. Use of dust collection can
reduce dust‑relatedhazards.
h ) Do not let familiarity gained from frequent use of
tools allow you to become complacent and ignore tool
safety principles. A careless action can cause severe injury
within a fraction of asecond.
4) Power Tool Use and Care
a ) Do not force the power tool. Use the correct power
tool for your application. The correct power tool will do the
job better and safer at the rate for which it wasdesigned.
b ) Do not use the power tool if the switch does not turn
it on and off. Any power tool that cannot be controlled with
the switch is dangerous and must berepaired.
c ) Disconnect the plug from the power source and/
or remove the battery pack, if detachable, from the
power tool before making any adjustments, changing
accessories, or storing power tools. Such preventive
safety measures reduce the risk of starting the power
toolaccidentally.
d ) Store idle power tools out of the reach of children
and do not allow persons unfamiliar with the power tool
or these instructions to operate the power tool. Power
tools are dangerous in the hands of untrainedusers.
e ) Maintain power tools and accessories. Check for
misalignment or binding of moving parts, breakage
of parts and any other condition that may affect the
power tool’s operation. If damaged, have the power tool
repaired before use. Many accidents are caused by poorly
maintained powertools.
f ) Keep cutting tools sharp and clean. Properly
maintained cutting tools with sharp cutting edges are less
likely to bind and are easier tocontrol.
g ) Use the power tool, accessories and tool bits etc. in
accordance with these instructions, taking into account
the working conditions and the work to be performed.
Use of the power tool for operations different from those
intended could result in a hazardoussituation.
h ) Keep handles and grasping surfaces dry, clean and
free from oil and grease. Slippery handles and grasping
English (original instructions)

5
ENGLISH
Additional Safety Information
WARNING: Never modify the power tool or any part of it.
Damage or personal injury couldresult.
WARNING: ALWAYS use safety glasses. Everyday
eyeglasses are NOT safety glasses. Also use face or dust
mask if cutting operation is dusty. ALWAYS WEAR CERTIFIED
SAFETYEQUIPMENT:
• ANSI Z87.1 eye protection (CAN/CSA Z94.3),
• ANSI S12.6 (S3.19) hearing protection,
• NIOSH/OSHA/MSHA respiratoryprotection.
WARNING: Some dust created by power sanding, sawing,
grinding, drilling, and other construction activities contains
chemicals known to the State of California to cause cancer,
birth defects or other reproductive harm. Some examples of
these chemicalsare:
• lead from lead‑based paints,
• crystalline silica from bricks and cement and other masonry
products, and
• arsenic and chromium from chemically‑treatedlumber.
Your risk from these exposures varies, depending on how
often you do this type of work. To reduce your exposure to
these chemicals: work in a well ventilated area, and work with
approved safety equipment, such as those dust masks that are
specially designed to filter out microscopicparticles.
• Wear protective clothing and wash exposed areas
with soap and water. Allowing dust to get into your
mouth, eyes, or lay on the skin may promote absorption of
harmfulchemicals. Direct particles away from face andbody.
• Use the appropriate dust extractor vacuum to remove
the vast majority of static and airborne dust. Failure
to remove static and airborne dust could contaminate the
working environment or pose an increased health risk to the
operator and those in closeproximity.
• Use clamps or other practical ways to secure and
support the workpiece to a stable platform. Holding the
work by hand or against your body is unstable and may lead
to loss ofcontrol andinjury.
• Air vents often cover moving parts and should be
avoided. Loose clothes, jewelry or long hair can be caught in
movingparts.
CAUTION: When not in use, place tool on its side
on a stable surface where it will not cause a tripping
or falling hazard. Some tools with large battery packs
Additional Safety Warnings for Drills
• Do not operate this tool for long periods of time.
Vibration caused by the operating action of this tool may
cause permanent injury to fingers, hands, and arms. Use
gloves to provide extra cushion, take frequent rest periods, and
limit daily time ofuse.
• Hammer bits and tools get hot during operation. Wear
gloves when touchingthem.
DRILL/DRIVER/HAMMERDRILL SAFETYWARNINGS
1) Safety Instructions for All Operations
a ) Wear ear protectors when impact drilling. Exposure to
noise can cause hearing loss.
b) Use the auxiliary handle(s). Loss of control can cause
personal injury.
c ) Brace the tool properly before use. This tool produces
a high output torque and without properly bracing the
tool during operation, loss of control may occur resulting in
personalinjury.
d ) Hold the power tool by insulated gripping surfaces,
when performing an operation where the cutting
accessory or fasteners may contact hidden wiring.
