DeWalt D28111S Instruction Manual
D28111S
Heavy-Duty 4-1/2" (115 mm) Small Angle Grinder
Mini-Esmeriladora Angular de 115 mm (4-1/2")
Mini-Esmerilhadeira Angular 4-1/2" (115 mm)
INSTRUCTION MANUAL
MANUAL DE INSTRUCCIONES
MANUAL DE INSTRUÇÕES
INSTRUÇÕES DE OPERAÇÃO, CENTRO DE SERVIÇOS E CERTIFICADO
DE GARANTIA. ADVERTÊNCIA: LEIA ESTAS INSTRUÇÕES ANTES DE
UTILIZAR O PRODUTO.
Questions? See us on the World Wide Web at www.dewalt.com
¿Dudas? Visítenos en Internet: www.dewalt.com
Dúvidas? Visite-nos na Internet em www.dewalt.com.br
INSTRUCTIVO DE OPERACIÓN, CENTROS DE SERVICIO Y PÓLIZA DE
GARANTÍA. ADVERTENCIA: LÉASE ESTE INSTRUCTIVO ANTES DE USAR
EL PRODUCTO.
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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.
CAUTION: Used without the safety alert symbol indicates a
potentially hazardous situation which, if not avoided, may result
in property damage.
WARNING: To reduce the risk of injury, read the instruction
manual.
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-
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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, 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) 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. 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 or cutting-off 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.
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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 cannon be adequately guarded
or controlled.
f) The arbour size of wheels, flanges, backing pads or
any other accessory must properly fit the spindle of
the power tool. Accessories with arbour holes that do not
match the mounting hardware of the power tool will run out of
balance, vibrate excessively and may cause loss of control.
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 shop 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 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 shock the operator.
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.
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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 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 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 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 operator from broken wheel fragments and
accidental contact with wheel.
c) 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.
d) 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.
e) 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.
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.
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conditions and duration of use, noise from this product may
contribute to hearing loss.
WARNING: Some dust created by power sanding, sawing,
grinding, drilling, and other construction activities contains chemicals
known to cause cancer, birth defects or other reproductive harm.
Some examples of these chemicals are:
• lead from lead-based paints,
• crystalline silica from bricks and cement and other masonry
products, and
• arsenic and chromium from chemically-treated lumber
(CCA).
Your risk from these exposures varies, depending on how often you
do this type of work. To reduce your exposure to these chemicals:
work in a well ventilated area, and work with approved safety
equipment, such as those dust masks that are specially designed
to filter out microscopic particles.
• Avoid prolonged contact with dust from power sanding,
sawing, grinding, drilling, and other construction activities.
Wear protective clothing and wash exposed areas with
soap 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 disburse 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 USE SAFETY GLASSES. Everyday
eyeglasses are NOT safety glasses. Also use face or dust mask if
cutting operation is dusty. All users and bystanders MUST 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.
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 Warnings for Grinders
• 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 smaller the gauge number, the heavier the cord.
Voltage (Volts)
Total length of cord in meters (m)
120 - 127V 0 - 7 7 - 15 15 - 30 30 - 50
220 - 240V 0 - 15 15 - 30 30 - 60 60 - 100
Rated Ampere
range
Minimal cross-sectional area of the
cord in meters (mm
2
)
0 - 6A 1.0 1.5 1.5 2.5
6 - 10A 1.0 1.5 2.5 4.0
10 - 12A 1.5 1.5 2.5 4.0
12 - 16A 2.5 4.0 Not Recommended
WARNING: Always use eye protection. All users and bystanders
must wear eye protection that conforms to ANSI Z87.1.
WARNING: Always wear proper personal hearing protection
that conforms to ANSI S12.6 (S3.19) during use. Under some
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• The label on your tool may include the following symbols. The
symbols and their definitions are as follows:
V ............ volts A ............ amperes
Hz .......... hertz W ........... watts
min ......... minutes
..........alternating current
....... direct current
n
o ........... no load speed
........... Class I Construction ........... earthing terminal
............... (grounded) ...........safety alert symbol
............ Class II Construction …/min .... revolutions or
............... (double insulated) ............... reciprocation
BPM....... beats per minute
..............per minute
sfpm ...... surface feet
.............. per minute (sfpm)
DESCRIPTION (FIG. 1)
WARNING: Never modify the power tool or any part of it.
Damage or personal injury could result.
