DeWalt DW999 Instruction Manual

INSTRUCTION MANUAL
GUIDE D'UTILISATION
MANUAL DE INSTRUCCIONES

DW999
18 Volt 7/8" Cordless Rotary Hammer

Perceuse à percussion sans fil á 18 volt 22 mm (7/8 po)
Rotomartillos inalámbricas 18 volt 22 mm (7/8")

INSTRUCTIVO DE OPERACIÓN, CENTROS DE SERVICIO Y PÓLIZA
DE GARANTÍA. ADVERTENCIA: LÉASE ESTE INSTRUCTIVO ANTES
DE USAR EL PRODUCTO.

Questions? See us on the World Wide Web at www.dewalt.com

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English

F YOU HAVE ANY QUESTIONS OR COMMENTS ABOUT THIS OR
ANY D

EWALT TOOL, CALL US TOLL FREE AT:

1-800-4-DEWALT (1-800-433-9258)

General Safety Rules – For All Battery
Operated Tools

WARNING! Read and understand all instructions. Failure to
follow all instructions listed below may result in electric shock, fire
and/or serious personal injury.

SAVE THESE INSTRUCTIONS

WORK AREA

• Keep your work area clean and well lit. Cluttered benches and

dark areas invite accidents.

• 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.

• Keep bystanders, children, and visitors away while operating

a power tool. Distractions can cause you to lose control.

ELECTRICAL SAFETY

• Do not abuse the cord. Never use the cord to carry the tool.
Keep cord away from heat, oil, sharp edges or moving parts.

Replace damaged cords immediately. Damaged cords may create
a fire.

• A battery operated tool with integral batteries or a separate

battery pack must be recharged only with the specified charger
for the battery. A charger that may be suitable for one type of

battery may create a risk of fire when used with another battery.

• Use battery operated tool only with the specifically
designated battery pack. Use of any other batteries may create a
risk of fire.

PERSONAL SAFETY

• Stay alert, watch what you are doing and use common sense
when operating a power tool. Do not use tool while tired or

under the influence of drugs, alcohol, or medication. A

moment of inattention while operating power tools may result in
serious personal injury,

• Dress properly. Do not wear loose clothing or jewelry. Contain

long hair. Keep your hair, clothing, and gloves away from
moving parts. Loose clothing, jewelry, or long hair can be caught

in moving parts. Air vents often cover moving parts and should also
be avoided.

• Avoid accidental starting. Be sure switch is in the locked or
off position before inserting battery pack. Carrying tools with
your finger on the switch or inserting the battery pack into a tool
with the switch on invites accidents.

• Remove adjusting keys or wrenches before turning the tool
on. A wrench or a key that is left attached to a rotating part of the
tool may result in personal injury.

• Do not overreach. Keep proper footing and balance at all
times. Proper footing and balance enables better control of the tool
in unexpected situations.

• Use safety equipment. Always wear eye protection. Dust mask,
non-skid safety shoes, hard hat, or hearing protection must be
used for appropriate conditions.

TOOL USE AND CARE

• Use clamps or other practical way 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 a loss of control.

• Do not force tool. Use the correct tool for your application.
The correct tool will do the job better and safer at the rate for which
it is designed.

• Do not use tool if switch does not turn it on or off. A tool that
cannot be controlled with the switch is dangerous and must be
repaired.

• Disconnect battery pack from tool or place the switch in the

locked or off position before making any adjustments,
changing accessories, or storing the tool. Such preventative

safety measures reduce the risk of starting the tool accidentally.

• Store idle tools out of reach of children and other untrained
persons. Tools are dangerous in the hands of untrained users.

• 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 sparks, burns, or a fire.

• Maintain tools with care. Keep cutting tools sharp and clean.
Properly maintained tools, with sharp cutting edges are less likely
to bind and are easier to control.

• Check for misalignment or binding of moving parts, breakage

of parts, and any other condition that may affect the tools
operation. If damaged, have the tool serviced before using.

Many accidents are caused by poorly maintained tools.

• Use only accessories that are recommended by the
manufacturer for your model. Accessories that may be suitable
for one tool, may create a risk of injury when used on another tool.

SERVICE

• Tool service must be performed only by qualified repair
personnel. Service or maintenance performed by unqualified

personnel may result in a risk of injury.

• When servicing a tool, use only identical replacement parts.

