DeWalt D28476 User manual

D28474/D28476/D28494/D28496 Heavy Duty Large Angle Grinders
Esmeriladoras de ángulo grande para trabajo pesado
Esmerilhadeiras Angulares Para Serviços Pesados
D284076/D28493 Heavy Duty Large Angle Sander/Grinder
Lijadora/Esmeriladora Angular Grande Para Trabajo Pesado
Lixadeira/Esmerilhadeira Angular Para Serviços Pesados
INSTRUCTION MANUAL
MANUAL DE INSTRUCCIONES
MANUAL DE INSTRUÇÕES
INSTRUCTIVO DE OPERACIÓN, CENTROS DE SERVICIO Y PÓLIZA DE
GARANTÍA. ADVERTENCIA: LÉASE ESTE INSTRUCTIVO ANTES DE USAR EL
PRODUCTO.
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.www.dewalt.com.br
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SAVE THESE INSTRUCTIONS
WARNING! Read and understand all instructions. Failure to fol-
low all instructions listed below, may result in electric shock, fire and/or
serious personal injury.
General Safety Instructions
WORK AREA
• Keep your work area clean and well lit. Cluttered benches and
dark areas invite accidents.
• 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.
• Keep bystanders, children, and visitors away while operating
a power tool. Distractions can cause you to lose control.
ELECTRICAL SAFETY
• Grounded tools must be plugged into an outlet properly in-
stalled and grounded in accordance with all codes and ordi-
nances. Never remove the grounding prong or modify the plug
in any way. Do not use any adapter plugs. Check with a quali-
fied electrician if you are in doubt as to whether the outlet is
properly grounded. If the tools should electrically malfunction or
break down, grounding provides a low resistance path to carry
electricity away from the user. Applicable only to Class I
(grounded) tools.
• Double insulated tools are equipped with a polarized plug
(one blade is wider than the other.) This plug will fit in a polar-
ized outlet only one way. If the plug does not fit fully in the out-
let, reverse the plug. If it still does not fit, contact a qualified
electrician to install a polarized outlet. Do not change the plug
in any way. Double insulation eliminates the need for the three
wire grounded power cord and grounded power supply system.
Applicable only to Class II (double insulated) tools.
• Avoid body contact with grounded surfaces such as pipes,
radiators, ranges and refrigerators. There is an increased risk of
electric shock if your body is grounded.
• Don’t expose power tools to rain or wet conditions. Water
entering a power tool will increase the risk of electric shock.
• Do not abuse the cord. Never use the cord to carry the tools
or pull the plug from an outlet. Keep cord away from heat, oil,
sharp edges or moving parts. Replace damaged cords immediate-
ly. Damaged cords increase the risk of electric shock.
• When operating a power tool outside, use an outdoor exten-
sion cord marked “W-A” or “W.” These cords are rated for out-
door use and reduce the risk of electric shock.
Minimum Gage for Cord Sets
PERSONAL SAFETY
• Stay alert, watch what you are doing and use common sense
when operating a power tool. Do not use tool while tired or
under the influence of drugs, alcohol, or medication. A moment
of inattention while operating power tools may result in serious per-
sonal injury.
• Dress properly. Do not wear loose clothing or jewelry. Contain
long hair. Keep your hair, clothing, and gloves away from mov-
ing parts. Loose clothes, jewelry, or long hair can be caught in
150 ft.100 ft.
50 ft.25 ft.
Minimum AWG
Total Length of Cord in Feet
120 V Power Supply
12 AWG14 AWG16 A
12 A
More
Than
Not
More
Than
not recommended
Tool Nameplate
Ampere Rating
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moving parts. Air vents often cover moving parts and should also
be avoided.
• Avoid accidental starting. Be sure switch is off before plug-
ging in. Carrying tools with your finger on the switch or plugging in
tools that have the switch on invites accidents.
• Remove adjusting keys or wrenches before turning the tool
on. A wrench or a key that is left attached to a rotating part of the
tool may result in personal injury.
• Do not overreach. Keep proper footing and balance at all
times. Proper footing and balance enables better control of the tool
in unexpected situations.
• Use safety equipment. Always wear eye protection. Dust mask,
non-skid safety shoes, hard hat, or hearing protection must be
used for appropriate conditions.
TOOL USE AND CARE
• Use clamps or other practical way to secure and support the
workpiece to a stable platform. Holding the work by hand or
against your body is unstable and may lead to loss of control.
• Do not force tool. Use the correct tool for your application. The
correct tool will do the job better and safer at the rate for which it is
designed.
• Do not use tool if switch does not turn it on or off. Any tool that
cannot be controlled with the switch is dangerous and must be
repaired.
• Disconnect the plug from the power source before making any
adjustments, changing accessories, or storing the tool. Such
preventative safety measures reduce the risk of starting the tool
accidentally.
• Store idle tools out of reach of children and other untrained
persons. Tools are dangerous in the hands of untrained users.
• Maintain tools with care. Keep cutting tools sharp and clean.
