DeWalt DCG440X2 User manual

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1‑800‑4‑DeWALT
DCG440
60V Max* Cordless Grinder with Kickback BrakeTM
Meuleuse sans fil avec Kickback BrakeMC, 60V max
Esmeriladora Inalámbrica de 60V Máx* con Kickback BrakeTM
Instruction Manual
Guide D’utilisation
Manual de instrucciones

English (original instructions) 4
Français (traduction de la notice d’instructions originale) 18
Español (traducido de las instrucciones originales) 35

1
Fig. A DCG440
Components
1 Trigger switch
2 Lock‑off lever
3 Spindle lock button
4 Spindle
5 Auxiliary handle
6 Grinding wheel
7 Unthreaded backing flange
(fixed to spindle)
8 Locking flange
9 Type 27Guard 7"(180mm)
10 Guard release lever
11 Battery pack
12 Battery release button
13 Main Handle
1
2
Componentes
1 Interruptor de gatillo
2 Palanca de bloqueo de apagado
3 Botón de bloqueo de husillo
4 Husillo
5 Manija auxiliar
6 Rueda esmeriladora
7 Brida de respaldo no roscada
(fija a husillo)
8 Brida de bloqueo
9 Protección Tipo 27de 180mm(7")
10 Palanca de liberación de protección
11 Paquete de batería
12 Botón de liberación de batería
13 Manija principal
Composants
1 Gâchette
2 Levier de verrouillage
3 Bouton de verrouillage de la tige
4 Tige
5 Poignée auxiliaire
6 Disque de meulage
7 Bride d’épaulement non filetée
(fixée à la tige)
8 Bride de verrouillage
9 Protection de type 27 7 po
(180mm)
10 Levier de libération de la protection
11 Bloc‑piles
12 Bouton de libération du bloc‑piles
13 Poignée principale
45
9
12
3
10
7
8
13
11
6

2
Fig.B Fig.C
Fig.D Fig.E
Fig.F
5
90˚ 90˚
14
15
8
6
7
4
Fig.G
10
9
16
24
25
6
7
24
Fig.H
4
75–100% charged
Chargé de 75 à 100 %
75–100% cargada
51–74% charged
Chargé de 51 à 74 %
51–74% cargada
< 50% charged
Chargé de < 50 %
< 50% cargada
Pack needs to be charged
Le bloc‑piles doit être rechargé
La batería tiene que cargarse
Indicators/Témoin/Indicador
Charging
Bloc‑piles en Cours
de Chargement
Unidad en Proceso de Carga
Fully Charged
Bloc‑piles Chargé
Unidad Cargada
Hot/Cold Pack Delay
Suspension de Charge Contre
le Chaud/Froid
Restraso por Unidad Caliente/
Fría

3
Fig.I Fig.J
Fig.K Fig.L
Fig.M
23
18
19
3
4
11
12
5
20
21 22
13
Fig.N
Fig.O

ENGLISH
4
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, 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.
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.
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.
Intended Use
This heavy‑duty medium angle grinder has been designed
for professional grinding, sanding, wire brush, and cut‑off
applications at various work sites (i.e., constructionsites).
DO NOT use under wet conditions or in presence of
flammable liquids orgases.
These heavy‑duty small angle grinders are professional
power tools. DO NOT let children come into contact with the
tool. Supervision is required when inexperienced operators
use thistool.
WARNING: Read all safety warnings and all
instructions. Failure to follow the warnings and
instructions may result in electric shock, fire and/or
seriousinjury.
WARNING: To reduce the risk of injury, read the
instructionmanual.
English (original instructions)

5
ENGLISH
SAFETY INSTRUCTIONS FOR ALL
OPERATIONS
Safety Warnings Common for Grinding,
Sanding, Wire Brushing, or Abrasive
Cutting‑Off Operations
a ) This power tool is intended to function as a
grinder, sander, wire brush, or cut‑off tool. 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.
b ) Operations such as polishing are not
recommended to be performed with this
power tool. Operations for which the power tool
was not designed may create a hazard and cause
personalinjury.
c ) Do not use accessories which are not specifically
designed and recommended by the tool
manufacturer. Just because the accessory can
be attached to your power tool, it does not assure
safeoperation.
d ) The rated speed of the accessory must be at least
equal to the maximum speed marked on the
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.
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 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,