Follow instructions in the Maintenance section of this manual.

Use of unauthorized parts or failure to follow Maintenance
Instructions may create a risk of shock or injury.

Additional Specific Safety Rules for
Rotary Hammers

• Hold tools by insulated gripping surfaces when performing an
operation where the cutting tool may contact hidden wiring.

Contact with a “live” wire will make exposed metal parts of the tool
“live” and shock the operator.

• Wear safety goggles or other eye protection. Hammering and
drilling operations cause chips to fly. Flying particles can cause
permanent eye damage.

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English

• Always use the side handle supplied with the tool. Keep a firm
grip on the tool at all times. Do not attempt to operate this tool

without holding it with both hands. Operating this tool with one
hand will result in a loss of control.

• Do not use chisels in any of the rotation modes. Chisel may
jam causing loss of control.

• Wear gloves when handling hammer bits and tools. Hammer
bits and tools get hot during operation.

CAUTION: Wear appropriate personal hearing protection during

use. Under some conditions and duration of use, noise from this

product may contribute to hearing loss.

CAUTION: Some tools with large battery packs will stand upright

on the battery pack but may be easily knocked over. When not in use,
place tool on its side on a stable surface where it will not cause a
tripping or falling hazard.

CAUTION: DO NOT TOUCH ANY METAL PARTS OF THE TOOL

when drilling or driving into walls, floors or wherever live electrical wires
may be encountered! Hold the tool only by insulated grasping surfaces
to prevent electric shock if you drill or drive into a live wire.

WARNING: Some dust created by power sanding, sawing, grinding,

drilling, and other construction activities contains chemicals known 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 (CCA).

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.

• Avoid prolonged contact with dust from power sanding,

sawing, grinding, drilling, and other construction activities.
Wear protective clothing and wash exposed areas with soap

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and water. Allowing dust to get into your mouth, eyes, or lay on the
skin may promote absorption of harmful chemicals.

• The label on your tool may include the following symbols.

V..............volts A ............amperes

Hz............hertz W ..........watts

min ..........minutes ..........alternating current

........direct current no..........no load speed

............Class II Construction ..........earthing terminal

..........safety alert symbol .../min ....revolutions per minute

Important Safety Instructions for

Battery Packs

The battery pack is not fully charged out of the carton! First read the
safety instructions below. Then follow charging notes and procedures.

• Do not incinerate the battery pack even if it is severely

damaged or is completely worn out. The battery pack can
explode in a fire.

• A small leakage of liquid from the battery pack cells may

occur under extreme usage or temperature conditions. This
does not indicate a failure. However, if the outer seal is broken
and this leakage gets on your skin:
a. Wash quickly with soap and water.
b. Neutralize with a mild acid such as lemon juice or vinegar.
c. If battery liquid gets into your eyes, flush them with clean water for

a minimum of 10 minutes and seek immediate medical attention.
(Medical note: The liquid is 25-35% solution of potassium
hydroxide.)

• Do not carry extra battery packs in aprons, pockets, or tool

boxes along with other metal objects. Battery pack could be
short circuited causing damage to the battery pack and possibly
causing severe burns or fire.

• Charge the battery packs only in D

EWALT chargers.

• NOTE: The batteries in your battery pack are the nickel–cadmium

type. Cadmium is considered to be a toxic material by the Environ­mental Protection Agency. Before disposing of damaged or worn

out Nickel–Cadmium battery packs, check with your state
Environmental Protection Agency to find out about special
restrictions on the disposal of these battery packs or return them to
a D

EWALT certified service center for recycling.

•

DO NOT store or use the tool and battery pack in locations where
the temperature may reach or exceed 105°F (such as outside
sheds or metal buildings in summer).

DANGER: Never attempt to open the battery pack for any reason.

If battery pack case is cracked or damaged, do not insert into
charger. Danger of electric shock or electrocution. Damaged
battery packs should be returned to service center for recycling.

NOTE: Battery storage and carrying caps are provided for use
whenever the battery is out of the tool or charger. Remove cap before
placing battery in charger or tool.

WARNING: Do not store or carry battery so that

metal objects can contact exposed battery terminals.

For example, do not place battery in aprons, pockets, tool
boxes, product kit boxes, drawers, etc. with loose nails,
screws, keys, etc. without battery cap. Without cap in
place, battery could short circuit causing fire or burns or
damage to battery.