INTENDED USE
Your angle grinder has been designed for professional grinding and
cutting applications.
DO NOT use under wet conditions or in presence of flammable
liquids or gases.
DO NOT use grinding wheels other than center depressed wheels
and flap-disk.
This 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.
A. Paddle switch D. Guard
B. Lock-off lever E. Side handle
C. Spindle lock
FIG. 1
D
E
A
C
B
ASSEMBLY AND ADJUSTMENTS
WARNING: Prior to assembly and adjustment, ALWAYS unplug
tool.
WARNING: Never use the tool without the guard in place.
Mounting and Removing the Guard
(Fig. 2)
WARNING: Turn off and unplug the tool before making any
adjustments or removing or installing attachments or
accessories. Before reconnecting the tool, depress and release
the paddle switch to ensure that the tool is off.
1. Place the angle grinder on a table, spindle up.
2. Align the lugs (F) with the notches (G).
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– the ring on the flange (M) must face away from the disc when
fitting a cutting disc (C).
5. Press the spindle lock (C) and rotate the spindle (J) until it locks
in position.
6. Tighten the flange (M) with the two-pin spanner supplied.
7. Release the spindle lock.
8. To remove the disc, loosen the flange (M) with the two-pin
spanner.
WARNING: Do not use a damaged disc.
3. Press the guard down and rotate it to the required position.
4. Securely tighten the screw (H).
5. To remove the guard, slacken the screw.
C
F
G
H
G
FIG. 2
Fitting and Removing a Grinding or
Cutting Disc (Fig. 3A, 3B)
1. Place the tool on a table, guard up.
2. Fit the inner flange (I) correctly onto the spindle (J) (fig. 3A).
3. Place the disc (K) on the flange (I). When fitting a disc with a
raised center, make sure that the raised center (L) is facing the
flange (I).
4. Screw the outer flange (M) onto the spindle (J) (fig. 3B):
– the ring on the flange (M) must face towards the disc when
fitting a grinding disc (K);
FIG. 3A FIG. 3B
M
L
K
I
J
C
A
B
J
M
K
I
J
M
K
I
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E
N
N
FIG. 4
Mounting the Side Handle (Fig. 4)
Screw the side handle (E) tightly into one of the holes (N) on either
side of the gear case.
OPERATION
WARNING: Allow the tool to reach full speed before touching tool
to the work surface. Lift the tool from the work surface before
turning the tool off.
WARNING: Ensure all materials to be ground or cut are secured
in place.
WARNING: Apply only a gentle pressure to the tool. Do not exert
side pressure on the disc.
WARNING: Avoid overloading. Should the tool become hot, let it
run a few minutes under no load condition.
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.
Make sure the disc or wheel rotates in the direction of the arrows
on the accessory and the tool.
Paddle Switch
WARNING: Before connecting the tool to a power source
depress and release the paddle switch (A) once without depressing
the lock-on button (B) to ensure that the switch is off. Depress and
release the paddle switch 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 paddle switch is locked on, the tool will start
unexpectedly when it is reconnected.
To turn the tool on, push the lock-off lever (B) toward the back of
the tool, then depress the paddle switch (A). The tool will run while
the switch is depressed. Turn the tool off by releasing the paddle
switch.
WARNING: Do not disable the lock-off lever. If the lock-off lever
is disabled, the tool may start unexpectedly when it is laid down.
WARNING: Do not switch the tool on or off when under load.
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 authorised
D
EWALT 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.
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WARNING: To avoid build-up of metal swarf inside the machine,
we recommend to clear the ventilation slots on a daily basis. Refer
to Maintenance.
Using Flap Discs
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 in accordance with the
below maintenance instructions.
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.
Pop-off Brushes
The motor will be automatically shut off indicating that the carbon
brushes are nearly worn out and that the tool needs servicing.
The carbon brushes are not user-serviceable. Take the tool to an
authorised D
EWALT repair agent.
WARNING: To reduce the risk of injury, turn unit off and
disconnect tool from power source before installing and removing
accessories, before making any adjustments or removing/installing
attachments or accessories.
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.
Accessories
WARNING: Since accessories, other than those offered by
D
EWALT, have not been tested with this product, use of such
accessories with this tool could be hazardous. To reduce the risk of
injury, only D
EWALT, recommended accessories should be used
with this product.
Recommended accessories for use with your tool are available at
extra cost from your local dealer or authorized service center.
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