DeWalt DWE4357 User manual

DWE4347
DWE4357
DWE4369
Final Page size: A5 (148mm x 210mm)

B
Copyright
DeWALT
English (original instructions) 3

1
Fig. A
Fig. B Fig. C
3
1
9
12
20
7
6
4 5
DWE4357, DWE4369
10 8
9
2

2
Fig. F
Fig. D Fig. E
19
18
17
9
14
11
13
15
3
5
16
4
2
Fig. G

ENGLISH
3
CAUTION: Working with the wire brush or the abrasive
cutting can lead to different vibration levels!
EC-Declaration of Conformity
Machinery Directive
Small Angle Grinders
DWE4347, DWE4357, DWE4369
DeWALT
declares that these products described under
Technical Data are in compliance with:
2006/42/EC, EN60745-1:2009+A11:2010, EN60745-2-
3:2011+A2:2013+A11:2014 +A12:2014+A13:2015.
These products also comply with Directive 2014/30/EU and
2011/65/EU. For more information, please contact
DeWALT
at
the following address or refer to the back of themanual.
The undersigned is responsible for compilation of the technical
file and makes this declaration on behalf of
DeWALT
.
The vibration emission level given in this information sheet has
been measured in accordance with a standardised test given in
EN60745 and may be used to compare one tool with another. It
may be used for a preliminary assessment ofexposure.
WARNING: The declared vibration emission level
represents the main applications of the tool. However if
the tool is used for different applications, with different
accessories or poorly maintained, the vibration emission
may differ. This may significantly increase the exposure
level over the total workingperiod.
An estimation of the level of exposure to vibration should
also take into account the times when the tool is switched
off or when it is running but not actually doing the job.
This may significantly reduce the exposure level over the
total workingperiod.
Identify additional safety measures to protect the operator
from the effects of vibration such as: maintain the tool
and the accessories, keep the hands warm, organisation
of workpatterns.
English (original instructions)
SMALL ANGLE GRINDERS
DWE4347, DWE4357, DWE4369
Congratulations!
You have chosen a
DeWALT
tool. Years of experience, thorough product development and innovation make
DeWALT
one of the
most reliable partners for professional power toolusers.
Technical Data
DWE4347 DWE4357 DWE4369
Voltage VAC 230 230 230
Type 111
Power input W
1700 1700 1700
No-load speed min-1 10500 2200–10500 1800–8000
Rated speed min-1 10500 10500 8000
Wheel diameter mm
125 125 125
Wheel thickness (max) mm 6.0 6.0 6.0
Spindle diameter M14 M14 M14
Spindle length mm 18.5 18.5 18.5
Weight kg 2.39 2.41 2.53
* weight includes side handle and guard
Noise and vibration total values (triax vector sum) according to EN60745-2-3:
LPA (emission sound pressure level) dB(A) 89 89 88
LWA (sound power level) dB(A) 100 100 99
K (uncertainty for the given sound level) dB(A) 333
Surface grinding
Vibration emission value a
h,AG
= m/s² 5.8 5.8 4.1
Uncertainty K = m/s² 1.5 1.5 1.5
Disc sanding
Vibration emission value a
h,DS
= m/s² 2.5 2.5 3.3
Uncertainty K = m/s² 1.5 1.5 1.5

4
ENGLISH
Vice President of Engineering, PTE-Europe
Director Engineering
DeWALT
, Richard-Klinger-Straße 11,
D-65510, Idstein, Germany
15.09.2020
WARNING: To reduce the risk of injury, read the
instructionmanual.
Definitions: Safety Guidelines
The definitions below describe the level of severity for each
signal word. Please read the manual and pay attention to
thesesymbols.
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.
NOTICE: Indicates a practice not related to
personal injury which, if not avoided, may result in
propertydamage.
Denotes risk of electricshock.
Denotes risk offire.
General Power Tool Safety Warnings
WARNING: Read all safety warnings, instructions,
illustrations and specifications provided with this
power tool. Failure to follow all instructions listed below
may result in electric shock, fire and/or seriousinjury.
SAVE ALL WARNINGS AND
INSTRUCTIONS
FOR FUTUREREFERENCE.
The term “power tool” in the warnings refers to your mains-
operated (corded) power tool or battery-operated (cordless)
powertool.
1) Work Area Safety
a ) Keep work area clean and well lit. Cluttered or dark
areas inviteaccidents.
b ) Do not operate power tools in explosive
atmospheres, such as in the presence of flammable
liquids, gases or dust. Power tools create sparks which
may ignite the dust orfumes.
c ) Keep children and bystanders away while operating
a power tool. Distractions can cause you to losecontrol.
2) Electrical Safety
a ) Power tool plugs must match the outlet. Never
modify the plug in any way. Do not use any adapter
plugs with earthed (grounded) power tools.
Unmodified plugs and matching outlets will reduce risk of
electricshock.
b ) Avoid body contact with earthed or grounded
surfaces such as pipes, radiators, ranges and
refrigerators. There is an increased risk of electric shock if
your body is earthed orgrounded.
c ) Do not expose power tools to rain or wet conditions.
Water entering a power tool will increase the risk of
electricshock.
d ) Do not abuse the cord. Never use the cord for
carrying, pulling or unplugging the power tool. Keep
cord away from heat, oil, sharp edges or moving
parts. Damaged or entangled cords increase the risk of
electricshock.
e ) When operating a power tool outdoors, use an
extension cord suitable for outdoor use. Use of a cord
suitable for outdoor use reduces the risk of electricshock.
f ) If operating a power tool in a damp location is
unavoidable, use a residual current device (RCD)
protected supply. Use of an RCD 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 energising 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
jewellery. Keep your hair and clothing away from
moving parts. Loose clothes, jewellery 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.

