DeWalt DCG405H2T User manual

DCG405
Final page size: A5 (148mm x 210mm)

B
Copyright DeWALT
English (original instructions) 3

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Fig. A
Fig. B
90˚ 90˚
45
8
11 10
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7
2 1
10
10
11
6
9

2
Fig. E
Fig. C
5
14
13
12
9
5
Fig. F
18
17
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7
19
6
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Fig. D
15
Fig. G

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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
DCG405
Voltage VDC 18
Type 1
Battery type Li-Ion
Power output W800
No-load/rated speed min-1 9000
Wheel diameter mm 125
Wheel thickness (max) mm 6
Spindle diameter M14
Spindle length mm 21.5
Weight (without battery pack) kg 1.74
Noise values and vibration values (triax vector sum) according to EN60745-2-3
LPA (emission sound pressure level) dB(A) 85
LWA (sound power level) dB(A) 96
K (uncertainty for the given sound level) dB(A) 3
Surface grinding
Vibration emission value a
h,AG
= m/s24.4
Uncertainty K = m/s21.5
Disc sanding
Vibration emission value a
h,DS
= m/s2<2.5
Uncertainty K =
m/s21.7
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.
EC-Declaration of Conformity
Machinery Directive
Cordless Small Angle Grinder
DCG405
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.
Markus Rompel
Director Engineering
DeWALT, Richard-Klinger-Straße 11,
65510, Idstein, Germany
26.07.2022
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.
English (original instructions)
CORDLESS SMALL ANGLE GRINDER
DCG405

4
ENGLISH
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 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 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.
Batteries Chargers/Charge Times (Minutes)***
Cat # VDC Ah Weight (kg) DCB104 DCB107 DCB112/
DCB1102 DCB113 DCB115/ DCB1104 DCB116 DCB117 DCB118 DCB132 DCB119
DCB546 18/54 6.0/2.0 1.08 60 270 170 140 90 80 40 60 90 X
DCB547 18/54 9.0/3.0 1.46 75* 420 270 220 135* 110* 60 75* 135* X
DCB548 18/54 12.0/4.0 1.46 120 540 350 300 180 150 80 120 180 X
DCB549 18/54 15.0/5.0 2.12 125 730 450 380 230 170 90 125 230 X
DCB181 18 1.5 0.35 22 70 45 35 22 22 22 22 22 45
DCB182 18 4.0 0.61 60/40** 185 120 100 60 60/45** 60/40** 60/40** 60 120
DCB183/B/G 18 2.0 0.40 30 90 60 50 30 30 30 30 30 60
DCB184/B/G 18 5.0 0.62 75/50** 240 150 120 75 75/60** 75/50** 75/50** 75 150
DCB185 18 1.3 0.35 22 60 40 30 22 22 22 22 22 40
DCB187 18 3.0 0.54 45 140 90 70 45 45 45 45 45 90
DCB189 18 4.0 0.54 60 185 120 100 60 60 60 60 60 120
DCBP034 18 1.7 0.32 27 82 50 40 27 27 27 27 27 50
DCBP518 18 5.0 0.75 50 240 150 120 75 60 50 50 75 150
*Date code 201811475B or later
**Date code 201536 or later
***Battery charge times matrix provided for guidance only; charge times will vary depending on temperature and condition of batteries.
Batteries
Chargers/Charge Times (Minutes)
Cat #
DC
Weight
*Date code 201811475B or later
**Date code 201536 or later
**Battery charge times matrix provided for guidance only; charge times will vary depending on temperature and condition of batteries.
***Battery charge times matrix provided for guidance only; charge times will vary depending on temperature and condition of batteries.

5
ENGLISH
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, clothing and gloves 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.
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 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) Battery tool use and care
a ) Recharge only with the charger specified by the
manufacturer. A charger that is suitable for one type
of battery pack may create a risk of fire when used with
another batterypack.
b ) Use power tools only with specifically designated
battery packs. Use of any other battery packs may create
a risk of injury andfire.
c ) When battery pack is not in use, keep it away from
other metal objects like paper clips, coins, keys, nails,
screws or other small metal objects that can make
a connection from one terminal to another. Shorting
the battery terminals together may cause burns or afire.
d ) Under abusive conditions, liquid may be ejected
from the battery; avoid contact. If contact
accidentally occurs, flush with water. If liquid
contacts eyes, additionally seek medical help. Liquid
ejected from the battery may cause irritation orburns.
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.
ADDITIONAL SPECIFIC SAFETY RULES
Safety Instructions for All 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 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.

6
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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 tool may contact hidden wiring. Contact
with a "live" wire will also 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
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.
FURTHER SAFETY INSTRUCTIONS FOR ALL
OPERATIONS
Causes and Operator Prevention
of Kickback
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 power 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 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 and 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.