Properly maintained tools, with sharp cutting edges are less likely
to bind and are easier to control.
• Check for misalignment or binding of moving parts, breakage
of parts, and any other condition that may affect the tools
operation. If damaged, have the tool serviced before using. Many
accidents are caused by poorly maintained tools.
• Use only accessories that are recommended by the manufac-
turer for your model. Accessories that may be suitable for one
tool may become hazardous when used on another tool.
SERVICE
• Tool service must be performed only by qualified repair per-
sonnel. Service or maintenance performed by unqualified person-
nel could result in a risk of injury.
• When servicing a tool, use only identical replacement parts.
Follow instructions in the Maintenance section of this manual. Use
of unauthorized parts or failure to follow Maintenance instructions
may create a risk of electric shock or injury.
Additional Specific Safety Instructions
for Grinders
• Always use proper guard with grinding wheel. A guard protects
operator from broken wheel fragments and wheel contact.
• Accessories must be rated for at least the speed recom-
mended on the tool warning label. Wheels and other acces-
sories running over rated speed can fly apart and cause injury.
Refer to the table below. Accessory ratings are above rated no-load
tool speeds because actual tool speeds may vary.
NOTE: the rated no load tool speed is printed on the name plate and
embossed on the gear case.
• Hold tool by insulated gripping surfaces when performing an
operation where the cutting tool may contact hidden wiring or
its own cord. Contact with a “live” wire will make exposed metal
parts of the tool “live” and shock the operator.
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CAUTION: Wear appropriate personal hearing protection dur-
ing use. Under some conditions and duration of use, noise from this
product may contribute to hearing loss.
WARNING: Some dust created by power sanding, sawing, grind-
ing, 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 equip-
ment, such as those dust masks that are specially designed to fil-
ter out microscopic particles.
•Avoid prolonged contact with dust from power sanding, saw-
ing, 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.
• The label on your tool may include the following symbols.
V ....................volts
A ....................amperes
Hz ..................hertz
W ....................watts
min..................minutes
..................alternating current
................direct current
no....................no load speed
..................Class II Construction
5000 RPM
6500 RPM
8500 RPM
5500 RPM
6600 RPM
8500 RPM
Minimum
Accessory
Rating
Rated no
(no load)
Tool Speed
• Before using, inspect recommended accessory for cracks or
flaws. If such a crack or flaw is evident, discard the accessory. The
accessory should also be inspected whenever you think the tool
may have been dropped.
• When starting the tool with a new or replacement wheel, or a
new or replacement wire brush installed, hold the tool in a well
protected area and let it run for one minute. If the wheel has an
undetected crack or flaw, it should burst in less than one minute. If
the wire brush has loose wires, they will be detected. Never start
the tool with a person in line with the wheel. This includes the oper-
ator.
• In operation, avoid bouncing the wheel or giving it rough treat-
ment. If this occurs, stop the tool and inspect the wheel.
•Direct sparks away from operator, bystanders or flammable
materials. Sparks may be produced while using a sander or
grinder. Sparks may cause burns or start fires.
• Always use side handle. Tighten the handle securely. The side
handle should always be used to maintain control of the tool at all
times.
CAUTION: Use extra care when grinding into a corner because a
sudden, sharp movement of the grinder may be experienced when the
wheel contacts a secondary surface.
• Clean out your tool often, especially after heavy use. Dust and
grit containing metal particles often accumulate on interior surfaces
and could create an electric shock hazard.
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or right of its original position. See page 8 for instructions on rotat-
ing the gear case.
MULTIPLE SIDE HANDLE POSITIONS
The side handle can be properly positioned in five locations based
on personal preference and application. The side handle must be
used at all times to maintain proper control of the tool.
RUBBER BUMPER
The gear case rubber bumper may wear with use. The bumper can
be replaced with part number 397711-00 available at extra cost
from DEWALT authorized service centers. Replacement should be
performed by DEWALT authorized service centers or qualified serv-
ice personnel.
SPINDLE LOCK
The spindle lock pin is provided to prevent the spindle from rotating
when installing or removing wheels. Operate the spindle lock pin
only when the tool is turned off and unplugged from the power
source. To engage the lock, depress the spindle lock button (C) and
rotate the spindle until you are unable to rotate it further.
A
B
D
…/min............revolutions or reciprocation per minute
.................. earthing terminal
..................safety alert symbol
FAMILIARIZATION
Large Angle Grinders and Large Angle Sanders are designed for
heavy material removal in extended use applications. The following
grinders and sanders are described in this manual.
D28494W 7” Angle Grinder 6,500 rpm
D28476W 7” Angle Grinder 8,500 rpm
D28494M 9” Angle Grinder 6,500 rpm
D28496M 9" Angle Grinder 6,500 rpm
D28493P 7”/9” Angle Sander 5,000 rpm
D28474W 7" Angle Grinder 8,500 rpm
D284076 7"/9" Angle Grinder/Sander 6,500 rpm
Components
A. Trigger Switch B. Lock On Button
C. Spindle Lock D. Side Handle
E. Spindle F. Soft Mount
G. Rubber Bumper
Features
SWITCH
The tool is controlled by a trigger switch (A). A lock-on button (B)
provides increased comfort in extended use applications.