5
ENGLISH
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) 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.
ADDITIONAL SPECIFIC SAFETY RULES
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, 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 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 can not be
adequately guarded orcontrolled.
f ) Threaded mounting of accessories must match the
grinder spindle thread. For accessories mounted by
flanges, the arbour 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 wheel 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 electricalshock.

6
ENGLISH
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.
FURTHER SAFETY INSTRUCTIONS FOR ALL
OPERATIONS
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
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 centre 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
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
operations, 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.

7
ENGLISH
d ) Do not restart the cutting operation in the
workpiece. Let the wheel reach full speed and
carefully re-enter 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.
Additional Safety Instructions for Sanding
Operations
a ) Do not use excessively oversized sanding disc
paper. Follow manufacturer’s 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.
Additional Safety Instructions 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 llight 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.
Additional Safety Rules for Grinders
a ) Do not use Type 11 (flaring cup) wheels on this tool.
Using inappropriate accessories can result ininjury.
b ) Always use side handle. Tighten the handle securely.
The side handle should always be used to maintain control
of the tool at alltimes.
Residual Risks
In spite of the application of the relevant safety regulations
and the implementation of safety devices, certain residual risks
cannot be avoided. These are:
• Impairment ofhearing.
• Risk of personal injury due to flyingparticles.
• Risk of burns due to accessories becoming hot
duringoperation.
• Risk of personal injury due to prolongeduse.
• Risk of dust from hazardoussubstances.
Electrical Safety
The electric motor has been designed for one voltage only.
Always check that the power supply corresponds to the voltage
on the ratingplate.
Your
DeWALT
tool is double insulated in accordance
with EN60745; therefore no earth wire isrequired.
If the supply cord is damaged, it must be replaced only by
DeWALT
or an authorised serviceorganisation.
WARNING: We recommend the use of a residual current
device with a residual current rating of 30mA orless.
Using an Extension Cable
If an extension cable is required, use an approved 3–core
extension cable suitable for the power input of this tool (see
Technical Data). The minimum conductor size is 1.5 mm2; the
maximum length is30m.
When using a cable reel, always unwind the cablecompletely.
Package Contents
The package contains:
1 Angle grinder
1 Guard
1 Side handle
1 Backing flange
1 Keyless clamp nut
1 Hex key
1 Instruction manual
• Check for damage to the tool, parts or accessories which may
have occurred duringtransport.
• Take the time to thoroughly read and understand this manual
prior tooperation.
Markings on Tool
The following pictograms are shown on the tool:
Read instruction manual beforeuse.
Wear earprotection.
Wear eyeprotection.
Electronic Brake
Date Code Position (Fig. D)
The date code11, which also includes the year of manufacture,
is printed into thehousing.
Example:
2020 XX XX
Year of Manufacture

