DeWalt DWE43840CN User manual

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1-800-4-DeWALT
Instruction Manual
Guide D’utilisation
Manual de instrucciones
DWE43840CN
Heavy-Duty Small Angle Trigger Switch Grinder
Meuleuse à faible inclinaison à gâchette pour service intensif
Esmeriladora de interruptor de gatillo de ángulo pequeño de
servicio pesado
final page size: 8.5 x 5.5 in

ENGLISH
English (original instructions) 1
Français (traduction de la notice d’instructions originale) 14
Español (traducido de las instrucciones originales) 29

ENGLISH
1
English (original instructions)
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.
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.
If you have any questions or comments about this or
any
DeWALT
tool, call us toll free at:
1-800-4-
DeWALT
(1-800-433-9258).
Fig. A
1 Spindle
2 Spindle lock button
3 Unthreaded backing flange
4 Threaded locking flange
5 Side handle
6 Guard
7 Guard latch
8 Trigger switch
9 Trigger lock off
10 LED Indicator
11 Pipeline Grip Gearcase Cover
8
1
4
3
5
6
7
9
210
11

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2
GENERAL POWER TOOL SAFETY WARNINGS
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.
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 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.
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.
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 the battery pack 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. 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

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3
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.
5) 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.
SAFETY INSTRUCTIONS FOR ALL
OPERATIONS
Safety Warnings Common for Grinding,
Sanding, Wire Brushing, 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 ) Do not use forpolishing.
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
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 or its own cord. 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 ) Position the cord clear of the spinning accessory.
If you lose control, the cord may be cut or snagged
and your hand or arm may be pulled into the
spinningaccessory.
l ) 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.
m ) 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.
n ) Regularly clean the power tool’s air vents. The
motor’s fan will draw the dust inside the housing and
excessive accumulation of powdered metal may cause
electricalhazards.
o ) Do not operate the power tool near flammable
materials. Sparks could ignite thesematerials.
p ) Do not use accessories that require liquid
coolants. Using water or other liquid coolants may
result in electrocution orshock.
q ) Do not use Type 11 (flaring cup) wheels on this
tool. Using inappropriate accessories can result
ininjury.
r ) Always use side handle. Tighten the handle
securely. The side handle should always be used to
maintain control of the tool at alltimes.
s ) 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.

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4
Never start the tool with a person in line with the
wheel. This includes theoperator.
t ) 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.
u ) Use clamps or another practical way to secure
and support the workpiece to a stable platform.
Holding the work by hand or against your body leaves
it unstable and may lead to 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.
y ) Air vents often cover moving parts and should be
avoided. Loose clothes, jewelry or long hair can be
caught in movingparts.
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.
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 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
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

ENGLISH
5
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.
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 ) If the use of a guard is recommended 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.
Additional Safety Information
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.
• Avoid prolonged contact with dust from power
sanding, sawing, grinding, drilling, and other
construction activities. 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.
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.
• 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. An undersized cord will cause a drop in line voltage
resulting in loss of power and overheating. When using
more than one extension to make up the total length,
be sure each individual extension contains at least the
minimum wire size. The following table shows the correct
size to use depending on cord length and nameplate
ampere rating. If in doubt, use the next heavier gauge. The
lower the gauge number, the heavier thecord.
Minimum Gauge for Cord Sets
Volts Total Length of Cord in Feet
(meters)
120 V 25 (7.6) 50 (15.2) 100 (30.5) 150 (45.7)
240 V 50 (15.2) 100 (30.5) 200 (61.0) 300 (91.4)
Ampere Rating
American Wire Gauge
More
Than
Not
More
Than
0 6 18 16 16 14
610 18 16 14 12
10 12 16 16 14 12
12 16 14 12 Not Recommended

