OPERATOR'S MANUAL
MANUEL de L'UTILISATEUR
MANUAL del OPERADOR
Cat. No. / No de cat.
2880-20, 2881-20
M18 FUEL™ 4-1/2" / 5" BRAKING GRINDER
MEULEUSE À FREIN DE 115 mm / 125 mm (4-1/2" / 5") M18 FUEL™
ESMERILADORA CON FRENO DE 115 mm / 125 mm (4-1/2" / 5")
M18 FUEL™
WARNING To reduce the risk of injury, user must read and understand operator's manual.
AVERTISSEMENT An de réduire le risque de blessures, l'utilisateur doit lire et bien
comprendre le manuel.
ADVERTENCIA Para reducir el riesgo de lesiones, el usuario debe leer y entender el manual.
GENERAL POWER TOOL
WARNING
SAFETY WARNINGS
Read all safety warnings, instruc-
tions provided with this power tool. Failure to
follow all instructions listed below may result in
electric shock, re 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-oper-
ated (cordless) power tool.
tions, illustrations and specica-
WORK AREA SAFETY
• Keep work area clean and well lit. Cluttered or
dark areas invite accidents.
• Do not operate power tools in explosive atmo-
spheres, such as in the presence of ammable
liquids, gases or dust. Power tools create sparks
which may ignite the dust or fumes.
• Keep children and bystanders away while operating a power tool. Distractions can cause you to
lose control.
ELECTRICAL SAFETY
• 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. Unmodied plugs and matching outlets will
reduce risk of electric shock.
• 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.
• Do not 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 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.
• 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.
• If operating a power tool in a damp location is
unavoidable, use a ground fault circuit interrupter (GFCI) protected supply. Use of an GFCI
reduces the risk of electric shock.
PERSONAL SAFETY
• 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 inuence of drugs, alcohol or medication. A
moment of inattention while operating power tools
may result in serious personal injury.
• Use personal protective equipment. Always
wear eye protection. Protective equipment such
as a dust mask, non-skid safety shoes, hard hat or
hearing protection used for appropriate conditions
will reduce personal injuries.
• Prevent unintentional starting. Ensure the switch
is in the o-position before connecting to power
source and/or battery pack, picking up or carry-
ing the tool. Carrying power tools with your nger
on the switch or energizing power tools that have
the switch on invites accidents.
• 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.
• Do not overreach. Keep proper footing and balance at all times. This enables better control of the
power tool in unexpected situations.
• Dress properly. Do not wear loose clothing or
jewelry. Keep your hair and clothing away from
moving parts. Loose clothes, jewelry or long hair
can be caught in moving parts.
• 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.
• Do not let familiarity gained from frequent use
of tools allow you to become complacent and
ignore tool safety principles. A careless action can
cause severe injury within a fraction of a second.
POWER TOOL USE AND CARE
• 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.
• Do not use the power tool if the switch does not
turn it on and o. Any power tool that cannot be
controlled with the switch is dangerous and must be
repaired.
• Disconnect the plug from the power source and/
or remove the battery pack, if detachable, from
the power tool before making any adjustments,
changing accessories, or storing power tools.
Such preventive safety measures reduce the risk of
starting the power tool accidentally.
• 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.
• Maintain power tools and accessories. Check for
misalignment or binding of moving parts, breakage of parts and any other condition that may
aect the power tool’s operation. If damaged,
have the power tool repaired before use. Many
accidents are caused by poorly maintained power
tools.
• Keep cutting tools sharp and clean. Properly
maintained cutting tools with sharp cutting edges
are less likely to bind and are easier to control.
• 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 dierent from those intended could result
in a hazardous situation.
• Keep handles and grasping surfaces dry, clean
and free from oil and grease. Slippery handles
and grasping surfaces do not allow for safe handling
and control of the tool in unexpected situations.
BATTERY TOOL USE AND CARE
• Recharge only with the charger specied by the
manufacturer. A charger that is suitable for one type
of battery pack may create a risk of re when used
with another battery pack.
• Use power tools only with specically designated battery packs. Use of any other battery
packs may create a risk of injury and re.
• 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
2
to another. Shorting the battery terminals together
may cause burns or a re.