Cutting accessory contacting a “live” wire may make exposed
metal parts of the power tool “live” and could give the
operator an electricshock.
2) Safety Instructions When Using Long
DrillBits
a ) Never operate at higher speed than the maximum
speed rating of the drill bit. At higher speeds, the bit is likely
surfaces do not allow for safe handling and control of the tool
in unexpectedsituations.
5) Battery Tool Use and Care
a ) Recharge only with the charger specified by the
manufacturer. A charger that is suitable for one type of
battery pack may create a risk of fire when used with another
batterypack.
b ) Use power tools only with specifically designated
battery packs. Use of any other battery packs may create a
risk of injury andfire.
c ) When battery pack is not in use, keep it away from
other metal objects, like paper clips, coins, keys, nails,
screws or other small metal objects, that can make a
connection from one terminal to another. Shorting the
battery terminals together may cause burns or afire.
d ) Under abusive conditions, liquid may be ejected
from the battery; avoid contact. If contact accidentally
occurs, flush with water. If liquid contacts eyes,
additionally seek medical help. Liquid ejected from the
battery may cause irritation orburns.
e ) Do not use a battery pack or tool that is damaged
or modified. Damaged or modified batteries may exhibit
unpredictable behavior resulting in fire, explosion or risk
ofinjury.
f ) Do not expose a battery pack or tool to fire or
excessive temperature. Exposure to fire or temperature
above 265°F (130°C) may causeexplosion.
g ) Follow all charging instructions and do not charge
the battery pack or tool outside the temperature range
specified in the instructions. Charging improperly or at
temperatures outside the specified range may damage the
battery and increase the risk of fire.
6) Service
a ) Have your power tool serviced by a qualified repair
person using only identical replacement parts. This will
ensure that the safety of the power tool ismaintained.
b ) Never service damaged battery packs. Service of
battery packs should only be performed by the manufacturer
or authorized serviceproviders.
to bend if allowed to rotate freely without contacting the
workpiece, resulting in personalinjury.
b ) Always start drilling at low speed and with the bit tip
in contact with the workpiece. At higher speeds, the bit is
likely to bend if allowed to rotate freely without contacting the
workpiece, resulting in personalinjury.
c ) Apply pressure only in direct line with the bit and
do not apply excessive pressure. Bits can bend causing
breakage or loss of control, resulting in personalinjury.

ENGLISH
6
Proper Hand Position (Fig. D)
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.
Installing and Removing the Battery Pack (Fig.C)
NOTE: For best results, make sure your battery pack is
fullycharged.
To install the battery pack1 into the tool handle, align the
battery pack with the rails inside the tool’s handle and slide
it into the handle until the battery pack is firmly seated in
the tool and ensure that it does notdisengage.
To remove the battery pack from the tool, press the release
button2 and firmly pull the battery pack out of the tool
handle. Insert it into the charger.
OPERATION
WARNING: To reduce the risk of serious personal
injury, turn unit off and remove the battery pack
before making any adjustments or removing/installing
attachments or accessories. An accidental start‑up can
causeinjury.
Speed Selection (Fig. A)
The tool features three speed settings for greaterversatility.
NOTE: Do not change speeds when the tool is running.
Always allow the tool to come to a complete stop before
changingspeed.
• To select speed 1 (highest torque setting), turn the tool
off and permit it to stop. Slide the speed selector8 all the
way forward.
• Speed 2 (middle torque and speed setting) is in the
middle position.
• Speed 3 (highest speed setting) is to therear.
If the tool does not change speeds, confirm that the
speed selector is completely engaged in the forward or
backposition.
If trouble shifting gears persists, depress and release the
trigger switch and try again.
Mode Selection (Fig. A)
The mode selection collar5 can be used to select
the correct operating mode depending upon the
plannedapplication.
To select, rotate the collar until the desired symbol aligns
with thearrow.
WARNING: When the mode selection collar is in the drill
or hammerdrill positions, the drill will not clutch. The drill may
stall if overloaded, causing a suddentwist.
Symbol Mode
Drilling
1-11 Screwdriving (higher number = greater torque)
Hammerdrilling
Installing a Bit or Accessory into a Keyless Chuck
(Fig. B)
WARNING: Do not attempt to tighten drill bits (or any
other accessory) by gripping the front part of the chuck and
turning the tool on. Damage to the chuck and personal injury
may result. Always lock off trigger switch and disconnect tool
from power source when changingaccessories.