The RBRC™ Seal

The RBRC™ (Rechargeable Battery Recycling Corpora
tion) Seal on the nickel-cadmium battery (or battery pack)
indicates that the costs to recycle the battery (or battery
pack) at the end of its useful life have already been paid
by D

EWALT. In some areas, it is illegal to place spent

nickel-cadmium batteries in the trash or municipal solid
waste stream and the RBRC program provides an environmentally
conscious alternative.

RBRC in cooperation with D

EWALT and other battery users, has

established programs in the United States to facilitate the collection of
spent nickel-cadmium batteries. Help protect our environment and
conserve natural resources by returning the spent nickel-cadmium
battery to an authorized D

EWALT service center or to your local retailer

English

WARNING: Don’t allow any liquid to get inside charger. Electric

shock may result.

• The charger and battery pack are specifically designed to
work together. DO NOT attempt to charge the battery pack with
any chargers other than the ones in this manual.

• These chargers are not intended for any uses other than charging
D

EWALT rechargeable batteries. Any other uses may result in risk

of fire, electric shock or electrocution.

• To reduce risk of damage to electric plug and cord, pull by plug
rather than cord when disconnecting charger.

• Make sure cord is located so that it will not be stepped on, tripped
over, or otherwise subjected to damage or stress.

• An extension cord should not be used unless absolutely necessary.
Use of improper extension cord could result in risk of fire, electric
shock, or electrocution.

• An extension cord must have adequate wire size (AWG or
American Wire Gauge) for safety. The smaller the gauge number of
the wire, the greater the capacity of the cable, that is 16 gauge has
more capacity than 18 gauge. When using more than one
extension to make up the total length, be sure each individual
extension contains at least the minimum wire size.

Recommended Minimum AWG Size for Extension Cords

Total Extension Cord Length (feet)
25 50 75 100 125 150 175
Wire Gauge
18 18 16 16 14 14 12

• The charger is ventilated through slots in the top and the bottom of
the housing. Do not place any object on top of charger or place the
charger on a soft surface that might block the ventilation slots and
result in excessive internal heat. Place the charger in a position
away from any heat source.

• Do not operate charger with damaged cord or plug — have them
replaced immediately.

• Do not operate charger if it has received a sharp blow, been
dropped, or otherwise damaged in any way; take it to an authorized
service center.

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for recycling. You may also contact your local recycling center for
information on where to drop off the spent battery.

Installing and Removing the Battery
Pack (Fig. 1)

NOTE: Make sure your battery
pack is fully charged. To install
the battery pack into the tool
handle, align the base of the tool
with the notch inside the tool’s
handle and slide the battery pack
firmly into the handle until you
hear the lock snap into place.

To remove the battery pack from the tool, press the release buttons
and firmly pull the battery pack out of the tool handle. Insert it into the
charger as described in the Charging Procedures section.

Important Safety Instructions for Battery
Chargers

SAVE THESE INSTRUCTIONS - This manual contains important
safety instructions for D

EWALT battery chargers.

• Before using battery charger, read all instructions and cautionary
markings on battery charger, battery and product using battery.
CAUTION:To reduce the risk of injury, charge only D

EWALT nickel

cadmium rechargeable batteries. Other types of batteries may
burst causing personal injury and damage.
CAUTION: Under certain conditions, with the charger plugged in to
the power supply, the exposed charging contacts inside the charger
can be shorted by foreign material. Foreign materials of a
conductive nature such as, but not limited to, steel wool, aluminum
foil, or any buildup of metallic particles should be kept away from
charger cavities. Always unplug the charger from the power supply
when there is no battery pack in the cavity. Unplug charger before
attempting to clean.
DANGER: 120 volts present at charging terminals. Do not probe
with conductive objects. Danger of electric shock or electrocution.

FIG. 1

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• Do not disassemble charger; take it to an authorized service center
when service or repair is required. Incorrect reassembly may result
in a risk of electric shock, electrocution or fire.

• To reduce risk of electric shock, unplug charger from outlet before
attempting any cleaning. Removing the battery pack will not reduce
this risk.

• NEVER attempt to connect 2 chargers together.

• The charger is designed to operate on standard household electrical
power (120 Volts AC). Do not attempt to use it on any other voltage!
This does not apply to vehicular charger.