ENGLISH
6
excessive accumulation of powdered metal may cause
electricalhazards.
n ) Do not operate the power tool near flammable
materials. Sparks could ignite thesematerials.
o ) Do not use accessories that require liquid
coolants. Using water or other liquid coolants may
result in electrocution orshock.
p ) Do not use Type 11(flaring cup) wheels on this
tool. Using inappropriate accessories can result
ininjury.
q ) Always use auxiliary handle. Tighten the handle
securely. The auxiliary handle should always be used
to maintain control of the tool at alltimes.
r ) When starting the tool with a new or replacement
wheel, or a new or replacement wire brush
installed, hold the tool in a well protected area
and let it run for one minute. If the wheel has
an undetected crack or flaw, it should burst in
less than one minute. If the wire brush has loose
wires, they will be detected. Never start the tool
with a person in line with the wheel. This includes
theoperator.
s ) Use of accessories not specified in this manual
is not recommended and may be hazardous.
Use of power boosters that would cause the tool
to be driven at speeds greater than its rated speed
constitutesmisuse.
t ) To prevent the spindle end from contacting the
bottom of the hole of the hubbed wheel, use
accessories that have a threaded hole depth of
at least 21mm. Failure to use an accessory with the
appropriate thread depth could result in damage to the
hubbed wheel and injury to the operator or persons in
thearea.
u ) The arbor size of hubbed wheels, flanges, backing
pads or any other accessory must properly fit the
spindle of the power tool. Accessories with arbor
holes that do not match the mounting hardware of the
power tool will run out of balance, vibrate excessively
and may cause loss ofcontrol.
v ) Avoid bouncing the wheel or giving it rough
treatment. If this occurs, stop the tool and inspect the
wheel for cracks orflaws.
w ) Always handle and store wheels in a carefulmanner.
x ) 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.
Kickback and Related Warnings
Kickback is a sudden reaction to a pinched or snagged rotating
wheel, backing pad, brush or any other accessory. Pinching or
snagging causes rapid stalling of the rotating accessory which
in turn causes the uncontrolled power tool to be forced in the
direction opposite of the accessory’s rotation at the point of
thebinding.
power tool. Accessories running faster than their rated
speed can break and flyapart.
e ) The outside diameter and the thickness of your
accessory must be within the capacity rating of
your power tool. Incorrectly sized accessories cannot
be adequately guarded orcontrolled.
f ) Threaded mounting of accessories must match
the grinder spindle thread. For accessories
mounted by flanges, the arbor hole of the
accessory must fit the locating diameter of the
flange. Accessories that do not match the mounting
hardware of the power tool will run out of balance,
vibrate excessively and may cause loss ofcontrol.
g ) Do not use a damaged accessory. Before each use
inspect the accessory such as abrasive wheels for
chips and cracks, backing pad for cracks, tear or
excess wear, wire brush for loose or cracked wires.
If power tool or accessory is dropped, inspect for
damage or install an undamaged accessory. After
inspecting and installing an accessory, position
yourself and bystanders away from the plane of
the rotating accessory and run the power tool
at maximum no‑load speed for one minute.
Damaged accessories will normally break apart during
this testtime.
h ) Wear personal protective equipment. Depending
on application, use face shield, safety goggles or
safety glasses. As appropriate, wear dust mask,
hearing protectors, gloves and workshop apron
capable of stopping small abrasive or workpiece
fragments. The eye protection must be capable
of stopping flying debris generated by various
operations. The dust mask or respirator must be
capable of filtrating particles generated by your
operation. Prolonged exposure to high intensity noise
may cause hearingloss.
i ) Keep bystanders a safe distance away from work
area. Anyone entering the work area must wear
personal protective equipment. Fragments of
workpiece or of a broken accessory may fly away and
cause injury beyond immediate area ofoperation.
j ) Hold the power tool by insulated gripping
surfaces only, when performing an operation
where the cutting accessory 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.
k ) Never lay the power tool down until the accessory
has come to a complete stop. The spinning accessory
may grab the surface and pull the power tool out of
yourcontrol.
l ) Do not run the power tool while carrying it at your
side. Accidental contact with the spinning accessory
could snag your clothing, pulling the accessory into
yourbody.
m ) Regularly clean the power tool’s air vents. The
motor’s fan will draw the dust inside the housing and