• Under abusive conditions, liquid may be ejected
from the battery; avoid contact. If contact accidentally occurs, ush with water. If liquid con-
tacts eyes, additionally seek medical help. Liquid
ejected from the battery may cause irritation or burns.
• Do not use a battery pack or tool that is damaged or modied. Damaged or modied batteries
may exhibit unpredictable behavior resulting in re,
explosion or risk of injury.
• Do not expose a battery pack or tool to re or
excessive temperature. Exposure to re or temperature above 265°F (130°C) may cause explosion.
• Follow all charging instructions and do not
charge the battery pack or tool outside the
temperature range specied in the instructions.
Charging improperly or at temperatures outside
the specied range may damage the battery and
increase the risk of re.
SERVICE
• Have your power tool serviced by a qualied
repair person using only identical replacement
parts. This will ensure that the safety of the power
tool is maintained.
• Never service damaged battery packs. Service
of battery packs should only be performed by the
manufacturer or authorized service providers.
SPECIFIC SAFETY RULES FOR
GRINDERS
Safety Warnings Common for Grinding, Sanding,
Wire Brushing or Cutting-O Operations:
• This power tool is intended to function as a
grinder, sander, wire brush, hole cutter or cuto tool. Read all safety warnings, instructions,
illustrations and specications provided with
this power tool. Failure to follow all instructions
listed below may result in electric shock, re and/or
serious injury.
• Operations such as polishing are not to be
performed with this power tool. Operations for
which the power tool was not designed may create
a hazard and cause personal injury.
• Do not convert this power tool to operate in a
way which is not speccally designed and specied by the tool manufacturer. Such a conversion
may result in a loss of control and cause serious
personal injury.
• Do not use accessories which are not spe-
cifically designed and specified by the tool
manufacturer. Just because the accessory can be
attached to your power tool, it does not assure safe
operation.
• 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 y apart.
• The outside diameter and the thickness of your
accessory must be within the capacity rating
of your power tool. Incorrectly sized accessories
cannot be adequately guarded or controlled.
• The dimensions of the accessory mounting must
t the dimensions of the mounting hardware of
the power tool. 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.
• Do not use a damaged accessory. Before each
use inspect the accessory such as abrasive
wheels for chips and cracks, backing pad for
cracks, tear or excess wear, wire brush for
loose or cracked wires. If power tool or accessory is dropped, inspect for damage or install
an undamaged accessory. After inspecting and
installing an accessory, position yourself and
bystanders away from the plane of the rotating
accessory and run the power tool at maximum
no-load speed for one minute. Damaged acces-
sories will normally break apart during this test time.
• 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 ying debris generated by various applications. The dust mask or respirator must be capable
of ltrating particles generated by the particular
application. Prolonged exposure to high intensity
noise may cause hearing loss.
• 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 y away
and cause injury beyond immediate area of operation.
• Hold the power tool by insulated gripping sur-
faces 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.
• Never lay the power tool down until the acces-
sory has come to a complete stop. The spinning
accessory may grab the surface and pull the power
tool out of your control.
• Do not run the power tool while carrying it at
your side. Accidental contact with the spinning
accessory could snag your clothing, pulling the ac-
cessory into your body.
• 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.
• Do not operate the power tool near ammable
materials. Sparks could ignite these materials.
• Do not use accessories that require liquid cool-
ants. Using water or other liquid coolants may result
in electrocution or shock.
Kickback and Related Warnings
Kickback is a sudden reaction to a pinched or
snagged rotating wheel, backing pad, brush or
any other accessory. Pinching or snagging causes
rapid stalling of the rotating accessory which in turn
causes the uncontrolled power tool to be forced in
the direction opposite of the accessory’s rotation at
the point of the binding.
For example, if an abrasive wheel is snagged or
pinched by the workpiece, the edge of the wheel that
is entering into the pinch point can dig into the surface
of the material causing the wheel to climb out or kick
out. The wheel may either jump toward or away from
the operator, depending on direction of the wheel’s
movement at the point of pinching. Abrasive wheels
may also break under these conditions.
Kickback is the result of power tool misuse and/or
incorrect operating procedures or conditions and
can be avoided by taking proper precautions as
given below.