Chargers

Your battery can be charged in DEWALT 1 Hour Chargers, 15 Minute
Chargers or Vehicular 12 volt charger. Be sure to read all safety
instructions before using your charger.

Consult chart on back cover for compatibility of chargers and battery
packs.

Charging Procedure

1 HOUR CHARGERS

1. Plug the charger into an appropriate power outlet.

2. Insert the battery pack into the charger, as shown in FIG.2, making
sure the pack is fully seated in the charger. The red (charging) light
will blink continuously indicating that the charging process has
started.

3. The battery pack will be fully charged in about 1 hour. The
completion of charge will be indicated by the red light remaining ON
continuously. The pack is fully charged and may be used at this time
or left in the charger.

TROUBLE INDICATORS: These chargers are designed to detect
certain problems that can arise with battery packs which would be
indicated by the red light flashing at a fast rate (and continuous beeping
for 15 Minute Chargers). If this occurs, re-insert battery pack. If
problem persists, try a different battery pack to determine if the charger
is OK. If the new pack charges correctly, then the original pack is
defective and should be returned to a service center for recycling. If the
new battery pack elicits the same trouble indication as the original,
have charger tested at an authorized service center.

PROBLEM POWER LINE

If your charger has a Problem Power Line indicator: When the charger
‘is used with some portable power sources such as generators or
sources that convert DC to AC, the charger may temporarily suspend
operation, flashing the red light with two fast blinks followed by a

pause. This indicates the power source is out of limits.
HOT PACK DELAY

If your charger has a Hot Pack Delay feature: When the charger detects
a battery that is hot, it automatically starts a Hot Pack Delay, suspending
charging until the battery has cooled. After the battery has cooled, the
charger automatically switches to the Pack Charging mode. This
feature ensures maximum battery life. The red light flashes long, then
short while in the Hot Pack Delay mode.

15 MINUTE CHARGERS

1. Plug the charger into an appropriate power outlet. The charger will
beep twice, the red light will blink and go off.

2. Insert the battery pack into the charger, as shown in FIG. 2, making
sure the pack is fully seated in the charger. The red light will blink
and the charger will beep once indicating the charging process has
started.

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DANGER:
WARNING:

FIG. 2

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when you turn out the lights. (3) Move charger and battery pack to a
location where the surrounding air temperature is approximately
65°F - 75°F (18°- 24°C). (4) If charging problems persist, take or
send the tool, battery pack and charger to your local service center.

4. The battery pack should be recharged when it fails to produce
sufficient power on jobs which were easily done previously. DO NOT
CONTINUE to use under these conditions. Follow the charging
procedure. You may also charge a partially used pack whenever you
desire with no adverse affect on the battery pack.

5. Under certain conditions, with the charger plugged into the power
supply, the exposed charging contacts inside the charger can be
shorted by foreign material. Foreign materials of a conductive nature
such as, but not limited to, steel wool, aluminum foil, or any buildup
of metallic particles should be kept away from charger cavities.
Always unplug the charger from the power supply when there is no
battery pack in the cavity. Unplug charger before attempting to clean.

6. Do not immerse charger in water or any other liquid.

WARNING: Don't allow any liquid to get inside charger. Electric

shock may result. To facilitate the cooling of the battery pack after
use, avoid placing the charger or battery pack in a warm environ­ment such as in a metal shed, or an uninsulated trailer.

CAUTION: Never attempt to open the battery pack for any reason.

If the plastic housing of the battery pack breaks or cracks, return to
a service center for recycling.

BATTERY PERFORMANCE

Some chargers have a tune-up feature optimizes battery pack
performance. Your charger may provide Automatic Tune-Up™ Mode
or manual (i.e. push button) Tune-Up™ mode. For information on this
feature, please see the appropriate section below. Because batteries
slowly lose their charge when they are not on the charger, the best
place to keep your battery pack is on the charger at all times.

Using Automatic Tune-Up™ Mode

The Automatic Tune-Up™ Mode equalizes or balances the individual
cells in the battery pack allowing it to function at peak capacity.

3. The battery pack will be fully charged in less than 15 minutes under
most conditions. This will be indicated by the red light remaining ON
and 3 beeps. The pack is fully charged and may be used at this time
or left in the charger.