8
ENGLISH
Description (Fig.A,B)
WARNING: Never modify the power tool or any part of it.
Damage or personal injury couldresult.
1 Spindle lock button
2 Spindle
3 Side handle
4 Backing flange
5 Clamp nut
6 Guard
7 Slider switch
8 Variable speed dial (DWE4357, DWE4369)
9 Guard release lever
10 LED Indicator
Intended Use
Your heavy-duty small angle grinder has been designed
for professional grinding, sanding, wire brushing and
cuttingapplications.
DO NOT use grinding wheels other than centre depressed
wheels and flapdiscs.
DO NOT use under wet conditions or in the presence of
flammable liquids orgases.
Your heavy-duty angle grinder is a professional powertool.
DO NOT let children come into contact with the tool.
Supervision is required when inexperienced operators use
thistool.
• Young children and the infirm. This appliance is not
intended for use by young children or infirm persons
without supervision.
• This product is not intended for use by persons (including
children) suffering from diminished physical, sensory or
mental abilities; lack of experience, knowledge or skills
unless they are supervised by a person responsible for their
safety. Children should never be left alone with thisproduct.
Features
Anti-vibration Side Handle
DWE4369
The anti-vibration side handle offers added comfort by
absorbing the vibrations caused by thetool.
No-Volt
The No-volt function stops the grinder restarting without the
switch being cycled if there is a break in the powersupply.
E-Clutch
This unit is equipped with an E-Clutch (Electronic Clutch), which
in the event of a stall or wheel pinch, the unit will be shut off to
reduce the reaction torque to the user. The switch needs to be
cycled (turned on and off ) to restarttool.
Brake
When the slider 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. The switch needs to be cycled (turned off and then
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.
Electronic Soft Start
This feature limits the initial start up momentum, allowing the
speed to build up gradually over a 1 secondperiod.
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 tool off and disconnect tool from power
source before making any adjustments or removing/
installing attachments or accessories. Be sure the
trigger switch is in the OFF position. An accidental start-up
can causeinjury.
Attaching Side Handle (Fig.B)
WARNING: Before using the tool, check that the handle is
tightenedsecurely.
Screw the side handle3 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. 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centre.
NOTE: Edge grinding and cutting can be performed with Type
27 wheels designed and specified for this purpose; 6 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 Grinding and Cutting AccessoryChart to select
the proper guard / accessorycombination.

9
ENGLISH
Adjusting and Mounting Guard (Fig. C, D)
CAUTION: Turn unit off and unplug the tool before
making any adjustments or removing or installing
attachments oraccessories.
CAUTION: BEFORE operating the tool, identify which
guard adjustment option your tool is set to.
Adjustment Options
For guard adjustment, the guard release lever9 engages one of
the alignment holes15 on the guard collar using a ratcheting
feature. Your grinder offers two options for thisadjustment.
• One-touchTM: In this position the engaging face is slanted
and will ride over to the next alignment hole when guard
is rotated in a clockwise direction (spindle facing user) but
self-locks in the anti-clockwisedirection.
• Two-touchTM:In this position the engaging face is straight
and squared off. It will NOT ride over to the next alignment
hole unless guard release lever is pressed and held while
simultaneously rotating the guard in either a clockwise or
anti-clockwise direction (spindle facing user).
One-TouchTM Two-TouchTM
Setting Guard Adjustment Options
To adjust the guard release lever9 for desired
adjustmentoption:
1. Remove screw12 using a T20bit.
2. Remove the guard release lever taking note of the spring
position. Choose the end of the lever for the desired
adjustment option. One-touch will use the slanted end of
the lever9 to engage the alignment holes15 on the guard
collar. Two-touch will use the squaredend to engage the
alignmnet holes15 on the guardcollar.
3. Replace the lever, positioning the chosen end under the
spring20. Ensure the lever is in proper contact with
thespring.
4. Replace screw and torque to 2.0-3.0N-m. Ensure proper
installation with spring return function by depressing guard
release lever9.
Mounting Guard (Fig. D)
CAUTION: Prior to mounting guard, ensure the screw,
lever, and spring are fitted correctly before mounting
theguard.
1. With the spindle facing the operator, press and hold the
guard release lever9.
2. Align the lugs13 on the guard with the slots14 on the
gearcase.
3. Push the guard down until the guard lugs engage and
rotate them in the groove on the gear case hub. Release the
guard releaselever.
4. To position the guard:
One-touchTM: Rotate the guard clockwise into the
desired working position. Press and hold the guard release
lever9release lever to rotate the guard in the anti-
clockwisedirection.
Two-touchTM:Press and hold the guard release lever9.
Rotate the guard clockwise or anti-clockwise into the
desired working position.
NOTE: The guard body should be positioned between
the spindle and the operator to provide maximum
operatorprotection.
The guard release lever should snap into one of the
alignment holes15 on the guard collar. This ensures that
the guard issecure.
5. To remove the guard, follow steps 1–3 of these instructions
inreverse.
Flanges and Wheels
Mounting Non-Hubbed Wheels (Fig. E)
WARNING: Failure to properly seat the flange/ clamp nut/
wheel could result in serious injury (or damage to the tool
orwheel).
CAUTION: Included flanges must be used with Type 27
grinding wheels and Type41 and Type 42 cutting wheels.
See the Grinding and Cutting AccessoryChart for
moreinformation.
WARNING: A closed, two-sided cutting wheel guard is
required when using cutting wheels.
WARNING: Use of a damaged flange or guard or failure
to use proper flange and guard can result in injury due
to wheel breakage and wheel contact. See the Grinding
and Cutting AccessoryChart for moreinformation.
1. Place the tool on a table, guardup.
2. Install the unthreaded backing flange4 on spindle2 with
the raised centre (pilot) facing the wheel.
3. Place wheel16 against the backing flange, centreing the
wheel on the raised centre (pilot) of the backingflange.
4. While depressing the spindle lock button and with the
hex depressions facing away from the wheel, thread the
clampnut5 on spindle so that the lugs engage the two
slots in thespindle.
5. While depressing the spindle lock button, tighten the
clamp nut5 using a Hexwrench.
6. To remove the wheel, depress the spindle lock button and
loosen the clampnut.
Mounting Sanding Backing Pads (Fig.B, 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 flange/ clamp nut/
wheel could result in serious injury (or damage to the tool
orwheel).