3
WARNING
WARNING
• Maintain a rm grip on the power tool and posi-
tion your body and arms 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 reactions or kickback forces, if
proper precautions are taken.
• Never place your hand near the rotating acces-
sory. Accessory may kickback over your hand.
• 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.
• 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.
• Do not attach a saw chain woodcarving blade,
segmented diamond wheel with a peripheral gap
greater than 10 mm or toothed saw blade. Such
blades create frequent kickback and loss of control.
Safety Warnings Specific for Grinding and
Cutting-O Operations:
• Use only wheel types that are specied for your
power tool and the specic guard designed
for the selected wheel. Wheels for which the
power tool was not designed cannot be adequately
guarded and are unsafe.
• 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 ad-
equately protected.
• 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 opera-
tor from broken wheel fragments, accidental contact
with wheel and sparks that could ignite clothing.
• Wheels must be used only for specied applica-
tions. For example: do not grind with the side of
cut-o wheel. Abrasive cut-o wheels are intended
for peripheral grinding, side forces applied to these
wheels may cause them to shatter.
• Always use undamaged wheel anges that are of
correct size and shape for your selected wheel.
Proper wheel anges support the wheel thus reducing the possibility of wheel breakage. Flanges for
cut-o wheels may be dierent from grinding wheel
anges.
• Do not use worn down wheels from larger power
tools. A wheel intended for larger power tool is not
suitable for the higher speed of a smaller tool and
may burst.
• When using dual purpose wheels always use
the correct guard for the application being performed. Failure to use the correct guard may not
provide the desired level of guarding, which could
lead to serious injury.
Additional Safety Warnings Specic for CuttingO Operations:
• Do not “jam” the cut-o wheel or apply ex-
cessive 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.
• Do not position your body in line with and behind
the rotating wheel. When the wheel, at the point
of operation, is moving away from your body, the
possible kickback may propel the spinning wheel
and the power tool directly at you.
• When wheel is binding or when interrupting a
cut for any reason, switch o the power tool
and hold it motionless until the wheel comes
to a complete stop. Never attempt to remove
the cut-o 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.
• 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.
• Support panels or any oversized workpiece to
minimize the risk of wheel pinching and kick-
back. 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.
• 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.
• Do not attempt to do curved cutting. Overstress-
ing 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, which
can lead to serious injury.
Safety Warnings Specic for Sanding Operations:
• Use proper sized sanding disc paper. Follow
manufacturers recommendations, when selecting sanding paper. Larger sanding paper extend-
ing 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:
• 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.
• 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 load
and centrifugal forces.
Additional Safety Warnings
•
appropriate respiratory protection or use an
OSHA compliant dust extraction solution.
• Always operate with two hands.
• Always use common sense and be cautious when
using tools. It is not possible to anticipate every
situation that could result in a dangerous outcome.
Do not use this tool if you do not understand these
operating instructions or you feel the work is beyond
your capability; contact Milwaukee Tool or a trained
professional for additional information or training.
• Maintain labels and nameplates. These carry
important information. If unreadable or missing,
contact a MILWAUKEE service facility for a free
replacement.
•
construction activities contains chemicals known to
4
To reduce the risk of injury, when
working in dusty situations, wear
Some dust created by power sanding,
sawing, grinding, drilling, and other
cause cancer, birth defects or other reproductive
C
US
WARNING
WARNING
WARNING
harm. Some examples of these chemicals are:
• lead from lead-based paint
• crystalline silica from bricks and cement and other
masonry products, and
• arsenic and chromium from chemically-treated
lumber.
Your risk from these exposures varies, depending
on how often you do this type of work. To reduce
your exposure to these chemicals: work in a well
ventilated area, and work with approved safety
equipment, such as those dust masks that are spe-
cially designed to lter out microscopic particles.
SYMBOLOGY
Volts
Direct Current
Do not use the guard for cut-o
operations
Rated Revolutions per Minute (RPM)
RAPIDSTOP™ Electric Braking
UL Listing Mark for Canada and the U.S.
FUNCTIONAL DESCRIPTION
Cat. No. 2880-20
1
3
2
4
5
6
ASSEMBLY
Recharge only with the charger
cic charging instructions, read the operator’s
manual supplied with your charger and battery.