ROTATING GEAR CASE (D28474, D28476, D284076, D28493,
D28494, D28496)
For applications in which a tool will be dedicated for uses in edge
grinding and finishing work, the gear case may be rotated 90° left
E
F
CG
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NOTE: Never depress the spindle lock button
while the grinder is running. Never turn on the
grinder while the spindle lock button is
depressed. Damage to your tool may result.
SOFT MOUNT
The grinder is equipped with a soft mount,
enabling easy wheel installation and removal.
Accessories and
Attachments
It is important to choose the correct
guards, backing pads and flanges to use
with grinder accessories. See the chart
on pages 5-8 for information on choosing
the correct accessories.
CAUTION: Accessories must be rated for at least the speed
recommended on the tool warning label. Wheels and other acces-
sories running over rated speed can fly apart and cause injury.
ATTACHMENTS
Attachments designed specifically for this grinder can be pur-
chased through DEWALT dealers and DEWALT Factory Service
centers.
D284939 9” Type 27 guard
D284948 9” Type 28 guard
D284937 7” Type 27 guard
D284936 6” Type 11 Flaring cup guard with flange
D284934 4” Type 11 Flaring cup guard with flange
D284933 Type 11 flaring cup wheel backing flange
D284932 Type 1 Flange set
D284931 7” Type 1 Guard
C
Sanding Flap Discs
soft mount soft mount
type 27 guard
D284937/D284939
type 27 guard
D284937/D284939
hubbed sanding flap
disc
non-hubbed sanding
flap disc
clamp nut
22191-00
backing flange
54339-00
NOTE: Wheel size must match guard size; i.e. a new 7” wheel may
not be used with a 9” guard. The bottom surface of wheel must be
inside the bend of the guard lip.
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Grinding Wheels
soft mount
type 27 guard
D284937/D284939
type 27 hubbed wheel
soft mount
type 28 guard
D284938
type 28 hubbed wheel
soft mount
type 27 guard
D284937/D284939
backing flange
54339-00
type 27 non-hubbed
wheel
clamp nut
22191-00
soft mount
type 28 guard
D284938
backing flange
54339-00
type 28 non-hubbed
wheel
Sanding Discs
soft mount
rubber backing pad
DW4947
sanding disc
clamp nut
included with
D4947
clamp nut
22191-00
NOTE: Wheel size must match guard size; i.e. a new 7” wheel may not be used with a
9” guard. The bottom surface of wheel must be inside the bend of the guard lip.
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Flaring Cup Stones
Wire Wheels
soft mount
soft mount
wire cup brush
wire wheel
type 11 flaring cup guard
D284934 — 4”
D284936 — 6”
backing flange
608368-00
flaring cup stone
NOTE: Wheel size must match guard size; i.e. a 7” wheel may not
be used with a 9” guard.
Cutting Wheels
soft mount soft mount
type 1 guard
D284931
type 1 guard
D284931
backing flange
608370-00
backing flange
608370-00
abrasive cutting wheel diamond cutting wheel
clamp nut
608463-00
clamp nut
608463-00
type 27 guard
D284937/D284939
type 27 guard
D284937/D284939
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4. Before turning the tool on, ensure that the handle is locked into
a position and the handle release lever has returned to the orig-
inal position flush with the tool housing.
Rotating the Gear Case
Turn off and unplug tool before making any adjustments or
removing or installing accessories. Before reconnecting the
tool, depress and release the trigger switch to ensure that the
tool is off.
1. Remove the four corner
screws attaching the gear
case to motor housing.
2. Without separating the gear
case from motor housing,
rotate the gear case head to
desired position.
NOTE: If the gear case and motor housing become separated by
more than 1/8”, the tool must be serviced and re-assembled by a
DEWALT service center. Failure to have the tool serviced may
cause brush, motor and bearing failure.
3. Re-install screws to attach the gear case to the motor housing.
Tighten screws to 20 in lbs torque. Overtightening could cause
screws to strip.
OPERATION
Power Source
Plug the Large Angle Grinder into a dedicated electrical circuit.
Operating this tool on a circuit with other tools will decrease tool
performance.
Switch
CAUTION: Before connecting the tool to a power source or after
a power failure, depress and release the trigger switch (A) once
054339-00 Grinding backing flange
22191-00 Clamp nut
61820-01 Wheel Wrench
445928-01 Soft mount spindle protector
397711-00 Rubber gear case bumper
ASSEMBLY AND ADJUSTMENTS
Attaching the Side Handle
To install the side handle, thread the handle into one of the five
positions listed below and tighten securely by turning clockwise.
•Two front positions: Forward handle positions are designed
for optimized balance in surface finishing applications.
•Two rear positions: Rear handle positions are designed for
optimized balance in edge grinding applications.
•One top position: Top handle position is designed for edge
grinding applications.
NOTE: D284076 includes only three handle positions.