WEAK BATTERY PACKS: The charger can also detect a weak
battery. Such batteries are still usable but should not be expected to
perform as much work. In such cases, about 10 seconds after battery
insertion, the charger will beep rapidly 8 times to indicate a weak
battery condition. The charger will then go on to charge the battery to
the highest capacity possible.

ALL CHARGERS
Leaving the battery pack in the charger: When the red light remains

ON, the charger has switched to its "equalize charge" mode which
lasts approximately 4 hours, after which the charger will switch to
"maintenance charge" mode. The battery pack can be removed at
any time during these charge cycles, but will only be fully charged if the
red light is continuously ON. The charger and battery pack can be left
connected with the red light glowing indefinitely. The charger will keep
the battery pack fresh and fully charged. A battery pack will slowly
lose its charge when kept out of the charger. If the battery pack has not
been kept on maintenance charge, it may need to be recharged before
use. A battery pack may also slowly lose its charge if left in a charger
that is not plugged into an appropriate AC source.

Important Charging Notes

1. Longest life and best performance can be obtained if the battery
pack is charged when the air temperature is between 65°F and 75°F
(18°- 24°C). DO NOT charge the battery pack in an air temperature
below +40°F(+4.5°C), or above +105°F (+40.5°C). This is important
and will prevent serious damage to the battery pack.

2. The charger and battery pack may become warm to touch while
charging. This is a normal condition, and does not indicate a
problem.

3. If the battery pack does not charge properly — (1) Check current at
receptacle by plugging in a lamp or other appliance, (2) Check to see
if receptacle is connected to a light switch which turns power off

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hours to complete. Battery packs should be tuned up weekly or after
10 to 20 charge/discharge cycles or whenever the pack no longer
delivers the same amount of work.

1. To tune up your battery pack, place the battery in the charger as
usual. The red light will blink continuously indicating that the
charge cycle has started.

2. Press the Tune-Up™ Mode button any time after the charge cycle
has started. The red light will stop blinking momentarily, blink
quickly 3 times, and then resume blinking continuously. The
charger is now tuning up the cells in your battery.

3. When the Tune-Up™ mode cycle is complete, the light will stay on
continuously. The pack is fully charged and may be used at this
time or left in the charger.

4. If you select Tune-Up™ Mode and then change your mind,
remove the battery from the charger. After 5 seconds, insert the
battery into the charger. The normal charge cycle will begin.

Side Handle (Fig. 3)

A side handle (A) is supplied with this hammer. It clamps to the front of
the gear case as shown and can be rotated 360˚ to permit right or left
hand use.

CAUTION: Always use the side handle supplied with the tool.

Keep a firm grip on the tool at all times. Do not attempt to operate this
tool without holding it with both hands. Operating this tool with one
hand will result in loss of control. Breaking through or encountering
hard materials such as re-bar may be be hazardous as well.

Variable Speed Switch (Fig. 3-B)

To turn the tool on, squeeze the trigger switch. To turn the tool off,
release the trigger switch. Your tool is equipped with a brake. The
chuck will stop as soon as the trigger switch is fully released.

The variable speed switch enables you to select the best speed for a
particular application. The farther you squeeze the trigger, the faster
the tool will operate. Use lower speeds for starting holes without a
center punch, drilling in metals or plastics, driving screws and drilling
ceramics. For maximum tool life, use variable speed only for starting
holes or fasteners.

Battery packs should be tuned up after every 10th charge/ discharge
cycle or whenever the pack no longer delivers the same amount of
work. To use the automatic tune-up mode, simply place the battery
pack in the charger and leave it for at least eight hours. The charger
will cycle through the following modes.

1. The red light will blink continuously indicating that the 1-hour
charge cycle has started.

2. When the 1-hour charge cycle is complete, the light will stay on
continuously and will no longer blink. This indicates that the pack
is fully charged and can be used at this time.

3. Whenever the pack is left in the charger after the initial 1-hour
charge, the charger will begin the Automatic Tune-Up™ Mode.
This mode continues up to 8 hours or until the individual cells in
the battery pack are equalized. The battery pack is ready for use
and can be removed at any time during the Tune-Up™ Mode.

4. Once the Automatic Tune-Up™ Mode is complete the charger
will transition to a maintenance charge; no indicator light shows
the completion of the Automatic Tune-Up™ Mode.