To remove the battery, push in the release buttons
and pull the battery pack away from the tool.
To insert the battery, slide the pack into the body
of the tool. Make sure it latches securely into place.
stalled guards. The guard type must match the
wheel type to provide maximum protection for
the operator if the wheel should break.
This tool is shipped with a guard. Always use a guard
unless otherwise indicated by these instructions.
1. To remove the guard. WARNING! Remove the bat-
tery pack and remove any accessories from
2. Press in the guard lock lever and rotate the guard to line
up the tabs on the grinder with the slots in the guard.
3. Press in the lock lever and lift the guard straight up
and away from the tool.
specied for the battery. For spe-
Removing/Inserting the Battery
Always remove the battery pack
any time the tool is not in use
To reduce the risk of injury when
grinding, always use properly in-
Removing/Installing/Adjusting
the Type 27 Guard
.
spindle.
9
8
7
Cat. No.
2881-20
5
10
1. Spindle lock
2. Handle
3. Dust screen
4. Switch lock-o (2880-20)
5. Paddle switch (2880-20)
Slide switch (2881-20)
6. Side handle
7. Type 27 guard
8. Accessory
9. Guard lock lever
10. Type 1 clip-on
guard
SPECIFICATIONS
Cat. No. ...................................... 2880-20, 2881-20
Volts .............................................................. 18 DC
Battery Type .................................................M18™
Charger Type ................................................M18™
Rated RPM .....................................................8 500
Spindle Thread Size ....................................5/8"-11
Max Capacity ............................................... 5"x1/4"
Recommended Ambient
Operating Temperature .................... 0°F to 125°F
2
4. To install the guard, remove the battery pack and
remove any accessories from the spindle.
NOTE: Use only 4-1/2" grinding wheels with 4-1/2"
guards (available as an accessory). Use only 5"
grinding wheels with 5" guards.
5. Line up the tabs on the grinder with the slots in
the guard.
6. Press in the guard lock lever and press the guard
onto the tool.
7. To adjust the guard, press in the guard lock lever
and rotate the guard to one of ve detent slots.
WARNING! Always adjust the guard to provide the
operator with maximum protection while operating.
Operator's Zones
5
Installing/Removing the Type 1
WARNING
WARNING
WARNING
When using a Type 1 wheel, always use the Type 1
clip-on guard.
1. Remove the battery pack. WARNING! Always
remove battery pack before changing or removing
accessories.
2. Properly install the Type 27 guard according to the
instructions, and adjust it properly to provide the
operator with maximum protection while operating.
3. To install the Type 1 clip-on guard, slide the Type 1
clip-on guard over the Type 27 guard until it clips
into place.
4. To remove, remove the battery pack and then
separate the Type 1 clip-on guard from the Type
27 guard.
tool. Hold securely.
The side handle may be installed on either side of
the gear case. Position the side handle in the location which oers best control and guard protection.
To install, thread side handle into side handle socket
and tighten securely.
the use, care and protection of grinding wheels.
Use grinding wheels, and accessories that are:
• correct size as written on tool’s nameplate.
• rated at or above the RPM listed on the tool’s name-
plate.
• correct accessory, wheel type and grit for the job.
Grinding is the cutting action of thousands of abrasive
grains on the face of a grinding wheel. When grinding
metals such as steel and iron, choose an aluminum
oxide grinding wheel. Select a silicon carbide grinding
wheel for stone and concrete. Use cotton reinforced
wheels for non-ferrous metals.
Type 1 reinforced 1/8" thick or less Cut-O Wheels
are suited for small cut-o and shallow notching
operations only. Always handle wheels carefully to
avoid damage. Before installing any wheel, always
inspect it for cracks. If wheel is cracked, discard it to
prevent others from using it.
Care of Grinding & Cut-O Wheels
Grinding/cut-o wheels should be protected from:
• wetness and extreme humidity
• any type of solvent
• extreme changes in temperature
• dropping and bumping
Grinding and cut-o wheels should be stored:
• in an organized way so wheels can be removed
without disturbing or damaging other wheels
• with their safety information
Clip-on Guard
To reduce the risk of injury, always
use a side handle when using this
Installing Side Handle
To reduce the risk of injury, the
operator should be instructed in
Grinding Wheel Selection
Grinding and cut-o wheels should NOT be dropped,
rolled or bumped.