Rotating the Rear Handle
Turn off and unplug tool before making any adjustments or
removing or installing accessories.
Before reconnecting the tool, depress
and release the trigger switch to ensure
that the tool is off.
1. Unlock the rear handle by pulling out
the Handle Release Lever (G) as
shown.
2. Rotate handle into available 0°, 30°,
60° or 90° position left OR right of
center.
3. Push in the handle release lever.
G
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without depressing the lock-on button
(B) to ensure that the switch is in the off
position. If the trigger switch is locked
on, the tool will start unexpectedly
when power is reconnected to the tool.
Hold the side handle and rear handle
firmly to maintain control of tool at start
up and during use.
TRIGGER OPERATION
To turn the tool on, depress the trigger switch (A). The tool will
remain running while the trigger is depressed. Turn the tool off by
releasing the trigger.
TRIGGER OPERATION WITH LOCK-ON FEATURE
To turn tool on, depress trigger. Depress and hold lock-on button
(B) while releasing trigger. Lock-on button will remain depressed
and tool will remain on.
To turn the tool off, depress and release trig-
ger. The lock pin button will pop out, permitting
the trigger to disengage and causing the tool to
turn off.
NOTE: Allow the tool to reach full speed before
touching tool to work surface. Lift the tool from
the work surface before turning the tool off.
CAUTION: Make sure the wheel has come
to a complete stop before setting the tool down.
REMOVAL OF LOCK-ON FEATURE
The lock-on button can be permanently removed without compro-
mising compliance with regulatory agencies shown on the tool’s
nameplate. Removal of the lock pin must be done by a DEWALT
Service Center.
Mounting and Using Depressed Center
Grinding Wheels and Sanding Flap
Discs
MOUNTING AND REMOVING GUARD
Turn off and unplug tool before making any adjustments or
removing or installing accessories. Before reconnecting the
tool, depress and release the trigger switch to ensure that the
tool is off.
IMPORTANT INFORMATION ABOUT GUARDS
Guards must be used with all grinding wheels, sanding flap discs,
wire brushes and wire wheels. The tool may be used without a
guard only when sanding with conventional sanding discs.
DEWALT models D28493, D28494, D28474, and D28476 are pro-
vided with a guard intended for use with depressed center wheels
(Type 27), and hubbed grinding wheels (Type 27). The same guard
is designed for use with sanding flap discs, wire brushes and wire
wheels. Grinding and cutting with wheels other than Type 27 and
29 require different accessory guards not included with the tool.
Mounting instructions for these accessory guards are included in
the accessory package.
CAUTION: When using a grinding wheel
with a type 27, 28 or 29 guard, be sure that
the bottom surface of the grinding wheel is
inside the the guard lip.
CAUTION
: D E WALT model D284076
Angle Sander may only be used for grinding
by using appropriate accessory guard.
1. Open the guard latch (H), and align the
lugs with slots on the gear case cover.
Position the guard facing backward, as
shown.
90˚ 90˚
A
B
GRINDING
WHEEL
SURFACE
GUARD
LIP
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2. Push the guard down until the guard lugs engage and rotate
freely in the groove on the gear case hub.
3. With the guard latch open, rotate the
guard into the desired working position
that provides maximum protection to
the user as shown.
4. Close the guard latch to secure the
guard on the gear case. You should be
unable to rotate the guard by hand
when the latch is closed. Do not oper-
ate the grinder with a loose guard or the clamp lever in open
position.
5. To remove the guard, follow the proce-
dure above in reverse order.
NOTE: The guard is pre-adjusted to the
diameter of the gear case hub at the fac-
tory. If, after a period of time, the guard
becomes loose, tighten the adjusting
screw (I) with clamp in the closed position.
CAUTION: Do not tighten the adjusting
screw with the clamp lever in open position.
Undetectable damage to the guard or the
mounting hub may result.
MOUNTING AND REMOVING HUBBED
WHEELS
Hubbed wheels install directly on the 5/8"–
11 threaded spindle.
1. Thread the wheel on the spindle by hand, seating the wheel
against the soft mount.
2. Depress the spindle lock button and use a wrench to tighten the
hub of the wheel.
3. Reverse the above procedure to remove the wheel.
CAUTION: Failure to properly seat the wheel against the soft
mount before turning the tool on may result in damage to the tool
or the wheel.
MOUNTING NON-HUBBED WHEELS
Depressed center, Type 27 grinding wheels must be used with
available accessory flanges. See the chart on pages 5-8 of this
manual for more information.
1. Install the metal backing flange (J) on spindle (E) against the
soft mount.
2. Place wheel against the backing flange, cen-
tering the wheel on the backing flange pilot.
3. While depressing the spindle lock button,
thread the clamp nut (K) on spindle, piloting
the raised hub on clamp nut in the center of
grinding wheel.
4. Tighten the clamp nut with a wrench.
5. Reverse the above procedure to remove the
wheel.
SURFACE GRINDING WITH GRINDING
WHEELS
1. Allow the tool to reach full speed before
touching tool to work surface.