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6
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
RPM....................revolutions per
minute
sfpm ...................surface feet per
minute
SPM....................strokes per minute
A.........................amperes
W........................watts
or AC........... alternating current
or AC/DC....alternating or
direct current
......................Class II
Construction
(double insulated)
no.......................no load speed
n.........................rated speed
......................earthing terminal
.....................safety alert symbol
.....................visible radiation
.....................wear respiratory
protection
.....................wear eye
protection
.....................wear hearing
protection
.....................read all
documentation
Lanyard Connection (Fig. B)
Safety Warnings Specific for Use At Height
WARNING: If the tool is dropped for any reason the
lanyard connection must be inspected and properly
serviced prior to re-use. The lanyard connection is
designed to stretch to absorb the shock of a drop.
Any permanent stretch to the connection exposing
the red marked internal coils indicates it has been
compromised and must be serviced prior toreuse.
• Always keep the tool and accessories tethered when
working "at height". [Maximum lanyard length: 6 ft (2m)]
• Use only with lanyards appropriate for this tool type and
rated for at least 15 lbs (6.8Kg).
• Crush, cut or entanglement hazard. Do not use near
moving parts, mechanisms or runningmachinery.
• Do not anchor the tool lanyard to anything on your body.
Anchor to a rigid structure that can withstand the forces
of a droppedtool.
• Make sure the lanyard is properly secure at each end prior
touse.
• Inspect tool and lanyard before each use for damage and
proper function (including fabric and stitching). Do not
use if damaged or not functioningproperly.
• Do not alter the lanyard connection or use in a manner
other than as instructed in thismanual.
• Only attach tool to a lanyard with a locking carabiner. Do
not attach by looping or knotting the lanyard. Do not use
rope orcord.
• Electrical shock hazard. Be sure power is off when working
in high voltage areas. Some lanyards areconductive.
• Dropped tools will swing on the lanyard, which could
cause injury or loss ofbalance.
• Do not carry the tool by attachment device or thelanyard.
• Do not attach more than one tool to eachlanyard.
• Only use appropriate
DeWALT
brand attachment point.
NEVER modify tools to create attachmentpoints.
• Only transfer the tool between hands while properly
balanced in a stableorientation.
• Do not attach lanyards to tool in a way that keeps guards,
switches or lock-offs from operatingproperly.
• Avoid getting tangled in thelanyard.
• Keep lanyard away from the cutting area of thetool.
• Do not use lanyards or attachment devices to get
additional leverage from thetool.
• Do not use for personal fallprotection.
• Falling object hazard! Only change accesories and
attachments where a dropped object won't cause a
hazard below you. Consult your AHJ or site supervisor for
procedures for working atheight.
• Use multi-action and screw gate type carabineers. Do not
use single action spring clipcarabineers.
The lanyard connection 12 is intended for use by
competent personnel, who are trained and knowledgeable
regarding working with tools in and around machinery and
"at height".A lanyard connection may be added to certain
models by an authorized servicecenter.
12
Fig. B
SAVE THESE INSTRUCTIONS FOR
FUTURE USE
Motor
Be sure your power supply agrees with the nameplate
marking. Voltage decrease of more than 10% will cause loss
of power and overheating.
DeWALT
tools are factory tested;
if this tool does not operate, check powersupply.
COMPONENTS (FIG. A)
WARNING: Never modify the power tool or any part
of it. Damage or personal injury couldresult.
Refer to Figure A at the beginning of this manual for a
complete list ofcomponents.
Intended Use
Your heavy-duty small 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.
Your heavy-duty small angle grinders is a professional
power tool. DO NOT let children come into contact with the
tool. Supervision is required when inexperienced operators
use thistool.

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7
Features
E-switch Protection™
The ON/OFFswitch has a no-volt release function. In the
event of a power outage or other unexpected shut down,
the switch will need to be cycled (turned off and then on)
to restarttool.
E-Clutch™
This unit is equipped with an E-Clutch™ (Electronic Clutch),
which in the event of a high-load or wheel pinch, the unit
will be shut off to reduce the reaction torque to the user.
The switch needs to be cycled (turned off and then on) to
restarttool.
Gear Case Grip
The gear case grip is a soft grip cover for the gear case that
can be used as a gripping surface only for pipeline grinding
and wire brushing where the edge of the wheel is used
for grinding and cleaning and precise control is needed to
ensure accuracy. As with any gripping surface, maintain
firm grip during use. The side handle should be used as the
secondary grip surface for all otherapplications.
Brake
When the trigger switch is released the motor immediately
turns off and electronically brakes stopping the
accessoryquickly.
Kickback Brake™
When a severe pinch, stall, or bind-up event is sensed the
electronic brake engages with maximum force to quickly
stop the wheel, reduce the movement of the grinder, and
shut the grinder off. Turn the unit on to restarttool.
Constant Clutch™
When overloaded or stalled the motor torque is reduced. If
load is reduced the torque and RPM will increase. If the tool
is stalled for an extended amount of time it will shut-off and
require the switch to cycle torestart.
LED Indicator (Fig. A)
The LED indicator 10 will remain lit green during normal
activity, or blink in a pattern of red light to alert you a
tool protection feature has been activated. Refer to the
LED Guide at the back of this manual for explanations of
blinkpatterns.
ASSEMBLY AND ADJUSTMENTS
WARNING: To reduce the risk of serious personal
injury, turn unit off and disconnect it from
power source before making any adjustments or
removing/installing attachments or accessories.
An accidental start-up can causeinjury.
Accessories
The capacity of the DWE43840CN is 7" (180 mm) diameter x
1/4” (6.35 mm) thick grinding wheels.
It is important to choose the correct guards, backing pads
and flanges to use with grinder accessories. See page13 for
information on choosing the correct accessories.
WARNING: Handle and store all abrasive wheels
carefully to prevent damage from thermal shock, heat,
mechanical damage, etc. Store in a dry protected area
free from high humidity, freezing temperatures or
extreme temperature changes.
Attaching Side Handle (Fig. A)
WARNING: Before using the tool, check that the
handle is tightenedsecurely.
Screw the side handle5 tightly into one of the holes on
either side of the gear case. The side handle should always
be used to maintain control of the tool at alltimes.
Guards
CAUTION: Guards must be used with all grinding
wheels, cutting wheels, sanding flap discs,
wire brushes, and wire wheels. The tool may
be used without a guard only when sanding with
conventional sanding discs. Refer to Figure A to see
guards provided with the unit. Some applications may
require purchasing the correct guard from your local
dealer or authorized servicecenter.
NOTE: Edge grinding and cutting can be performed with
Type 27 wheels designed and specified for this purpose;
1/4" (6.35 mm) thick wheels are designed for surface
grinding while thinner Type 27 wheels need to be examined
for the manufacturer's label to see if they can be used for
surface grinding or only edge grinding/cutting. A Type 1
guard must be used for any wheel where surface grinding
is forbidden. Cutting can also be performed by using a
Type41 wheel and a Type 1guard.
NOTE: See the Accessories Chart to select the proper guard
/ accessorycombination.
Mounting and Removing Guard (Fig. C, D)
CAUTION: Guards must be used with all grinding
wheels, cut-off wheels, diamond coated wheels,
sanding flap discs, wire brushes, and wire wheels.
The tool may be used without a guard only when
sanding with conventional sanding discs. Some
DeWALT
models are provided with a guard intended
for use with depressed center wheels (Type 27) and
hubbed grinding wheels (Type 27). The same guard
is designed for use with sanding flap discs (Type 27
and 29) and wire brushes. Grinding and cutting with
wheels other than Type 27 and 29 require different
accessory guards not included with tool. Mounting
instructions for these accessory guards are included in
the accessorypackage.
1. Open the guard latch 7. Align the lugs 14 on the
guard with the slots 15 on the gearcase.