WARNING: Always ensure the bit is secure before starting
the tool. A loose bit may eject from tool causing possible
personalinjury.
To insert a drill bit or other accessory, follow thesesteps.
1. Turn tool off and remove batterypack.
2. Grasp the black sleeve of the chuck with one hand
and use the other hand to secure the tool. Rotate the
sleeve counterclockwise far enough to accept the
desiredaccessory.
3. Insert the accessory about 3/4" (19 mm) into the
chuck6 and tighten securely by grasping and rotating the
chuck sleeve 7 clockwise with one hand while holding the
tool with the other. When the chuck is nearly tightened
you will hear a clicking sound. After 8-12 clicks the chuck
is securely tightened around the accessory. Your tool is
Side Handle (Fig.A)
WARNING: To reduce the risk of personal injury, ALWAYS
operate the tool with the side handle properly installed.
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.
Side handle14 clamps to the front of the gear case and
may be rotated 360° to permit right- or left-hand use. Side
handle must be tightened sufficiently to resist the twisting
action of the tool if the accessory binds or stalls. Be sure to
grip the side handle at the far end to control the tool during
astall.
ASSEMBLY AND ADJUSTMENTS
WARNING: To reduce the risk of serious personal
injury, turn unit off and remove the battery pack
before making any adjustments or removing/installing
attachments or accessories. An accidental start‑up can
causeinjury.
The label on your tool may include the following symbols. The
symbols and their definitions are asfollows:
BPM.................... beats per minute
V.........................volts
min.....................minutes
jor DC............direct current
…/min..............per minute
RPM....................revolutions per
minute
A.........................amperes
Hz .......................hertz
W........................watts
Wh...................... watt hours
no.......................no load speed
n.........................rated speed
c.....................safety alert symbol
h.....................wear respiratory
protection
f.....................wear eye
protection
i.....................Class II
Construction
(double insulated)
g.....................wear hearing
protection
a.....................read all
documentation
n.....................avoid staring at
light
lor AC............alternating current
Ah....................... amp hours
will stand upright on the battery pack but may be easily
knockedover.
equipped with an automatic spindle lock mechanism. This
allows you to open and close the chuck with onehand.
Be sure to tighten chuck with one hand on the chuck sleeve
and one hand holding the tool for maximumtightness.
To release the accessory, repeat steps 1 and 2above.

7
ENGLISH
Recommendations for Drilling
• When drilling, always apply pressure in a straight line with
the bit, but do not push hard enough to stall the motor or
deflect thebit.
• IF THE DRILL STALLS:
‑RELEASE TRIGGER SWITCH IMMEDIATELY, remove drill
bit from work, and determine cause ofstalling.
‑DO NOT DEPRESS TRIGGER SWITCH ON AND OFF 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.
Spotlight Mode
The high setting is the spotlight mode 10. The spotlight
will run for 20 minutes after the trigger switch is released.
Two minutes before the spotlight will shut off, it will flash
twice and then dim. To avoid the spotlight shutting off,
lightly tap the triggerswitch.
WARNING: While using the worklight in medium or
spotlight mode, do not stare at the light or place the
drill in a position which may cause anyone to stare into
the light. Serious eye injury couldresult.
CAUTION: When using the tool as a spotlight, be sure it is
secured on a stable surface where it will not cause a tripping
or fallinghazard.
CAUTION: Remove all accessories from the chuck before
using the drill as a spotlight. Personal injury or property
damage couldresult.
Worklight (Fig.E)
The worklight 9 is activated when the trigger switch is
depressed, and will automatically turn off after the trigger
switch is released. If the trigger switch remains depressed,
the worklight will remainon.
NOTE: The worklight is for lighting the immediate work
surface and is not intended to be used as aflashlight.
Variable Speed Trigger and Forward/Reverse
Control Button (Fig. A)
The tool is turned on and off by pulling and releasing
the variable speed trigger 3 . The farther the trigger is
depressed, the higher the speed of the tool. Your tool is
equipped with a brake. The chuck will stop as soon as the
trigger switch is fullyreleased.
A forward/reverse control button 4 determines the
rotational direction of the tool and also serves as a
lock-offbutton.