Discard wheels that have been dropped, rolled,
bumped, subjected to extreme changes in temperature, or come into contact with solvents or wetness.
at least equal to the maximum speed marked on
the power tool. This speed is based on the
strength of the wheel, allowing for a reasonable
measure of safety. It is not meant to imply a best
or most ecient operating speed. Do not exceed
the Maximum Safe Operating Speed.
Installing/Removing Grinding Wheels
Make sure the wheel does not extend beyond the
bottom of the guard. Threaded hub grinding wheels
may require a deeper guard (see "Accessories").
1. Remove the battery pack. WARNING! Always
remove battery pack before changing or removing
accessories.
2. Properly position the guard.
3. Wipe the ange, ange nut and spindle to remove
dust and debris. Inspect the parts for damage. Replace if needed. Use only MILWAUKEE mounting
hardware designed for your tool.
4. Place the ange on spindle, as shown.
5. Place the selected wheel on the spindle and align
it with the ange.
6. Position the ange nut over the spindle according
to wheel thickness.
Flange nut
position for
1/8" thick or less wheels
Flange nut
position for
1/4" thick or more wheels
7. Press in the spindle lock button while turning the
ange nut clockwise. Tighten securely.
8. To remove wheel, remove the battery pack and
reverse the procedure.
6
Only use accessories with Maximum Safe Operating Speed rated
Flange nut
Wheel
Flange
Spindle
1/8"
1/4"
Use sanding discs and accessories that are:
WARNING
WARNING
• correct size as written on tool’s nameplate.
• rated at or above the RPM listed on the tool’s name-
plate.
• correct accessory, wheel type and grit for the job.
Select the correct type of sanding disc for your job.
Generally, use 24 or 36 grit for heavy stock removal;
50, 60, or 80 grit for medium stock removal and 120
grit for nishing. Always begin with a coarse grit, using successively ner grits to obtain the desired nish.
•Aluminum Oxide: For fast cutting, general purpose
discs for most metal jobs. Best for cold-rolled steel,
stainless steel or metals requiring tough, fast cutting,
long lasting abrasives.
•Aluminum Zirconia Bi-Cut: Unique grit pattern is
arranged in clusters for faster stock removal and
cleaning. Ideal for removing paint from cars, boats,
etc. without clogging.
•Ceramic: Lasts up to 3 times longer than Aluminum
Oxide Discs. For general metal working. Ideal for
tough jobs.
Sanding Disc Selection
Installing Backing Pad and Sanding Discs
1. Remove the battery pack. WARNING! Always
remove battery pack before changing or removing
accessories.
2. Wipe the accessories, disc nut, and spindle to
remove dust and debris. Inspect the parts for damage. Replace if needed. Use only MILWAUKEE
mounting hardware designed for your tool.
3. Slip backing pad onto spindle with at side away
from gear case.
4. Place sanding disc on backing pad and secure
assembly to spindle with disc nut.
Disc nut
Sanding disc
Backing pad
Spindle
5. Press in the spindle lock button while turning ange
nut clockwise. Tighten securely.
6. To remove backing pad and sanding disc, remove
the battery pack and reverse the procedure.
Installing/Removing/Cleaning
Using the dust screen will increase the performance
and extend the life of the tool.
1. To attach the dust screen, snap the screen over
the tool’s handle.
2. To remove the dust screen, insert a at screw-
driver into the notch at the top of the dust screen
and pry away from the tool.
3. To clean the dust screen, tap against a hard sur-
face, or blow clean with compressed air.
the Dust Screen
OPERATION
To reduce the risk of injury, always
to comply with ANSI Z87.1.
When working in dusty situations, wear appro-
priate respiratory protection or use an OSHA
compliant dust extraction solution.
Never grind without proper safety equipment.
The controlled start feature reduces the torque reac-
tion "jerk" when the trigger is pulled.
The electric brake engages when the switch is re-
leased, causing the wheel to stop within seconds.
There may be a delay between the time the switch is
released and when the brake engages. Occasionally
the brake may miss completely. If the brake misses
frequently, have the tool serviced by an authorized
MILWAUKEE service facility. Make sure the tool
comes to a complete stop before laying it down.
provided before and during grinding.