10
ENGLISH
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17 on
thespindle.
2. Place the sanding disc18 on the backing pad17.
3. While depressing spindle lock1, thread clamp nut19 on
spindle, piloting the raised hub on the clamp nut into the
centre 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.
Mounting Wire Cup Brushes and
WireWheels (Fig.A, B)
WARNING: Failure to properly seat the flange/ clamp nut/
wheel could result in serious injury (or damage to the tool
orwheel).
CAUTION: To reduce the risk of personal injury,
wear work gloves when handling wire brushes and
wheels. They can becomesharp.
CAUTION: To reduce the risk of damage to the tool,
wheel or brush must not touch guard when mounted
or while in use. Undetectable damage could occur to
the accessory, causing wires to fragment from accessory
wheel orcup.
Wire cup brushes or wire wheels install directly on the threaded
spindle without the use of flanges. Use only wire brushes or
wheels provided with a M14 threaded hub. These accessories
are available at extra cost from your local dealer or authorised
servicecentre.
1. Place the tool on a table, guardup.
2. Thread the wheel on the spindle byhand.
3. Depress spindle lock button1 and use a wrench on the
hub of the wire wheel or brush to tighten thewheel.
4. To remove the wheel, reverse the aboveprocedure.
NOTICE: To reduce the risk of damage to the tool, properly
seat the wheel hub before turning the toolon.
Prior to Operation
• Install the guard and appropriate disc or wheel. Do not use
excessively worn discs orwheels.
• Be sure the inner and outer flange are mounted correctly.
Follow the instructions given in the Grinding and Cutting
AccessoryChart.
• Make sure the disc or wheel rotates in the direction of the
arrows on the accessory and thetool.
• 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.
OPERATION
Instructions for Use
WARNING: Always observe the safety instructions and
applicableregulations.
WARNING: To reduce the risk of serious personal
injury, turn tool off and disconnect tool from power
source before making any adjustments or removing/
installing attachments or accessories. Be sure the
trigger switch is in the OFF position. An accidental start-up
can causeinjury.
WARNING:
• Ensure all materials to be ground or cut are secured
inplace.
• Secure and support the workpiece. Use clamps or a
vice to hold and support the workpiece to a stable
platform. It is important to clamp and support the
workpiece securely to prevent movement of the
workpiece and loss of control. Movement of the
workpiece or loss of control may create a hazard and
cause personalinjury.
• 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.
• Always wear regular working gloves while operating
thistool.
• The gear becomes very hot duringuse.
• Apply only a gentle pressure to the tool. Do not exert
side pressure on thedisc.
• Always install the guard and appropriate disc or
wheel. Do not use excessively worn disc orwheel.
• Be sure the inner and outer flange are
mountedcorrectly.
• Make sure the disc or wheel rotates in the direction of
the arrows on the accessory and thetool.
• Avoid overloading. Should the tool become hot, let it
run a few minutes under no load condition to cool the
accessory. Do not touch accessories before they have
cooled. The discs become very hot duringuse.
• Never work with the grinding cup without a suitable
protection guard inplace.
• Do not use the power tool with a cut-offstand.
• Never use blotters together with bonded
abrasiveproducts.
• Be aware, the wheel continues to rotate after the tools
is switchedoff.