ENGLISH
8
Fig. C
7
14
15
6
2. Push the guard down until the guard lugs engage and
rotate freely in the groove on the gear casehub.
3. With the guard latch open, rotate the guard 6 into the
desired working position. The guard body should be
positioned between the spindle and the operator to
provide maximum operatorprotection.
4. Close the guard latch to secure the guard on the
gear case. You should not be able to rotate the guard
by hand when the latch is closed. Do not operate
the grinder with a loose guard or the clamp lever in
openposition.
5. To remove the guard, open the guard latch, rotate the
guard so that the arrows are aligned and pull up on
theguard.
NOTE: The guard is pre-adjusted to the diameter of the gear
case hub at the factory. If, after a period of time, the guard
becomes loose, tighten the adjusting screw 13 with clamp
lever in the closedposition.
Fig. D
13
CAUTION: Do not tighten the adjusting screw with
the clamp lever in open position. Undetectable
damage to the guard or the mounting hub mayresult.
CAUTION: If guard cannot be tightened by adjusting
clamp, do not use tool and take the tool and guard to
a service center to repair or replace theguard.
Flanges and Wheels
CAUTION: Turn unit off and unplug the tool before
making any adjustments or removing or installing
attachments oraccessories.
Mounting Non-Hubbed Wheels (Fig. E)
WARNING: Failure to properly seat the flanges and/or
wheel could result in serious injury (or damage to the
tool orwheel).
CAUTION: Included flanges must be used with
depressed center Type 27/42 grinding wheels and
Type1/41 cutting wheels. Refer to the Accessories
Chart for moreinformation.
WARNING: A closed, two-sided cutting wheel guard
is required when using abrasive cutting wheels or
diamond coated cutting wheels.
WARNING: Use of a damaged flange or guard or fail-
ure to use proper flange and guard can result in injury
due to wheel breakage and wheel contact. Refer to the
Accessories Chart for moreinformation.
1. Place the tool on a table, guardup.
2. Place wheel17 against the backing flange 3 ,
centering the wheel on the raised center (pilot) of the
backingflange.
3. While depressing the spindle lock button and with the
hex depressions facing away from the wheel, thread the
threaded locking flange4 on spindle so that the lugs
engage the two slots in thespindle.
4. While depressing the spindle lock button, tighten the
threaded locking flange4 using a Hexwrench.
5. To remove the wheel, depress the spindle lock button
and loosen the threaded lockingflange.
Fig. E
4
17
3
1
Mounting Sanding Backing Pads (Fig. A, F)
NOTE: Use of a guard with sanding discs that use backing
pads, often called fiber resin discs, is not required. Since a
guard is not required for these accessories, the guard may or
may not fit correctly ifused.
WARNING: Failure to properly seat the clamp nut
and/or pad could result in serious injury (or damage
to the tool orwheel).
WARNING: Proper guard must be reinstalled for
grinding wheel, cutting wheel, sanding flap disc,
wire brush or wire wheel applications after sanding
applications arecomplete.
1. Place or appropriately thread backing pad 16 on
thespindle.
2. Place the sanding disc18 on the backing pad16.
3. While depressing spindle lock button2, thread the
sanding clamp nut19 on spindle, piloting the raised
hub on the clamp nut into the center of sanding disc
and backingpad.
4. Tighten the clamp nut by hand. Then depress the
spindle lock button while turning the sanding disc until
the sanding disc and clamp nut aresnug.
5. To remove the wheel, grasp and turn the backing
pad and sanding pad while depressing the spindle
lockbutton.