To start the tool, grasp the handle and side handle
rmly. Push the lock-o button forward and squeeze
the paddle switch.
To stop the tool, release the paddle switch. Make
sure the tool comes to a complete stop before laying
down the tool.
To start the tool, grasp the handle and side handle
rmly and slide the switch to ON.
To stop the tool, release the switch. Make sure the tool
comes to a complete stop before laying down the tool.
To lock-on the switch, slide the switch to ON and
press down on the front of the switch. To stop the
tool, press and release the switch. Make sure the tool
comes to a complete stop before laying down the tool.
1. If you have just installed an accessory or are be-
ginning a period of work, test the wheel by letting it
spin for one minute before applying it to the work-
piece. WARNING! Never use a accessory that has
been dropped. Out-of-balance or damaged acces-
sories can mar workpiece, damage the tool, and
cause stress that may cause accessory failure.
2. Use a clamp, vise or other practical means to hold
the workpiece, freeing both hands to control the
tool.
3. WARNING! Hold tool securely with both hands.
Start the tool.
NOTE: If the battery is inserted when the tool is
ON, the tool will not run. Turn the tool OFF, then
back ON to begin work.
4. Allow accessory to come to full speed before
beginning work.
5. Control pressure and surface contact between accessory and workpiece. WARNING! Never bang
accessory onto work.Too much pressure causes
accessory failure or slows speed.
6. When nished, turn o the tool and make sure it
comes to a complete stop before laying it down.
7
wear proper eye protection marked
Controlled Start
(Models with RAPIDSTOP™)
Electric Brake
Always hold the tool rmly with
both hands using the handles
Paddle Switch Operation
Slide Switch Operation
(2880-20)
(2881-20)
General Operation
Using Grinding Wheels
WARNING
WARNING
WARNING
The guard type must match the
protection for the operator if the wheel should
break.
When grinding, hold tool at a 5⁰ to 15⁰ angle, using
constant pressure for a uniform nish. Too great an
angle causes concentrated pressure on small areas
which may gouge or burn work surface.
wheel type to provide maximum
Hold at a
5° to 15° angle
For best result use only this portion of disc
Using Cut-O Wheels
Cut-O Wheels are suited for small cut-o and shallow notching operations only.
protection for the operator if the wheel should
break.
When using a cut-o wheel, hold the tool as shown,
using only the edge of the wheel. WARNING! Using
the face of a Cut-O Wheel (as in grinding) will cause
the Wheel to crack and break, resulting in serious
personal injury.
The guard type must match the
wheel type to provide maximum
Wire Wheel Brush
Type 27 Guard
Wire Cup Brush
Test wheel for balance and loose or damaged wires
by letting it spin for one minute before applying it to
the workpiece. During this time, no one should stand
in front of or in line with it.
Control pressure and surface contact between
wheel and workpiece. Too much pressure causes
over-bending of wires and heat build-up causing
premature wire breaking, rapid dulling and reduced
brush life. Instead of more pressure, try a wire wheel
with more aggressive cutting action (increased wire
size, decreased wire length or dierent brush type
(knot type vs. crimped wire type).
Hold tool at 5⁰ to 15⁰ angle to ensure proper sanding
pressure and control. Too great an angle will result
in too much pressure and could cause excessive
wear to the disc and workpiece. Too small an angle
will reduce control.
Use long, sweeping, side to side strokes, advancing
forward to produce the desired nish.
Using Sanding Discs
Wire brushes are useful for removing rust, scale,
burrs, weld slag, etc.
goggles or face shields. Fatigued wires and
residue will y o the brush with considerable
force, causing potential for serious injury.
Never exceed Maximum Safe Operating Speed of
brush. Do not use a damaged brush or one that
is functioning improperly (throwing wires, out-
of-balance, etc.). These conditions increase the
possibility of further brush failure and possible
injury. Discard and replace damaged brushes
immediately.
A "Type 27" guard must be installed when using
a wire wheel brush to provide maximum protection for the operator when fatigued wires break.
(See "Removing/Installing/Adjusting the guard".)
Always install wire brushes according to the acces-
sory manufacturer’s instructions. Only use accessories with threads matching the tool spindle.