• To select forward rotation (clockwise), release the trigger
and depress the forward/reverse control button on the right
side of thetool.
• To select reverse (counterclockwise), depress the forward/
reverse control button on the left side of thetool.
NOTE: The center position of the control button locks the
tool in the off position. When changing the position of the
control button, be sure the trigger isreleased.
NOTE: Continuous use in variable speed range is not
recommended. It may damage the switch and should
beavoided.
NOTE: The first time the tool is run after changing the
direction of rotation, you may hear a click on start up. This is
normal and does not indicate aproblem.
Proper hand position requires one hand on the main
handle 15, with the other hand on the side handle14 to
control the twisting action of thedrill.
Low Battery Warning
When in spotlight mode and the battery is nearing
complete discharge, the spotlight will flash twice and then
dim. After two minutes, the battery will be completely
discharged and the drill will immediately shut down. At this
point, replace with a freshbattery.
WARNING:To reduce the risk of injury, always have
a back‑up battery or secondary lighting available if the
situation warrantsit.
Performing an Application (Fig.A)
WARNING: To reduce the risk of personal injury,
ALWAYS ensure workpiece is anchored or clampedfirmly.
WARNING: Always wait until the motor has come to a
complete standstill before changing the direction ofrotation.
Prior to Performing Work
• Set the speed selector8. Refer to SpeedSelection.
• Install the appropriate bit or accessory into the chuck.
Refer to Installing a Bit or Accessory into a KeylessChuck.
WARNING:
• Do not use this tool to mix or pump easily combustible or
explosive fluids (benzine, alcohol,etc.).
• Do not mix or stir flammable liquids labeledaccordingly.
Screwdriving
Your tool has a clutch with adjustable torque for driving
and removing a wide array of fastener shapes and sizes. The
numbers 1–11 on the mode selection collar5 are used to
set a torque range for screwdriving. The higher the number
on the collar, the higher the torque and the larger the
fastener which can bedriven.
1. Turn the mode selection collar5 to the desiredposition.
Refer to Mode Selection.
2. Pull the trigger switch applying pressure in a straight line
with the bit until the fastener is seated at the desired depth
in theworkpiece.
Recommendations for Screwdriving
• Start with lower torque settings, then advance to
higher torque settings to avoid damage to the workpiece
orfastener.
• Make some practice runs in scrap or on unseen areas
of the workpiece to determine the proper position of the
mode selectioncollar.
Drilling
1. Turn the mode selection collar 5 to the drillsymbol.
Refer to ModeSelection.
2. Place drill bit in contact with theworkpiece.
NOTE: Use sharp drill bitonly.
3. Pull the trigger switch applying pressure in a straight line
with the bit until it reaches the desireddepth.
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.
4. Keep the motor running when pulling the bit back out of
a drilled hole to preventjamming.

ENGLISH
8
Repairs
The charger and battery pack are notserviceable. There are
no serviceable parts inside the charger or batterypack.
WARNING: To assure product SAFETY and RELIABILITY,
repairs, maintenance and adjustment (including brush
inspection and replacement, when applicable) should
be performed by a DeWALT factory service center or a
DeWALT authorized service center. Always use identical
replacementparts.
Accessories
WARNING: Since accessories, other than those offered by
DeWALT,have not been tested with this product, use of such
accessories with this tool could be hazardous. To reduce the
risk of injury, only DeWALT recommended accessories should
be used with thisproduct.
Recommended accessories for use with your tool are
available at extra cost from your local dealer or authorized
service center. If you need assistance in locating any
accessory, please contact DeWALT; call 1-800-4-DeWALT
(1-800-433-9258) or visit our website: www.dewalt.com.
Cleaning
WARNING: Blow dirt and dust out of all air vents with
clean, dry air at least once a week. To minimize the risk of eye
injury, always wear ANSI Z87.1approved eye protection when
performingthisprocedure.
WARNING: Never use solvents or other harsh chemicals
for cleaning the non‑metallic parts of the tool. These
chemicals may weaken the plastic materials used in these
parts. Use a cloth dampened only with water and mild soap.
Never let any liquid get inside the tool; never immerse any part
of the tool into aliquid.
MAINTENANCE
WARNING: To reduce the risk of serious personal
injury, turn unit off and remove the battery pack
before making any adjustments or removing/installing
attachments or accessories. An accidental start‑up can
causeinjury.