11
ENGLISH
Proper Hand Position (Fig.G)
WARNING: To reduce the risk of serious personal injury,
ALWAYS use proper hand position asshown.
WARNING: To reduce the risk of serious personal
injury, ALWAYS hold securely in anticipation of a
suddenreaction.
Proper hand position requires one hand on the side handle3,
with the other hand on the body of the tool, as shown in
FigureG.
Variable Speed Dial (Fig. A)
DWE4357, DWE4369
WARNING: Regardless of the speed setting, the rated
speed of the accessory must be at least equal to the
maximum speed marked on the powertool.
The variable speed dial offers added tool control and enables
the tool to be used at optimum conditions to suit the accessory
andmaterial.
• Turn the dial8 to the desired level. Turn the dial upward for
higher speed and downwards for lowerspeed.
Slider Switch (Fig.A)
CAUTION: Hold the side handle and body of the tool
firmly to maintain control of the tool at start up and
during use and until the wheel or accessory stops rotating.
Make sure the wheel has come to a complete stop before
laying the tooldown.
NOTE: To reduce unexpected tool movement, do not switch
the tool on or off while under load conditions. Allow the grinder
to run up to full speed before touching the work surface. Lift the
tool from the surface before turning the tool off. Allow the tool
to stop rotating before putting itdown.
WARNING: Before connecting the tool to a power supply,
be sure the slider switch is in the off position by pressing
the rear part of the switch and releasing. Ensure the slider
switch is in the off position as described above after any
interruption in power supply to the tool, such as the
activation of a ground fault interrupter, throwing of a
circuit breaker, accidental unplugging, or power failure. If
the slider switch is locked on when the power is connected,
the tool will startunexpectedly.
To start the tool, slide the ON/OFF slider switch7 toward
the front of the tool. To stop the tool, release the ON/OFF
sliderswitch.
For continuous operation, slide the switch toward the front of
the tool and press the forward part of the switch inward. To stop
the tool while operating in continuous mode, press the rear part
of the slider switch andrelease.
Spindle Lock (Fig.B)
The spindle lock1 is provided to prevent the spindle from
rotating when installing or removing wheels. Operate the
spindle lock only when the tool is turned off, unplugged from
the power supply, and has come to a completestop.
NOTICE: To reduce the risk of damage to the tool, do
not engage the spindle lock while the tool is operating.
Damage to the tool will result and attached accessory
may spin off possibly resulting ininjury.
To engage the lock, depress the spindle lock button and rotate
the spindle until you are unable to rotate the spindlefurther.
Surface Grinding, Sanding and Wire
Brushing
CAUTION: Always use the correct guard per the
instructions in thismanual.
WARNING: Metal dust build-up. Extensive use of flap
discs in metal applications can result in the increased
potential for electric shock. To reduce this risk, insert an
RCD before use and clean the ventilation slots daily by
blowing dry compressed air into the ventilation slots
inaccordance with the below maintenanceinstructions.
To perform work on a the surface of a workpiece:
1. Allow the tool to reach full speed before touching the tool
to the worksurface.
2. Apply minimum pressure to the work surface, allowing
the tool to operate at high speed. Material removal rate is
greatest when the tool operates at highspeed.
Angle
3. Maintain an appropriate angle between the tool and work
surface. Refer to the chart according to particularfunction.
Function Angle
Grinding 20˚-30˚
Sanding with Flap Disc 5˚-10˚
Sanding with Backing Pad 5˚-15˚
Wire Brushing 5˚-10˚
4. Maintain contact between the edge of the wheel and the
worksurface.
-If grinding, sanding with flap discs or wire brushing
move the tool continuously in a forward and back
motion to avoid creating gouges in the worksurface.
-If sanding with a backing pad, move the tool constantly
in a straight line to prevent burning and swirling of
worksurface.
NOTE: Allowing the tool to rest on the work surface without
moving will damage the workpiece.
5. Remove the tool from work surface before turning tool off.
Allow the tool to stop rotating before laying itdown.
CAUTION: Use extra care when working over an edge, as
a sudden sharp movement of grinder may beexperienced.