Using the Manual Tune-Up™ Mode

The manual Tune-up™ mode equalizes or balances the individual
cells in the battery pack at its peak capacity. This mode takes up to 8

FIG. 3

A

C

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Operation

DRILLING

1. Always unplug the drill when attaching or changing bits or
accessories.

2. Be sure the material to be drilled is anchored or clamped firmly. If
drilling thin material, use a wood “back-up” block to prevent damage
to the material.

3. Always apply pressure in a straight line with the bit. Use enough
pressure to keep drill biting, but do not push hard enough to stall the
motor or deflect the bit.

4. Hold tool firmly to control the twisting action of the drill.

5. IF DRILL STALLS, it is usually because it is being overloaded or
improperly used. 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.

6. To minimize stalling or breaking through the material, reduce
pressure on drill and ease the bit through the last fractional part of
the hole.

7. Keep the motor running when pulling the bit back out of a drilled
hole. This will help prevent jamming.

8. 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 shank to round shank’ adapter chuck is required. Ensure

that tool is in rotation 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. The cutting lubricants that work best are
sulphurized cutting oil or lard oil; bacon-grease will also serve the
purpose.

NOTE: Continuous use in variable speed range is not recommended.
It may damage the switch and should be avoided.

Forward/Reverse Control Button (3-C)

A forward/reverse control button determines the direction and also
serves as a lock off button. To select forward rotation, release the
trigger switch and depress the forward/reverse control button on the
right side of the tool.To select reverse, depress the forward/reverse
control button on the left side of the tool. 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:
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.

SDS Chuck (Fig. 3-D)

To insert bit,

insert shank of bit about 3/4” into chuck. Push and rotate

bit until it locks into place. The bit will be securely held.

To release bit,

pull the collar back and remove the bit.

Hammer/Drill Selector (Fig. 4)

To switch the tool from the drilling mode to the hammering mode (or
vice-versa) rotate the dial (A) to the applicable symbol shown. For
straight drilling, align the dial with the drill bit symbol (B) as shown. For
hammering, align the dial with the hammer symbol (C). NOTE: The
selector must be in either drill, or hammer/drill mode at all times. There
are no operable positions between the two.

FIG. 4

A

B

C

9

English

NOTE: Large (5/16” to 1/2”) holes in steel can be made easier if a pilot
hole (5/32” to 3/16”) is drilled first.

DRILLING IN WOOD
An ‘SDS shank to round shank’ adapter chuck is required. Ensure

that tool is in rotation 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.
Work that is apt to splinter should be backed up with a block of wood.

DRILLING IN MASONRY

When drilling in masonry, use carbide tipped bits rated for percussion
drilling and be certain that the bit has adequate carbide on the tip.
Ensure that the rotary hammer mode is selected. Use a constant and
firm force on the tool to drill most effectively. A smooth, even flow of
dust indicates the proper drilling rate.

Depth Rod

To adjust the depth rod, loosen the handle 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.

Maintenance

CLEANING & LUBRICATION

Use only mild soap and damp cloth to clean the tool. Never let any liquid
get inside the tool; never immerse any part of the tool into a liquid.

Self-lubricating bearings are used in the tool and periodic relubrication
is not required. If service is needed, take your tool to an authorized
service location.

Accessories

Recommended accessories for use with your tool are available for
purchase from your retailer or local service center.

CAUTION: The use of any non-recommended accessory may be

hazardous.

MAXIMUM RECOMMENDED CAPACITY - DW999

RPM 0 - 1,100
BPM 0 - 4900
BITS, METAL DRILLING 1/2”
BITS, FLAT BORING 1”
BITS, MASONRY 7/8” BIT - CONCRETE, BRICK, BLOCK

Repairs

To assure product SAFETY and RELIABILITY, repairs, maintenance
and adjustment (including brush inspection and replacement) should
be performed by authorized service centers or other qualified service
organizations, always using identical replacement parts.

Full Warranty

DEWALT heavy duty industrial tools are warranted for one year from
date of purchase. We will repair, without charge, any defects due to
faulty materials or workmanship. For warranty repair information, call
1-800-4-D

EWALT. This warranty does not apply to accessories or

damage caused where repairs have been made or attempted by
others. This warranty gives you specific legal rights and you may have
other rights which vary in certain states or provinces.