7
ENGLISH
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
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.
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
minimise 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 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.
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.
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 battery pack voltage corresponds to the
voltage on the rating plate. Also make sure that the voltage of
your charger corresponds to that of yourmains.
Your DeWALT charger is double insulated in
accordance with EN60335; therefore no earth wire
isrequired.
If the supply cord is damaged, it must be replaced by a
specially prepared cord available through the DeWALT
serviceorganisation.
Mains Plug Replacement
(U.K. & Ireland Only)
If a new mains plug needs to be fitted:
• Safely dispose of the oldplug.
• Connect the brown lead to the live terminal in theplug.
• Connect the blue lead to the neutralterminal.
WARNING: No connection is to be made to the
earthterminal.
Follow the fitting instructions supplied with good quality plugs.
Recommended fuse: 3A.
Using an Extension Cable
An extension cord should not be used unless absolutely
necessary. Use an approved extension cable suitable for
the power input of your charger (see Technical Data). The
minimum conductor size is 1mm2; the maximum length
is30m.
When using a cable reel, always unwind the cablecompletely.
SAVE THESE INSTRUCTIONS

8
ENGLISH
Chargers
DeWALT chargers require no adjustment and are designed to be
as easy as possible tooperate.
Important Safety Instructions for All
Battery Chargers
SAVE THESE INSTRUCTIONS: This manual contains important
safety and operating instructions for compatible battery
chargers (refer to TechnicalData).
• Before using charger, read all instructions and cautionary
markings on charger, battery pack, and product using
batterypack.
WARNING: Shock hazard. Do not allow any liquid to get
inside charger. Electric shock mayresult.
WARNING: We recommend the use of a residual current
device with a residual current rating of 30mA orless.
CAUTION: Burn hazard. To reduce the risk of injury,
charge only DeWALT rechargeable batteries. Other types of
batteries may burst causing personal injury anddamage.
CAUTION: Children should be supervised to ensure that
they do not play with theappliance.
NOTICE: Under certain conditions, with the charger
plugged into the power supply, the exposed charging
contacts inside the charger can be shorted by foreign
material. Foreign materials of a conductive nature such
as, but not limited to, steel wool, aluminum foil or any
buildup of metallic particles should be kept away from
charger cavities. Always unplug the charger from the
power supply when there is no battery pack in the cavity.
Unplug charger before attempting to clean
• DO NOT attempt to charge the battery pack with any
chargers other than the ones in this manual. The charger
and battery pack are specifically designed to worktogether.
• These chargers are not intended for any uses other than
charging DeWALT rechargeable batteries. Any other uses
may result in risk of fire, electric shock orelectrocution.
• Do not expose charger to rain orsnow.
• Pull by plug rather than cord when disconnecting
charger. This will reduce risk ofdamage to electric plug
andcord.
• Make sure that cord is located so that it will not be
stepped on, tripped over, or otherwise subjected to
damage orstress.
• Do not use an extension cord unless it is absolutely
necessary. Use of improper extension cord could result in risk
of fire,electric shock, orelectrocution.
• Do not place any object on top of charger or place
the charger on a soft surface that might block the
ventilation slots and result in excessive internal heat.
Place the charger in a position away from any heat source. The
charger is ventilated through slots in the top and the bottom
of thehousing.
• Do not operate charger with damaged cord or plug—
have them replacedimmediately.
• Do not operate charger if it has received a sharp blow,
been dropped, or otherwise damaged in any way. Take it
to an authorised servicecentre.
• Do not disassemble charger; take it to an authorised
service centre when service or repair is required. Incorrect
reassembly may result in a risk of electric shock, electrocution
orfire.
• In case of damaged power supply cord the supply cord must
be replaced immediately by the manufacturer, its service agent
or similar qualified person to prevent anyhazard.
• Disconnect the charger from the outlet before
attempting any cleaning. This will reduce the risk of
electric shock. Removing the battery pack will not reduce
thisrisk.
• NEVER attempt to connect two chargerstogether.
• The charger is designed to operate on standard
230V household electrical power. Do not attempt to
use it on any other voltage. This does not apply to the
vehicularcharger.
Charging a Battery (Fig. B)
1. Plug the charger into an appropriate outlet before inserting
batterypack.
2. Insert the battery pack 10 into the charger, making sure the
battery pack is fully seated in the charger. The red (charging)
light will blink repeatedly indicating that the charging
process hasstarted.
3. The completion of charge will be indicated by the red
light remaining ON continuously. The battery pack is fully
charged and may be used at this time or left in the charger.
To remove the battery pack from the charger, push the
battery release button 11 on the batterypack.
NOTE: To ensure maximum performance and life of lithium-ion
battery packs, charge the battery pack fully before firstuse.
Charger Operation
Refer to the indicators below for the charge status of the
batterypack.
Charge Indicators
Charging
Fully Charged
Hot/Cold Pack Delay*
*The red light will continue to blink, but a yellow indicator light
will be illuminated during this operation. Once the battery pack
has reached an appropriate temperature, the yellow light will
turn off and the charger will resume the chargingprocedure.
The compatible charger(s) will not charge a faulty battery pack.
The charger will indicate faulty battery by refusing to light or by
displaying problem pack or charger blinkpattern.
NOTE: This could also mean a problem with acharger.
If the charger indicates a problem, take the charger and battery
pack to be tested at an authorised servicecentre.