Using Wire Brushes
Everyone in the area must wear
protective clothing and safety
Hold at a
5° to 15° angle
For best result use only this portion of disc
Cross Sanding - When nishing a surface that
has been prepared by a coarse disc or wheel, sand
at right angles to the strokes made by the coarser
disc. Finishing marks left from previous sanding are
easily seen and removed for a uniform nish. Failure
to cross sand when changing from a coarse disc to
a nishing disc may result in deep scratches and
circular marks.
Removing Welds or Hammer Marks - When removing welds or hammer marks, limit coarse sanding to
the immediate area. Use successively ner grits to
smooth surface.
8
Finishing Metal - Constantly move across the sur-
WARNING
WARNING
WARNING
face. Work faster on curved surfaces where contact
areas are smaller and pressure is greater. Flat areas
may appear at the end of the stroke when pressure
is too heavy. Ease up on pressure at end of each
stroke and when reversing strokes.
Deep scratches and circular marks can result from:
• Using too coarse a grit
• Using a partially glazed disc
• Dirt or loose metal on the workpiece
• Failure to sand across the grain when changing from
coarse to nishing discs
• Failure to use closed coated discs to reduce the
problem of grains working loose and scratching the
workpiece
Bluish discoloration of metal surface indicates:
• Excessive heat caused by circular motion in a small area
• Excessive pressure
• Use of worn out or glazed discs
Troubleshooting
MAINTENANCE
To reduce the risk of injury, always
unplug the charger and remove the
battery pack from the charger or tool before
performing any maintenance. Never disassemble
the tool, battery pack or charger. Contact a
MILWAUKEE service facility for ALL repairs.
Keep your tool, battery pack and charger in good
repair by adopting a regular maintenance program.
Inspect your tool for issues such as undue noise,
misalignment or binding of moving parts, breakage of
parts, or any other condition that may aect the tool
operation. Return the tool, battery pack, and charger
to a MILWAUKEE service facility for repair. After six
months to one year, depending on use, return the
tool, battery pack and charger to a MILWAUKEE
service facility for inspection.
If the tool does not start or operate at full power with
a fully charged battery pack, clean the contacts on
the battery pack. If the tool still does not work properly, return the tool, charger and battery pack, to a
MILWAUKEE service facility for repairs.
Maintaining Tool
To reduce the risk of personal injury and damage, never immerse
your tool, battery pack or charger in liquid or
allow a liquid to ow inside them.
Clean dust and debris from any vents. Keep tool
clean, dry and free of oil or grease. Use only mild
soap and a damp cloth to clean, since certain cleaning agents and solvents are harmful to plastics and
other insulated parts. Some of these include gasoline,
turpentine, lacquer thinner, paint thinner, chlorinated
cleaning solvents, ammonia and household deter-
gents containing ammonia. Never use ammable or
combustible solvents around tools.
For repairs, return the tool, battery pack and charger
to the nearest authorized service center.
Cleaning
Repairs
ACCESSORIES
Use only recommended accesso-
For a complete listing of accessories, go online to
www.milwaukeetool.com or contact a distributor.
ries. Others may be hazardous.
SERVICE - UNITED STATES
1-800-SAWDUST (1.800.729.3878)
Monday-Friday, 7:00 AM - 6:30 PM CST
or visit www.milwaukeetool.com
Contact Corporate After Sales Service Technical
Support with technical, service/repair, or warranty
questions.
Email: metproductsupport@milwaukeetool.com
Become a Heavy Duty Club Member at
www.milwaukeetool.com to receive important
notications regarding your tool purchases.
SERVICE - CANADA
Milwaukee Tool (Canada) Ltd
Monday-Friday, 7:00 AM - 4:30 PM CST
Every MILWAUKEE power tool* (see exceptions below) is warranted
to the original purchaser only to be free from defects in material and
workmanship. Subject to certain exceptions, MILWAUKEE will repair
or replace any part on an electric power tool which, after examination,
is determined by MILWAUKEE to be defective in material or workman-
ship for a period of ve (5) years** after the date of purchase unless
otherwise noted. Return of the power tool to a MILWAUKEE factory
Service Center location or MILWAUKEE Authorized Service Station,
freight prepaid and insured, is required. A copy of the proof of purchase
should be included with the return product. This warranty does not
apply to damage that MILWAUKEE determines to be from repairs
made or attempted by anyone other than MILWAUKEE authorized
personnel, misuse, alterations, abuse, normal wear and tear, lack of
maintenance, or accidents.