12
ENGLISH
Precautions To Take When Working on a
Painted Workpiece
1. Sanding or wire brushing of lead based paint is NOT
RECOMMENDED due to the difficulty of controlling the
contaminated dust. The greatest danger of lead poisoning is
to children and pregnantwomen.
2. Since it is difficult to identify whether or not a paint contains
lead without a chemical analysis, we recommend the
following precautions when sanding any paint:
Personal Safety
1. No children or pregnant women should enter the work area
where the paint sanding or wire brushing is being done
until all clean up iscompleted.
2. A dust mask or respirator should be worn by all persons
entering the work area. The filter should be replaced daily or
whenever the wearer has difficultybreathing.
NOTE: Only those dust masks suitable for working with lead
paint dust and fumes should be used. Ordinary painting
masks do not offer this protection. See your local hardware
dealer for the proper N.I.O.S.H. approvedmask.
3. NO EATING, DRINKING or SMOKING should be done in the
work area to prevent ingesting contaminated paint particles.
Workers should wash and clean up BEFORE eating, drinking
or smoking. Articles of food, drink, or smoking should not be
left in the work area where dust would settle onthem.
Environmental Safety
1. Paint should be removed in such a manner as to minimize
the amount of dustgenerated.
2. Areas where paint removal is occurring should be sealed
with plastic sheeting of 4 milsthickness.
3. Sanding should be done in a manner to reduce tracking of
paint dust outside the workarea.
Cleaning and Disposal
1. All surfaces in the work area should be vacuumed and
thoroughly cleaned daily for the duration of the sanding
project. Vacuum filter bags should be changedfrequently.
2. Plastic drop cloths should be gathered up and disposed
of along with any dust chips or other removal debris. They
should be placed in sealed refuse receptacles and disposed
of through regular trash pick-upprocedures.
During clean up, children and pregnant women should be
kept away from the immediate workarea.
3. All toys, washable furniture and utensils used by children
should be washed thoroughly before being usedagain.
Edge Grinding and Cutting
WARNING: Do not use edge grinding/cutting wheels for
surface grinding applications because these wheels are
not designed for side pressures encountered with surface
grinding. Wheel breakage and injury mayresult.
CAUTION:Wheels used for edge grinding and cutting
may break or kick back if they bend or twist while the tool
is being used. In all edge grinding/cutting operations, the
open side of the guard must be positioned away from
theoperator.
NOTICE: Edge grinding/cutting with a Type27 wheel
must be limited to shallow cutting and notching—less
than 13mm in depth when the wheel is new. Reduce the
depth of cutting/notching equal to the reduction of the
wheel radius as it wears down. Refer to the Grinding and
Cutting AccessoryChart for more information. Edge
grinding/cutting with a Type 41 wheel requires usage of a
Type 1guard.
1. Allow the tool to reach full speed before touching the tool
to the worksurface.
2. Apply minimum pressure to the work surface, allowing
the tool to operate at high speed. Grinding/cutting rate is
greatest when the tool operates at highspeed.
3. Position yourself so that the open-underside of the wheel is
facing away fromyou.
4. Once a cut is begun and a notch is established in the
workpiece, do not change the angle of the cut. Changing
the angle will cause the wheel to bend and may cause
wheel breakage. Edge grinding wheels are not designed to
withstand side pressures caused bybending.
5. Remove the tool from the work surface before turning
the tool off. Allow the tool to stop rotating before laying
itdown.
Metal Applications
When using the tool in metal applications, make sure that a
residual current device (RCD) has been inserted to avoid residual
risks caused by metalswarf.
If the power supply is shut off by the RCD, take the tool to an
authorised D
e
WALT repairagent.
WARNING: In extreme working conditions, conductive
dust can accumulate inside the machine housing when
working with metal. This can result in the protective
insulation in the machine becoming degraded with a
potential risk of an electricalshock.
To avoid build-up of metal swarf inside the machine, we
recommend to clear the ventilation slots on a daily basis. Refer
toMaintenance.
Cutting Metal
For cutting with bonded abrasives, always use the
guardtype1.
When cutting, work with moderate feed, adapted to the
material being cut. Do not exert pressure onto the cutting disc,
tilt or oscillate themachine.
Do not reduce the speed of running down cutting discs by
applying sidewardpressure.
The machine must always work in an upgrinding motion.
Otherwise, the danger exists of it being pushed uncontrolled
out of thecut.
When cutting profiles and square bar, it is best to start at the
smallest crosssection.