7
ENGLISH
wheel. Proper wheel flanges support the wheel
thus reducing the possibility of wheel breakage.
Flanges for cut‑off wheels may be different from
grinding wheelflanges.
f ) Do not use worn down wheels from larger power
tools. Wheel intended for larger power tool is not
suitable for the higher speed of a smaller tool and
mayburst.
Additional Safety Warnings Specific for
Abrasive Cutting‑Off Operations
a ) Do not “jam” the cut‑off wheel or apply excessive
pressure. Do not attempt to make an excessive
depth of cut. Overstressing the wheel increases the
loading and susceptibility to twisting or binding of
the wheel in the cut and the possibility of kickback or
wheelbreakage.
b ) Do not position your body in line with and behind
the rotating wheel. When the wheel, at the point of
operation, is moving away from your body, the possible
kickback may propel the spinning wheel and the power
tool directly atyou.
c ) When wheel is binding or when interrupting a cut
for any reason, switch off the power tool and hold
the power tool motionless until the wheel comes
to a complete stop. Never attempt to remove the
cut‑off wheel from the cut while the wheel is in
motion otherwise kickback may occur. Investigate
and take corrective action to eliminate the cause of
wheelbinding.
d ) Do not restart the cutting operation in the
workpiece. Let the wheel reach full speed and
carefully reenter the cut. The wheel may bind,
walk up or kickback if the power tool is restarted in
theworkpiece.
e ) Support panels or any oversized workpiece to
minimize the risk of wheel pinching and kickback.
Large workpieces tend to sag under their own
weight. Supports must be placed under the workpiece
near the line of cut and near the edge of the workpiece
on both sides of thewheel.
f ) Use extra caution when making a “pocket cut”
into existing walls or other blind areas. The
protruding wheel may cut gas or water pipes, electrical
wiring or objects that can causekickback.
Safety Warnings Specific for
SandingOperations
a ) Do not use excessively oversized sanding disc
paper. Follow manufacturers recommendations,
when selecting sanding paper. Larger sanding
paper extending beyond the sanding pad presents a
laceration hazard and may cause snagging, tearing of
the disc orkickback.
For example, if an abrasive wheel is snagged or pinched by the
workpiece, the edge of the wheel that is entering into the pinch
point can dig into the surface of the material causing the wheel
to climb out or kick out. The wheel may either jump toward or
away from the operator, depending on direction of the wheel’s
movement at the point of pinching. Abrasive wheels may also
break under theseconditions.
Kickback is the result of tool misuse and/or incorrect operating
procedures or conditions and can be avoided by taking proper
precautions as given below:
a ) Maintain a firm grip on the power tool and
position your body and arm to allow you to resist
kickback forces. Always use auxiliary handle, if
provided, for maximum control over kickback or
torque reaction during start up. The operator can
control torque reaction or kickback forces, if proper
precautions aretaken.
b ) Never place your hand near the rotating
accessory. Accessory may kickback over yourhand.
c ) Do not position your body in the area where
power tool will move if kickback occurs. Kickback
will propel the tool in direction opposite to the wheel’s
movement at the point ofsnagging.
d ) Use special care when working corners, sharp
edges etc. Avoid bouncing and snagging the
accessory. Corners, sharp edges or bouncing have a
tendency to snag the rotating accessory and cause loss
of control orkickback.
e ) Do not attach a saw chain woodcarving blade
or toothed saw blade. Such blades create frequent
kickback and loss ofcontrol.
Safety Warnings Specific for Grinding and
Abrasive Cutting‑Off Operations
a ) Use only wheel types that are recommended for
your power tool and the specific guard designed
for the selected wheel. Wheels for which the power
tool was not designed cannot be adequately guarded
and areunsafe.
b ) The grinding surface of center depressed wheels
must not be mounted below the plane of the
guard lip. An improperly mounted wheel that
projects through the plane of the guard lip cannot be
adequatelyprotected.
c ) The guard must be securely attached to the power
tool and positioned for maximum safety, so the
least amount of wheel is exposed towards the
operator. The guard helps to protect the operator from
broken wheel fragments, accidental contact with wheel
and sparks that could igniteclothing.
d ) Wheels must be used only for recommended
applications. For example: do not grind with the
side of cut‑off wheel. Abrasive cut‑off wheels are
intended for peripheral grinding, side forces applied to
these wheels may cause them toshatter.
e ) Always use undamaged wheel flanges that
are of correct size and shape for your selected

ENGLISH
8
BATTERIES AND CHARGERS
The battery pack is not fully charged out of the carton.
Before using the battery pack and charger, read the
safety instructions below and then follow charging
proceduresoutlined. When ordering replacement battery
packs, be sure to include the catalog number andvoltage.
The label on your tool may include the following symbols. The
symbols and their definitions are asfollows:
V.........................volts
Hz .......................hertz
min.....................minutes
or DC......direct current
......................Class I Construction
(grounded)
…/min..............per minute
BPM....................beats per minute
IPM.....................impacts per minute
OPM....................oscillations per
minute
RPM....................revolutions per
minute
sfpm ...................surface feet per
minute
SPM....................strokes per minute
A.........................amperes
W........................watts
Wh...................... watt hours
Ah.......................amp hours
or AC........... alternating current
or AC/DC....alternating or direct
current
......................Class II Construction
(double insulated)
no.......................no load speed
n.........................rated speed
PSI.......................pounds per square
inch
......................earthing terminal
.....................safety alert symbol
.....................visible radiation
.....................wear respiratory
protection
.....................wear eye protection
.....................wear hearing
protection
.....................read all
documentation
• 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 will stand upright on the battery pack
but may be easily knockedover.
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.
WARNING: Use of this tool can generate and/or
disperse dust, which may cause serious and permanent
respiratory or other injury. Always use NIOSH/OSHA
approved respiratory protection appropriate for
the dust exposure. Direct particles away from face
andbody.
WARNING: Always wear proper personal hearing
protection that conforms to ANSI S12.6 (S3.19)
during use. Under some conditions and duration
of use, noise from this product may contribute to
hearingloss.
• 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.
Safety Warnings Specific for Wire
BrushingOperations
a ) Be aware that wire bristles are thrown by the
brush even during ordinary operation. Do not
overstress the wires by applying excessive load to
the brush. The wire bristles can easily penetrate light
clothing and/orskin.
b ) Guard must be used for wire brushing, do not
allow any interference of the wire wheel or brush
with the guard. Wire wheel or brush may expand in
diameter due to work and centrifugalforces.
c ) Safety goggles or safety glasses with side shields
and a full face shield compliant with ANSI Z87.1
MUST be worn by the operator and others that are
within 50' (15.2 m) of the use of thisproduct.