Normal Wear: Many power tools need periodic parts replacement and
service to achieve best performance. This warranty does not cover
repair when normal use has exhausted the life of a part including,
but not limited to, chucks, brushes, cords, saw shoes, blade clamps,
o-rings, seals, bumpers, driver blades, pistons, strikers, lifters, and
bumper cover washers.
*This warranty does not cover Air Nailers & Staplers; Airless Paint
Sprayer; Cordless Battery Packs; Gasoline Driven Portable Power Gen-
erators; Hand Tools; Hoist – Electric, Lever & Hand Chain; M12™ Heated Gear; Reconditioned Product; and Test & Measurement Products.
There are separate and distinct warranties available for these products.
**The warranty period for Job Site Radios, M12™ Power Port, M18™
Power Source, Jobsite Fan and Trade Titan™ Industrial Work Carts
is one (1) year from the date of purchase. The warranty period for
the M18 FUEL™ 1" D-Handle High Torque Impact Wrenches, Drain
Cleaning Cables, AIRSNAKE™ Drain Cleaning Air Gun Accessories,
REDLITHIUM™ USB Laser Levels, TRAPSNAKE™ 25' Auger w/
CABLE DRIVE™, FORCE LOGIC™ Press Tool Accessories and Green
Cross Line Laser is two (2) years from the date of purchase. The warranty period for the M18™ Compact Heat Gun, 8 Gallon Dust Extractor, M18™ Framing Nailers, M18 FUEL™ 1/2" Ext. Anvil Controlled
Torque Impact Wrench w/ ONE-KEY™, M18 FUEL™ 1" High Torque
Impact Wrench w/ ONE-KEY™, M18 FUEL™ 2 Gal. Compact Quiet
Compressor, M12™ Laser Levels, 165' Laser Detector, M12™ 23GA
Pin Nailer, M18 FUEL™ 1/4" Blind Rivet Tool w/ ONE-KEY™, M12
FUEL™ Low Speed Tire Buer, M18 FUEL™ Random Orbital Polishers, M18™ Utility Fencing Stapler, and the 72" Laser Tripod is three (3)
years from the date of purchase. The warranty period for the LED in the
LED Work Light and the LED Upgrade Bulb for the Work Light is the
lifetime of the product subject to the limitations above. If during normal
use the LED or LED Bulb fails, the part will be replaced free of charge.
Warranty Registration is not necessary to obtain the applicable war-
ranty on a MILWAUKEE power tool product. The manufacturing date
of the product will be used to determine the warranty period if no proof
of purchase is provided at the time warranty service is requested.
ACCEPTANCE OF THE EXCLUSIVE REPAIR AND REPLACEMENT
REMEDIES DESCRIBED HEREIN IS A CONDITION OF THE CONTRACT FOR THE PURCHASE OF EVERY MILWAUKEE PRODUCT.
IF YOU DO NOT AGREE TO THIS CONDITION, YOU SHOULD NOT
PURCHASE THE PRODUCT. IN NO EVENT SHALL MILWAUKEE
BE LIABLE FOR ANY INCIDENTAL, SPECIAL, CONSEQUENTIAL
OR PUNITIVE DAMAGES, OR FOR ANY COSTS, ATTORNEY FEES,
EXPENSES, LOSSES OR DELAYS ALLEGED TO BE AS A CONSEQUENCE OF ANY DAMAGE TO, FAILURE OF, OR DEFECT IN ANY
PRODUCT INCLUDING, BUT NOT LIMITED TO, ANY CLAIMS FOR
LOSS OF PROFITS. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL
DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT
APPLY TO YOU. THIS WARRANTY IS EXCLUSIVE AND IN LIEU
OF ALL OTHER EXPRESS WARRANTIES, WRITTEN OR ORAL.
9
1.800.268.4015
or visit www.milwaukeetool.ca
LIMITED WARRANTY
USA & CANADA
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