• Large holes (5/16" to 1/2" [7.9 mm to 12.7 mm]) in steel
can be made easier if a pilot hole (5/32" to 3/16" [4 mm to
4.8 mm]) is drilledfirst.
• If drilling thin material or material that is prone to
splinter, use a wood “back-up” block to prevent damage to
theworkpiece.
Hammerdrilling
IMPORTANT: Use carbide-tipped or masonry bits rated for
percussion drillingonly.
1. Select the desired speed/torque range using the
speed selector8 to match the speed and torque to the
planned operation. Turn the mode selection collar5 to the
hammerdrillsymbol.
2. Pull the trigger, applying just enough pressure on the
hammer to keep it from bouncing excessively or "rising" off
the bit.
Recommendations for Hammerdrilling
• Too much force will cause slower drilling speeds,
overheating, and a lower drillingrate.
• A smooth even flow of material indicates the proper
drillingrate.
• 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.
• 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.
Tool Connect™ Chip (Fig. F)
WARNING: To reduce the risk of injury, remove
accessories from the tool chuck before any Tool
Connect™interaction.
Your tool is Tool Connect™ Chip ready and has a location for
installation of a Tool Connect™ Chip.
Tool Connect™ Chip is an optional application for your
smart device (such as a smart phone or tablet) that connects
the device to utilize the mobile application for inventory
management functions.
Refer to Tool Connect™Chip Instruction Sheet for
moreinformation.
Installing the Tool Connect™ Chip
1. Remove the retaining screws 16 that hold the Tool
Connect™ Chip protective cover 17 into the tool.
2. Remove the protective cover and insert the Tool
Connect™ Chip into the empty pocket 18 .
3. Ensure that the Tool Connect™ Chip is flush with the
housing. Secure it with the retaining screws and tighten the
screws.
4. Refer to Tool Connect™Chip Instruction Sheet for
further instructions.
Belt Hook and Bit Clip (Fig. A)
Optional Accessory
WARNING:To reduce the risk of serious personal
injury, ONLY use the tool’s belt hook to hang the tool
from a work belt. DO NOT use the belt hook for tethering
or securing the tool to a person or object during use. DO NOT
suspend tool overhead or suspend objects from the belthook.
WARNING:To reduce the risk of serious personal
injury, ensure the screw holding the belt hook issecure.
IMPORTANT: When attaching or replacing the belt hook or
bit clip, use only the screw12 that is provided. Be sure to
securely tighten thescrew.
The belt hook11 and bit clip13 can be attached to
either side of the tool using only the screw12 provided, to
accommodate left- or right-handed users. If the belt hook
or bit clip is not desired at all, they can be removed from
thetool.
To move the belt hook or bit clip, remove the screw that
holds it in place then reassemble on the opposite side. Be
sure to securely tighten thescrew.
Register Online
Thank you for your purchase. Register your product nowfor:
• WARRANTY SERVICE: Registering your product will help
you obtain more efficient warranty service in case there is a
problem with yourproduct.
• CONFIRMATION OF OWNERSHIP: In case of an
insurance loss, such as fire, flood or theft, your registration of
ownership will serve as your proof ofpurchase.

9
ENGLISH
Three‑Year Limited Warranty
For warranty terms, go to https://www.dewalt.com/
support/warranty.
To request a written copy of the warranty terms, contact:
Customer Service at DeWALT Industrial Tool Co., 701East
Joppa Road, Towson, MD 21286or call 1-800-4-DeWALT
(1-800-433-9258).
LATIN AMERICA: This warranty does not apply to products
sold in Latin America. For products sold in Latin America,
see country-specific warranty information contained in
the packaging, call the local company or see website for
warrantyinformation.
FREE WARNING LABEL REPLACEMENT: If your warning
labels become illegible or are missing, call 1-800-4-DeWALT
(1-800-433-9258) for a freereplacement.
MAXIMUM RECOMMENDED CAPACITIES
DCD999
WOOD
Auger 1–1/4" (32 mm)
Paddle 1–1/2" (38 mm)
Twist 1/2" (13 mm)
Self-feed 2–9/16" (65 mm)
Hole saw 4" (100 mm)
METAL
Twist 1/2" (13 mm)
Hole saw 1–3/8" (35 mm)
MASONRY
Carbide 1/2" (13 mm)
• FOR YOUR SAFETY: Registering your product will allow
us to contact you in the unlikely event a safety notification is
required under the Federal Consumer SafetyAct.
• Register online at www.dewalt.com.