2. Apply minimum pressure to work surface, to allow the tool to
operate at high speed.
3. Maintain a 20˚ to 30˚ angle between the tool and work surface.
4. Continuously move the tool in a forward and
back motion to avoid creating gouges in the
work surface.
5. Remove the tool from work surface before
J
E
K
20˚- 30˚
H
I
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turning tool off. Allow the tool to stop rotating before setting it
down.
EDGE GRINDING WITH GRINDING WHEELS
CAUTION: Wheels used for cutting and edge grinding may break
if they bend or twist while the tool is being used to do cut-off work or
deep grinding. To reduce the risk of serious injury, limit the use of
these wheels with a standard type 27 guard to shallow cutting and
notching (less than 1/2" in depth). The open side of the guard must
be positioned away from the operator. For deeper cutting with a type
1 wheel, use a closed, type 1 guard (FIG. 2). Type 1 guards are avail-
able at extra cost from your local dealer or authorized service center.
1. Allow the tool to reach full speed before touching the tool to the
work surface.
2. Apply minimum pressure to work surface, to allow the tool to
operate at high speed.
3. Protect yourself during edge finishing by directing the open side
of the guard away from you.
4. Move the tool continuously in a forward and back motion to
avoid creating gouges in the work surface.
5. Remove tool from work surface before turning the tool off. Allow
the tool to stop rotating before setting it down.
WARNING: Do not use edge grinding wheels for surface grind-
ing applications because edge grinding wheels are not designed for
side pressures encountered with surface grinding. Wheel breakage
and injury may result.
SURFACE FINISHING WITH SANDING FLAP DISCS
1. Allow the tool to reach full speed before touching tool to work
surface.
2. Apply minimum pressure to work surface, to allow the tool to
operate at high speed.
3. Maintain a 5˚ to 10˚ angle between the tool and work surface.
4. Continuously move the tool in a forward and
back motion to avoid creating gouges in the
work surface.
5. Remove the tool from work surface before
turning tool off. Allow the tool to stop rotating before setting it
down.
Mounting and Using Sanding Backing
Pads
Sanding pads and sanding discs must be rated above minimum
accessory speed as shown on tool. Recommended sanding back-
ing pads and sanding discs are available at extra cost from
DEWALT service centers and DEWALT dealers.
NOTE: Guard may be removed for sanding applications with back-
ing pads and sanding discs. Sanding flap discs are considered
grinding wheels by ANSI standards and require the use of a guard.
(See Mounting and Using Depressed Center Grinding Wheels and
Sanding Flap Discs).
MOUNTING SANDING BACKING PADS
Turn off and unplug tool before making any adjustments or
removing or installing accessories. Before reconnecting the
tool, depress and release the trigger switch to ensure that the
tool is off.
CAUTION: Proper guard must be re-installed for grinding wheel,
sanding flap disc, wire brush, or wire wheel applications after sand-
ing applications are complete.
1. Place or appropriately thread rubber backing pad (L) down to
soft mount.
2. Place the sanding disc (M) on the rubber backing pad (L).
5˚- 10˚
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3. While depressing spindle lock, thread
clamp nut (N) on spindle, piloting the
raised hub on the clamp nut into the center
of sanding disc and backing pad.
4. Tighten the clamp nut with the proper
wrench.
5. To remove the wheel, reverse the above
procedure.
USING SANDING BACKING PADS
Choose the proper grit sandpaper for your appli-
cation. Sandpaper is available in various grits.
Coarse grits yield faster material removal rates
and a rougher finish. Finer grits yield slower
material removal and a smoother finish.
Begin with coarser grit discs for fast, rough material removal.
Move to a medium grit paper and finish with a fine grit disc for
optimal finish.
Coarse 16 - 30 grit
Medium 36 - 80 grit
Fine Finishing 100 - 120 grit
Very Fine Finishing 150 – 180 grit
1. Allow the tool to reach full speed before touching tool to work
surface.
2. Apply minimum pressure to work surface, allowing tool to oper-
ate at high speed.
3. Maintain a 5˚ to 15˚ angle between the tool and work surface.
The sanding disc should contact approximately one inch of work
surface.
4. Move the tool constantly in a straight line to prevent burning and
swirling of work surface. Allowing the tool to rest on the work sur-
face without moving, or moving the tool in a circular motion
causes burning and swirling marks on the work surface.
5. Remove the tool from the work surface before turning the tool
off. Allow the tool to stop rotating before setting it down.
Mounting and Using Wire Brushes and
Wire Wheels
Turn off and unplug tool before making any adjustments or
removing or installing accessories. Before reconnecting the
tool, depress and release the trigger switch to ensure that the
tool is off.
Wire brushes and wire wheels must be rated above minimum
accessory speed as shown on tool. Use only wire brushes and
wheels provided with a 5/8"–11 or M-14 threaded hub. A type 27
guard is required when using wire brushes and wheels.
CAUTION: Wear work gloves when handling wire brushes or
wheels. Wire brushes and wheels can become sharp.