In addition to the warranty, D

EWALT tools are covered by our:

30 DAY NO RISK SATISFACTION GUARANTEE

If you are not completely satisfied with the performance of your
D

EWALT heavy duty industrial tool, simply return it to the participating

seller within 30 days for a full refund. Please return the complete unit,
transportation prepaid. Proof of purchase may be required.

FREE WARNING LABEL REPLACEMENT: If your warning labels
become illegible or are missing, call 1-800-4-DEWALT for a free
replacement.

SI VOUS AVEZ DES QUESTIONS OU VOULEZ NOUS FAIRE
PART DE VOS COMMENTAIRES CONCERNANT CET OUTIL OU
TOUT AUTRE OUTIL DeWALT, COMPOSEZ SANS FRAIS LE : 1
800 433-9258.

Règles générales de sécurité - Outils à
piles

AVERTISSEMENT! Lire et comprendre toutes les directives, car

le non-respect des directives suivantes peut entraîner un choc
électrique, un incendie ou des blessures graves.

CONSERVER CES DIRECTIVES

ZONE DE TRAVAIL

• Garder la zone de travail propre et bien éclairée; les établis

encombrés et les endroits sombres sont propices aux accidents.

• Ne pas utiliser les outils électriques dans une atmosphère

explosive, comme à proximité de liquides, de gaz ou de
poussières inflammables; le moteur peut créer des étincelles et

enflammer les vapeurs ou les poussières environnantes.

• Tenir les enfants, les visiteurs ou toute autre personne à
l’écart lorsqu’on utilise un outil électrique; les distractions
peuvent faire perdre la maîtrise de ce dernier.

MESURES DE SÉCURITÉ : ÉLECTRICITÉ

• Ne pas utiliser le cordon de manière abusive; on ne doit pas
transporter l’outil en le tenant par le cordon. On doit tenir le cordon
à l’écart des sources de chaleur, de l’huile, des bords tranchants
ou des pièces mobiles. Remplacer immédiatement les cordons
endommagés, car ces derniers augmentent les risques d’incendie.

• Un outil à piles intégrées ou à bloc-piles externe doit être
rechargé seulement au moyen du chargeur approprié, car un
chargeur destiné à une pile particulière peut entraîner un risque
d’incendie lorsqu’il est utilisé avec une autre.

• N’utiliser l’outil à piles qu’avec le bloc-piles désigné, car

l’utilisation d’un autre type de piles peut entraîner un risque
d’incendie.

SÉCURITÉ PERSONNELLE

• Rester vigilant en tout temps et faire preuve de jugement
lorsqu’on utilise un outil électrique; ne pas utiliser l’outil

lorsqu’on est fatigué ou sous l’influence de drogues, d’alcool ou
de médicaments, car un moment d’inattention peut entraîner des
blessures graves.

• Porter des vêtements appropriés; ne pas porter de vêtements
amples ni de bijoux. Couvrir ou attacher les cheveux longs. Garder
les cheveux, les vêtements, les bijoux et les gants éloignés des
pièces mobiles, car ceux-ci peuvent s’y coincer. Se tenir éloigné
des évents puisque ces derniers pourraient camoufler des pièces
mobiles.

• Éviter les démarrages accidentels; s’assurer que l’interrupteur
soit placé en position de verrouillage ou d’arrêt avant d’insérer le
bloc-piles. Ne pas transporter l’outil en laissant le doigt sur
l’interrupteur ni insérer le bloc-piles lorsque l’outil est en position de
marche, car cela pourrait causer un accident.

• Retirer les clés de réglage avant de démarrer l’outil; une clé
laissée sur une pièce rotative peut entraîner des blessures.

• Ne pas trop étendre les bras; les pieds doivent rester ancrés
fermement sur le sol afin de maintenir son équilibre en tout temps
et de mieux maîtriser l’outil dans des situations imprévues.

• Utiliser le matériel de sécurité approprié; toujours porter des
lunettes de protection. Porter un masque anti-poussières, des
chaussures antidérapantes, un casque de sécurité ou des
protecteurs auditifs lorsque la situation le requiert.

UTILISATION ET ENTRETIEN DE L’OUTIL

• Fixer et soutenir l’ouvrage sur une plate-forme stable au
moyen d’un étau ou de tout autre dispositif semblable;

l’ouvrage est instable lorsqu’on le retient manuellement ou qu’on
l’appuie contre le corps, ce qui peut faire perdre la maîtrise de

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