13
ENGLISH
Rough Grinding
Never use a cutting disc forroughing.
Always use the guard type27.
The best roughing results are achieved when setting the
machine at an angle of 30° to 40°. Move the machine back and
forth with moderate pressure. In this manner, the workpiece
will not become too hot, does not discolour and no grooves
areformed.
Cutting Stone
The machine shall be used only for drycutting.
For cutting stone, it is best to use a diamond cutting disc.
Operate the machine only with additional dust protectionmask.
Working Advice
Exercise caution when cutting slots in structuralwalls.
Slots in structural walls are subject to the country-specific
regulations. These regulations are to be observed under all
circumstances.Before beginning work, consult the responsible
structural engineer, architect or the constructionsupervisor.
MAINTENANCE
Your
DeWALT
power tool has been designed to operate
over a long period of time with a minimum of maintenance.
Continuous satisfactory operation depends upon proper tool
care and regularcleaning.
WARNING: To reduce the risk of serious personal
injury, turn tool off and disconnect tool from power
source before making any adjustments or removing/
installing attachments or accessories. Be sure the
trigger switch is in the OFF position. An accidental start-up
can causeinjury.
Lubrication
Your power tool requires no additionallubrication.
Cleaning
WARNING: Blow dirt and dust out of the main housing
with dry air as often as dirt is seen collecting in and around
the air vents. Wear approved eye protection and approved
dust mask when performing thisprocedure.
WARNING: Never use solvents or other harsh chemicals
for cleaning the non-metallic parts of the tool. These
chemicals may weaken the materials used in these parts.
Use a cloth dampened only with water and mild soap.
Never let any liquid get inside the tool; never immerse any
part of the tool into aliquid.
Optional Accessories
WARNING: Since accessories, other than those offered
by
DeWALT
, have not been tested with this product, use
of such accessories with this tool could be hazardous.
To reduce the risk of injury, only
DeWALT
recommended
accessories should be used with thisproduct.
Consult your dealer for further information on the
appropriateaccessories.
Max.
[mm] [mm] Min.
Rotation
[min.–1]
Periphical
speed
[m/s]
Threaded
hole length
[mm]
D b d
d
D
b
125 622,23 10500 80 –
D
125 – – 10500 80 –
D
d
b75 30 M14 10500 45 20.0
D
125 12 M14 10500 80 20.0
Protecting the Environment
Separate collection. Products and batteries marked
with this symbol must not be disposed of with normal
householdwaste.
Products and batteries contain materials that can be
recovered or recycled reducing the demand for raw materials.
Please recycle electrical products and batteries according to
local provisions. Further information is available at
www.2helpU.com.

14
ENGLISH
LED Guide
The section provides a list of possible LED blink patterns, their
causes and corrective solutions. The user or maintenance
personnel can perform some corrective actions, and others
may require the assistance of qualified D
e
WALT technician or
yourdealer.
No-Volt Protection
Problem Solution
The switch is in the on position
and power has been applied. The
unit stayed off.
Cycle the switch to restart.
Kick Back Brake
Problem Solution
A pinch has been sensed by
the tool and the kickback brake
has activated.
Inspect accessory for damage from
pinch and replace if necessary. Adjust
work piece and tool position as
necessary and cycle switch to restart.
Thermal Protection
Problem Solution
The unit has shut down to prevent
permanent damage due to
overheating.
Ensure intake and exhaust vents are
not blocked by users hands, clothing
or debris during use. Reduce frequency
of feathering the tool on/off and cycle
switch to restart and/or unplug the unit
and then plug it back in.
Stall/Overload Protection
Problem Solution
The unit has been in a stalled
condition for an extended period
and it has shut down.
Remove load from tool and cycle the
switch to restart.
Problem Power Line
Problem Solution
The unit is running on a poor
quality power source like a low
quality generator. This power may
damage the tool.
Try another power source, reduce
extension cord length or reduce
equipment used on the power source
at one time.

15
ENGLISH
Grinding and Cutting Accessory Chart
Guard Type Accessory Description How to Fit Grinder
Type 27
Guard
Depressed centre
grinding disc
Type 27 guard
Backing flange
Type 27 depressed
centre wheel
Threaded clamp nut
Flap wheel
Wire wheels
Wire wheels with
threaded nut
Type 27 guard
Wire wheel
Wire cup with
threaded nut
Type 27 guard
Wire brush
Backing pad/
sanding sheet
Type 27 guard
Rubber backing pad
Sanding disc
Threaded clamp nut

16
ENGLISH
Grinding and Cutting Accessory Chart (cont.)
Guard Type Accessory Description How to Fit Grinder
Type 1
Guard
Masonry cutting
disc, bonded
Type 1 guard
Backing flange
Cutting wheel
Threaded clamp nut
Metal
cutting disc,
bonded
Type 1
Guard
OR
Type 27
Guard
Diamond cutting
wheels