MOUNTING WIRE BRUSHES AND WIRE WHEELS
1. Thread the wheel on the spindle by hand, seating the wheel
against the soft mount.
2. Depress the spindle lock button and use a wrench on the hub of
the wire brush or wheel to tighten the wheel.
3. To remove the wheel, depress the spindle lock button and use a
wrench on the hub of the wire brush or wheel to loosen it.
NOTE: Failure to properly seat the wheel hub against the soft
mount before turning the tool on may result in damage to the tool
or wheel.
USING WIRE CUP BRUSHES AND WIRE WHEELS
Wire wheels and brushes can be used for removing rust, scale and
paint, and for smoothing irregular surfaces.
5˚-15˚
N
L
M
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1. Allow tool to reach full speed before touching tool to work sur-
face.
2. Apply minimum pressure to work surface, to allow the tool to
operate at high speed.
3. Maintain a 5˚ to 10˚ angle between the tool and
work surface for wire cup brushes.
4. Maintain contact between the edge of the
wheel and the work surface with wire wheels.
5. Continuously move the tool in a forward and
back motion to avoid creating gouges in the
work surface. Allowing the tool to rest on the
work surface without moving, or moving the
tool in a circular motion causes burning and
swirling marks on the work surface.
6. Remove the tool from the work surface
before turning the tool off. Allow the tool to
stop rotating before setting it down.
Mounting and Using Flaring Cup
(Type 11) Wheel
MOUNTING FLARING CUP WHEEL GUARD
WARNING: The flaring cup wheel guard is not included with this
tool. Flaring cup wheels require proper flanges and guards. 4” flar-
ing cup wheel guard D284934 and 6” flaring cup wheel guard
D284936 are available as accessories and include proper flange.
Failure to use the proper flange and guard can result in injury
resulting from wheel breakage and wheel contact.
Turn off and unplug tool before making any adjustments or
removing or installing accessories. Before reconnecting the
tool, depress and release the trigger switch to ensure that the
tool is off.
1. Install the guard as shown.
2. Guard body should be positioned
between the spindle and the operator to
provide maximum operator protection.
3. Securely tighten the two clamping
screws (W) supplied with the guard.
MOUNTING FLARING CUP WHEEL
1. Remove the soft mount (F).
2. Install the flaring cup wheel backing flange, aligning the flats on
spindle (O) with the flats on backing flange (P).
3. Thread the flaring cup wheel on spindle by hand, seating wheel
against backing flange.
4. Depress the spindle lock button and tighten the wheel by hand.
5. To remove the wheel, reverse the above procedure.
CAUTION: Failure to properly seat the wheel against backing
flange before turning the tool on may result in damage to the tool
or the wheel.
NOTE: Adjust the guard skirt so that only 1/8” of the wheel is
exposed below the skirt.
USING A FLARING CUP WHEEL
Flaring cup wheels are designed for heavy material removal.
W
5˚-10˚
F
O
P
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1. Allow the tool to reach full speed before touching tool to work
surface.
2. Apply minimum pressure to work surface, allowing the tool to
operate at high speed.
3. Maintain a 5˚ to 10˚angle between the tool and
the work surface.
4. Continuously move the tool in a forward and back motion to
avoid creating gouges in the work surface.
5. Remove the tool from work surface before turning tool off. Allow
the tool to stop rotating before setting it down.
Mounting and Using Cutting (Type 1)
Wheels
Cutting wheels include diamond wheels and abrasive discs.
Abrasive cutting wheels for metal and concrete use are available.
Diamond blades for concrete cutting can also be used.
WARNING: A closed, cutting wheel guard is not included with this
tool. Cutting wheels require proper flanges and guards. A 7” cutting
guard, D284931, is available as an accessory and includes proper,
matching flanges. Failure to use proper flange and guard can result
in injury resulting from wheel breakage and wheel contact.
MOUNTING CLOSED (TYPE 1) GUARD
Turn off and unplug tool before making any adjustments or
removing or installing accessories. Before reconnecting the
tool, depress and release the trigger switch to ensure that the
tool is off.
1. Open the guard latch (H), and align the lugs with slots on the
gear case cover. Position the guard facing backward, as shown.
2. Push the guard down until the guard lug engages and rotates
freely in the groove on the gear case hub.
3. Rotate guard (Q) into desired working posi-
tion. The guard body should be positioned
between the spindle and the operator to pro-
vide maximum operator protection.
4. Close the guard latch to secure the guard on
the gear case cover. You should be unable to
rotate the guard by hand when the latch is in
closed position. Do not operate grinder with
a loose guard or clamp lever in open posi-
tion.
NOTE: The guard is pre-adjusted to the dia-
meter of the gear case hub at the factory. If,
after a period of time, the guard becomes
loose, tighten the adjusting screw (I) with the
clamp lever in the closed position.
CAUTION: Do not tighten adjusting screw
with clamp lever in open position. Undetectable
damage to guard or mounting hub may result.
