4
5
back 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 snag-
ging 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
or toothed saw blade.
Such blades create fre-
quent kickback and loss of control.
Safety Warnings Specifi c for Grinding and
Abrasive Cutting-Off Operations:
•
Use only wheel types that are recommended
for your power tool and the specifi c guard
designed for the selected wheel.
Wheels for
which the power tool was not designed cannot
be adequately guarded and are unsafe.
•
The guard must be securely attached to the
power tool and positioned for maximum safe-
ty, so the least amount of wheel is exposed
towards the operator.
The guard helps to pro-
tect operator from broken wheel fragments and
accidental contact with wheel.
•
Wheels must be used only for recommend-
ed 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.
•
Always use undamaged wheel fl anges that
are of correct size and shape for your se-
lected wheel.
Proper wheel fl anges support
the wheel thus reducing the possibility of wheel
breakage. Flanges for cut-off wheels may be dif-
ferent from grinding wheel fl anges.
•
Do not use worn down wheels from larger
power tools.
Wheel intended for larger power
tool is not suitable for the higher speed of a
smaller tool and may burst.
Additional Safety Warnings Specifi c for Abra-
sive Cutting-Off Operations:
•
Do not
“
jam
”
the cut-off wheel or apply exces-
sive pressure. Do not attempt to make an ex-
cessive depth of cut.
Overstressing the wheel
increases the loading and susceptibility to twist-
ing or binding of the wheel in the cut and the pos-
sibility 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 spin-
ning wheel and the power tool directly at you.
•
When wheel is binding or when interrupting a
cut for any reason, switch off the power tool
and hold the power tool motionless until the
wheel comes to a complete stop. Never at-
tempt to remove the cut-off wheel from the cut
while the wheel is in motion otherwise kick-
back 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 reenter 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, elec-
trical wiring or objects that can cause kickback.
Safety Warnings Specifi c for Sanding Opera-
tions:
•
Do not use excessively oversized sanding
disc paper. Follow manufacturers recommen-
dations, when selecting sanding paper.
Larger
sanding paper extending beyond the sanding
pad presents a laceration hazard and may cause
snagging, tearing of the disc or kickback.
Safety Warnings Specifi c 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
•
Maintain labels and nameplates.
These carry
important information. If unreadable or missing,
contact a
MILWAUKEE
service facility for a free
replacement.
•
WARNING:
Some dust created by power sand-
ing, sawing, grinding, drilling, and other construc-
tion activities contains chemicals known to cause
cancer, birth defects or other reproductive 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, depend-
ing on how often you do this type of work. To re-
duce 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 fi lter out microscopic
particles.
SYMBOLOGY
Volts
Direct Current
Rated Revolutions per Minute
(RPM)
Underwriters Laboratories, Inc.
United States and Canada
Cat. No. 2781-20
FUNCTIONAL DESCRIPTION
ASSEMBLY
WARNING
Recharge only with the
charger specifi ed for the battery. For specifi c
charging instructions, read the operator’s
manual supplied with your charger and battery.
Inserting/Removing the 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.
1. Spindle lock
2. Dust guard
3. Switch lock-off
4. Paddle switch (2780-20)
Slide switch (2781-20)
WARNING
Always remove battery
pack before changing or removing accesso-
ries. Only use accessories specifi cally recom-
mended for this tool. Others may be hazardous.
Cat. No. 2780-20
1
4
5
4
3
6
7
Installing Side Handle
The side handle may be installed on either side
of the gear case. Position the side handle in the
location which offers best control and guard protec-
tion. To install, thread side handle into side handle
socket and tighten securely.
WARNING
To reduce the risk of injury
when grinding:
• ALWAYS use the proper guard.
• ALWAYS properly install the guard.
• ALWAYS hold the tool fi rmly with both
hands using the handles provided before
and during grinding.
• NEVER use a wheel that has been dropped.
• NEVER bang grinding disc onto work.
• NEVER grind without proper safety
equipment.
Tab
slots
Installing, Removing and Adjusting the Guard
This tool is shipped with a guard. The guard must
be used when using the tool as a grinder. The guard
may be removed when using tool as a sander.
1. To
remove
the guard, remove the battery pack
and remove any accessories from spindle.
2. Press in the 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.
Fig. 1
Detent slots
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 lock lever and press the guard onto
the tool.
7. To
adjust
the guard, press in the lock lever and
rotate the guard to one of fi ve detent slots.
2
5. Side handle
6. Guard
7. Guard lock lever
WARNING
To reduce the risk of injury,
wear safety goggles or glasses with side shields.
Installing/Removing/Cleaning the Dust Screen
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 fl 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
surface, or blow clean with compressed air.
Cat.
No.
Volts
DC
Rated
RPM
Spindle
Thread
Size
Max
Wheel
Size
Switch
Type
2780-20
2781-20
18
18
8 500
8 500
5/8"-11
5/8"-11
5"
5"
Paddle
Slide
SPECIFICATIONS