17

18
Belgique et
Luxembourg België en Luxemburg
DeWALT - Belgium BVBA
Egide Walschaertsstraat 16
2800 Mechelen
Tel: NL 32 15 47 37 63
Tel: FR 32 15 47 37 64
Fax: [phone]
www.dewalt.be
[email protected]
Danmark DeWALT (Stanley Black&Decker AS)
Roskildevej 22
2620 Albertslund
Tel: [phone]
Fax: [phone]
www.dewalt.dk
[email protected]
Deutschland DeWALT
Richard Klinger Str. 11
65510 Idstein
Tel: [phone]
Fax: [phone]
www.dewalt.de
[email protected]
Ελλάς DeWALT (Ελλάς) Α.Ε.
EΔΡΑ-ΓΡΑΦΕΙΑ : Στράβωνος 7
& Λ. Βουλιαγμένης, Γλυφάδα 166 74, Αθήνα
SERVICE : Ημερος Τόπος 2 (Χάνι Αδάμ) – 193 00 Ασπρόπυργος
Τηλ: 00302108981616
Φαξ: 00302108983570
www.dewalt.gr
[email protected]
España DeWALT Ibérica, S.C.A.
Parc de Negocios “Mas Blau”
Edificio Muntadas, c/Bergadá, 1, Of. A6
08820 El Prat de Llobregat (Barcelona)
Tel: [phone]
Fax: [phone]
www.dewalt.es
[email protected]
France DeWALT (Stanley Black & Decker France SAS)
62 Chemin de la Bruyère
CS 60105,
69574 DARDILLY Cedex
Tel: [phone]
Fax: [phone]
www.dewalt.fr
[email protected]
Schweiz
Suisse
Svizzera
DeWALT
In der Luberzen 42
8902 Urdorf
Tel: 044 - 755 60 70
Fax: 044 - 730 70 67
www.dewalt.ch
[email protected]
Ireland DeWALT
Building 4500, Kinsale Road
Cork Airport Business Park
Cork, Ireland
Tel: [phone]
Fax: [phone]
www.dewalt.ie
[email protected]
Italia DeWALT
via Energypark 6
20871 Vimercate (MB), IT
Tel: [phone]
39 039-9590200
Fax: [phone]
www.dewalt.it
Nederlands DeWALT
Netherlands BVPostbus 83,
6120 AB BORN
Tel: [phone]
Fax: [phone]
www.dewalt.nl
Norge DeWALT
Postboks 4613
0405 Oslo, Norge
Tel: [phone]
Fax: [phone]
www.dewalt.no
[email protected]
Österreich DeWALT
Werkzeug Vertriebsges m.b.H
Oberlaaerstrasse 248, A-1230 Wien
Tel: 01 - 66116 - 0
Fax: 01 - 66116 - 614
www.dewalt.at
[email protected]
Portugal DeWALT
Ed. D Dinis, Quina da Fonte
Rua dos Malhoes 2 2A 2º Esq.
Oeiras e S. Juliao da Barra, paço de Arcos e Caxias
2770 071 Paço de Arcos
Tel: [phone]
Fax: [phone]
www.dewalt.pt
[email protected]
Suomi DeWALT
PL47
00521 Helsinki, Suomi
Puh: 010 400 4333
Faksi: 0800 411 340
www.dewalt.fi
[email protected]
Sverige DeWALT
BOX 94
43122 Mölndal
Sverige
Tel: [phone]
Fax: [phone]
www.dewalt.se
[email protected]
Türkiye Sanayi ve Ticareet Bakanlığı tebliğince kullanim ömrü 7 yıldır.
Stanley Black & Decker Turkey Alet Üretim San. Tic. Ltd.Şti.
AND Kozyataği - İçerenköy Mah. Umut Sok. AND Ofis Sit. No: 10-12 / 82-83-84
Ataşehir/İstanbul, Türkiye
Tel: [phone]
Faks: [phone]
www.dewalt.com.tr
[email protected]
United Kingdom DeWALT, 270 Bath Road;
Slough, Berks SL1 4DX
Tel: [phone]
Fax: [phone]
www.dewalt.co.uk
[email protected]
Australia DeWALT
810 Whitehorse Road Box Hill
VIC 3128 Australia
Tel: Aust 1800 338 002
Tel: NZ 0800 339 258
www.dewalt.com.au
www.dewalt.co.nz
Middle East Africa DeWALT
P.O. Box - 17164,
Jebel Ali Free Zone (South), Dubai, UAE
Tel: [phone]
Fax: [phone]
www.dewalt.ae
[email protected]
N909776 09/20