MOUNTING CUTTING WHEELS
1. Remove Soft Mount (F).
F
O
R
H
Q
I
5˚-10˚
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2. Install wheel backing flange, aligning flats on spindle (O) with
flats on backing flange (R).
3. Place the wheel on the backing flange, centering the wheel on
the backing flange pilot.
4. Install the clamp nut, ensuring that the wheel remains centered
on the backing flange.
5. Depress the spindle lock button and tighten clamp nut with
wrench.
6. Reverse the above procedure to remove the wheel.
USING CUTTING WHEELS
1. Allow tool to reach full speed before touching tool to work sur-
face.
2. Apply minimum pressure to work surface, allowing tool to oper-
ate at high speed.
3. Once you begin a cut, maintain the angle of the cutting wheel to
the work surface. This will keep you from bending the wheel
which could result in wheel breakage and injury.
4. Remove the tool from work surface before turning tool off. Allow
the tool to stop rotating before setting it down.
MAINTENANCE
Cleaning
Blowing dust and grit out of the motor housing using clean, dry
compressed air is a necessary regular maintenance procedure.
Dust and grit containing metal particles often accumulate on interior
surfaces and could create an electrical shock hazard if not fre-
quently cleaned out. ALWAYS WEAR SAFETY GLASSES.
CAUTION: Never use solvents or other harsh chemicals for
cleaning the non-metallic parts of the tool. Use a clean, dry rag only.
Lubrication
DEWALT tools are properly lubricated at the factory and are ready
for use.
Repairs
To assure product SAFETY and RELIABILITY, repairs, mainte-
nance and adjustment should be performed by authorized service
centers or other qualified service personnel. Always use identical
replacement parts.
Motor Brushes
When brushes become worn, the tool will automatically stop, pre-
venting damage to the motor. Brush replacement should be per-
formed by DEWALT authorized service centers or other qualified
service personnel. Qualified service personnel should follow the
procedures below when replacing motor brushes.
Turn off and unplug tool before making any adjustments or
removing or installing accessories. Before reconnecting the
tool, depress and release the trigger switch to ensure that the
tool is off.
1. Remove the brush doors located on the sides of motor housing.
2. To remove the brush, hold the female terminal, which is attached
to the brush lead wire, and disconnect the female terminal from
the male terminal.
3. Pull the brush straight up out of the brush holder.
4. Replace brushes, in pairs, with original DEWALT brushes avail-
able from DEWALT authorized service centers.
5. Ensure that the brushes slide freely in brush box.
6. Reconnect the brush lead wire to brush box terminal.
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7. Re-install the brush doors before using the tool. Torque screws
to 10 in-lbs, maximum. Overtightening may cause screws to
strip.
Purchasing Accessories
Recommended accessories for use with your tool are available at
extra cost from you local dealer or authorized service center.
CAUTION: The use of any other accessory not recommended
for use with this tool could be hazardous.
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Medidas generales de seguridad
¡ADVERTENCIA! Lea y comprenda todas las instrucciones. El
no cumplir con todas las advertencias a continuación podría resultar
en el riesgo de un choque eléctrico, incendio o de lesiones graves.
CONSERVE ESTAS INSTRUCCIONES
Instrucciones generales de seguridad
ÁREA DE TRABAJO
•Conserve el área de trabajo limpia y bien iluminada. Las ban-
cas desordenadas y las zonas oscuras podrían ocasionar acciden-
tes.
•No opere herramientas eléctricas en atmósferas explosivas,
como en presencia de líquidos, gases o polvos inflamables.
Las herramientas eléctricas producen chispas que pueden incen-
diar el polvo o los vapores.
•Mantenga a los niños, visitantes y demás personas alejadas
mientras opera una herramienta eléctrica. Las distracciones
pueden hacer que pierda el control.
SEGURIDAD ELÉCTRICA
•Las herramientas de conexión a tierra deben conectarse a una
toma de corriente instalada puesta a tierra debidamente en
conformidad con todos los códigos y regulaciones locales.
Nunca retire la clavija de conexión a tierra, no modifique el
enchufe ni utilice adaptadores. Consulte con un electricista
calificado si tiene dudas acerca de la conexión a tierra apro-
piada de su toma de corriente. En el caso que la herramienta
tuviese una falla eléctrica, la puesta a tierra proporciona una vía de
baja resistencia para alejar la electricidad del usuario. Aplicable
únicamente a herramientas clase I (puestas a tierra).
•Las herramientas con doble aislamiento están equipadas con
una clavija polarizada (con una pata más ancha que la otra.)
Esta clavija se acoplará únicamente en una toma de corriente
polarizada en un sentido. Si la clavija no se acopla al contacto,
inviértala. Si aún así no se ajusta, comuníquese con un electricista
calificado para que le instalen una toma de corriente polarizada
apropiada. El doble aislamiento elimina la necesidad de cables
con tres hilos y sistemas de alimentación de conexión a tierra.
Aplicable a herramientas clase II (con doble aislamiento).
•Evite el contacto corporal con las superficies puestas a tierra
incluyendo las tuberías radiadores, hornos y refrigeradores.
Existe un gran riesgo de choque eléctrico si su cuerpo hace tierra.
•No exponga las herramientas eléctricas a la lluvia o a condi-
ciones de mucha humedad. El agua que penetra las herra-
mientas eléctricas aumenta el riesgo de un choque eléctrico.
•No maltrate el cable. Nunca sujete el cable para transportar la
herramienta ni para desconectarla de la toma de corriente.
Mantenga el cable alejado del calor, aceite, bordes afilados o del
calor. Cambie inmediatamente los cables dañados. Los cables
dañados aumentan el riesgo de choque eléctrico.
•Cuando opere una herramienta eléctrica a la intemperie, utili-
ce una extensión con el sello “W-A” o “W”. Estas extensiones
están clasificadas para uso a la intemperie y para reducir el riesgo
de choques eléctricos.
SEGURIDAD PERSONAL
•Esté alerta, concéntrese en lo que está haciendo. Recurra al
sentido común cuando opere una herramienta eléctrica. No
opere ninguna herramienta si se encuentra fatigado o bajo la
influencia de drogas, alcohol o medicamentos. Un momento de
Mas de
12 16 14 12
No Mas de
Longitud total del cordón en metros
Calibre del cordón AWG
No recomendado
30,4 - 450 - 7,6 7,6 - 15,2 15,2 - 30,4
Fuente de Alimentación de 120 voltios
Grado del Amperio
de la Placa de Identificación
de la Herramienta.
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desatención mientras se operan herramientas eléctricas puede
ocasionar lesiones graves.
•Vístase apropiadamente. No use ropa holgada ni joyería.
Cubra o recójase el cabello. Mantenga el cabello, la ropa y los
guantes alejados de las partes en movimiento. La ropa floja,
joyería o el cabello largo podría quedar atrapado en las partes
móviles. Los escapes de aire algunas veces cubren las partes en
movimiento y también deben ser evitadas.
•Evite el encendido accidental. Asegúrese que el interruptor esté
apagado antes de conectar. El sujetar una heramienta con el dedo
en el interruptor o conectarla sin fijarse si el interruptor está en
posición de encendido podría ocasionar un accidente.
•Retire las llaves de ajuste antes de encender la herramienta.
Una llave que se deja en una pieza giratoria puede ocasionar
lesiones personales.
•No se sobre extienda. Mantenga siempre los pies bien apoyados,
al igual que el equilibrio. La posición correcta de los pies y el equi-
librio permiten controlar mejor la herramienta en situaciones ines-
peradas.
•Utilice equipo de seguridad. Siempre utilice protección para
los ojos. Se deben utilizar mascarillas contra polvo, zapatos anti-
deslizantes, casco o protectores para los oídos conforme sea
necesario.
USO Y CUIDADOS DE LA HERRAMIENTA
•Utilice prensas u otros medios prácticos para asegurar y apo-
yar la pieza de trabajo en una plataforma estable. Sujetar las
piezas con la mano o contra su cuerpo es inestable y puede origi-
nar la pérdida de control.
•No fuerce la herramienta. Utilice la herramienta apropiada
según la aplicación. La herramienta apropiada hará el trabajo
mejor y de manera más segura bajo las especificaciones para las
que se diseñó.
•No utilice la herramienta si el interruptor no enciende ni apaga.
Cualquier herramienta que no pueda controlarse por medio de
interruptores antideslizantes peligrosa y debe repararse.
•Desconecte el enchufe de la toma de corriente antes de hacer
cualquier ajuste, cambio de accesorios o de guardar la herra-
mienta. Tales medidas preventivas de seguridad reducirán el ries-
go de que la herramienta se encienda accidentalmente.
•Guarde las herramientas fuera del alcance de los niños y de
otras personas no capacitadas. Las herramientas son peligrosas
en manos de personas no capacitadas.
•Cuide sus herramientas. Conserve las herramientas de corte afi-
ladas y limpias. Las herramientas que reciben un mantenimiento
adecuado, con piezas de corte afiladas, difícilmente se atascan y
son más fáciles de controlar.
•Verifique la alineación de las piezas móviles, busque fracturas
en las piezas demás condiciones que puedan afectar la opera-
ción de las herramientas. Si está dañada, lleve su herramienta a
servicio antes de usarla de nuevo. Muchos accidentes se deben a
herramientas con mantenimiento pobre.
•Solamente use accesorios que el fabricante recomiende para
su modelo de herramienta. Los accesorios que han sido diseña-
dos para utilizarse con cierto tipo de herramientas, pueden oca-
sionar peligro al emplearse con otras.
SERVICIO
•El servicio a las herramientas lo debe efectuar únicamente
personal calificado. El servicio o mantenimiento realizado por per-
sonal no calificado puede ocasionar el riesgo de lesiones persona-
les.
•Cuando efectúe servicio a una herramienta, utilice únicamente
refacciones idénticas. Siga las instrucciones de la sección de
mantenimiento de este manual. El uso de piezas no autorizadas o
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