Panasonic EY4640X User manual

Cordless Angle Grinder
Meule d'angle sans fil
Amoladora angular inalámbrica
Operating Instructions
Instructions d'utilisation
Manual de instrucciones
Model No: EY4640
IMPORTANT
This manual contains safety information. Read manual completely before first using this product and save this
manual for future use.
IMPORTANT
Ce mode d’emploi contient des informations sur la sécurité. Lisez-le en entier avant d’utiliser le produit et
conservez-le pour référence.
IMPORTANTE
Este manual contiene información de seguridad. Lea completamente este manual antes de utilizar por primera
vez este producto, y guárdelo para poder consultarlo en el futuro.

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Index/Index/Indice
English: Page 4
Français: Page 22
Español: Página 42
FUNCTIONAL DESCRIPTION
DESCRIPTION DES FONCTIONS
DESCRIPCIÓN FUNCIONAL
Ni-MH
Ni-Cd
(A)
(B)
(P)
(M)
(N)
(O)
(L)
(J)
(I)
(H)
(G)
(C)
(D) (E) (F)
(Q)
(S)
(T)
(V)
(W)
(U)
(R)
(K)

- 3 -
(A) Power switch Interrupteur d’alimentation Interruptor de alimentación
(B) Brush cap Capuchon des charbons Tapa de cepillo
(C) Display panel Ecran d'affichage Panel de exhibición
(D) Battery low warning lamp
Témoin d’avertissement de batterie basse Luz de aviso de baja carga de batería
(E) On lock warning lamp
Témoin d'avertissement à verrou activé Luz de advertencia de bloqueo
(F) Overheat warning lamp
(battery) Témoin d’avertissement de surchauffe (batterie) Luz de advertencia de sobreca- lentamiento (batería)
(G) Battery pack (EY9L40) Batterie autonome (EY9L40) Batería (EY9L40)
(H) Alignment mark Marque d'alignement Marca de alineación
(I) Battery pack release button
Bouton de libération de batterie autonome Botón de liberación de batería
(J) Brush cap cover
Couvercle de capuchon des charbons Cubierta de tapa de cepillo
(K) Support handle Manche de support Mango de soporte
(L) Support handle mounting
hole Orifice de montage du manche de support Orificio de montaje de mango de soporte
(M) Grinding disc guard Carter de disque abrasif
Protección de disco de desbastado
(N) Grinding disc guard fixing
screw Vis de fixation du carter de disque abrasif Tornillo de fijación de protector de disco de amoladora
(O) Spindle Axe Eje
(P) Spindle lock button Bouton de blocage de l'axe Botón de bloqueo de eje
(Q) Li-ion battery pack dock Poste d’accueil de la batterie
autonome Li-ion Enchufe de carga de batería Li-ión
(R) Battery charger (EY0L80) Chargeur de batterie (EY0L80) Cargador de batería (EY0L80)
(S) NI-MH/Ni-Cd battery pack
dock Poste d’accueil de la batterie autonome Ni-MH/Ni-Cd Enchufe de carga de batería Ni-MH/Ni-Cd
(T) Battery pack cover
Couvercle de la batterie autonome Cubierta de la batería
(U) Clamp nut Écrou de serrage de collier Tuerca de abrazadera
(V) Disc flange Flasque du disque Brida de disco
(W) Disc wrench Clé de disque Llave de disco

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I. INTRODUCTION
Thank you for purchasing the Pana-
sonic Angle Grinder. The powerful
grinding action of this tool, combined
with the convenience of its recharge-
able battery pack, provides you with
great grinding performance.
This Angle Grinder is only to be used
for grinding and cutting-off.
DANGER:
This product is a grinding tool, de-
signed to grind. It has a rotating disc
which is capable of cutting you deep-
ly, causing serious injury or death. As
a result, please read this manual and
the cautionary markings on the tool
carefully, and obey all of the Safety
Instructions to avoid such injury.
WARNING:
To reduce the risk of injury, always
use proper guards when grinding.
How to Use This Manual
• Please read this manual completely
before starting to use your grinder. If
you let someone else use the grinder,
make sure they either read this man-
ual or are fully instructed in the prop-
er use and all safety precautions con-
cerning the grinder.
• Please keep this manual for future ref-
erence. It contains important safety in-
formation that you must follow to use
the grinder safely.
• This manual and product use the fol-
lowing signal words:
NOTE:
Notes provide additional informa-
tion that you should know about the
grinder.
CAUTION:
Caution indicates a potentially haz-
ardous situation, which could result
in minor or moderate injury if not
avoided. Cautions also alert you to
unsafe practices to be avoided.
WARNING:
Warning indicates a potentially haz-
ardous situation, which could result in
serious injury or death if not avoided.
DANGER:
Danger indicates an imminent haz-
ard which will result in serious injury
or death if not avoided.
II. GENERAL SAFETY
RULES
WARNING! Read all instructions
Failure to follow all instructions listed
below may result in electric shock, fire
and/or serious injury. The term “power
tool” in all of the warnings listed below
refers to your main operated (corded)
power tool and battery operated
(cordless) power tool.
SAVE THESE INSTRUCTIONS
Work Area Safety
1) Keep work area clean and well lit.
Cluttered or dark areas invite acci-
dents.
2) Do not operate power tools in
explosive atmospheres, such as
in the presence of flammable liq-
uids, gases or dust.
Power tools create sparks which
may ignite the dust or fumes.
3) Keep children and bystanders
away while operating a power
tool.
Distractions can cause you to lose
control.
Electrical Safety
1) Power tool plugs must match the
outlet. Never modify the plug in
any way. Do not use any adapt-
er plugs with earthed (grounded)
power tools.
Unmodified plugs and matching out-
lets will reduce risk of electric shock.
2) Avoid body contact with earthed
or grounded surfaces such as
pipes, radiators, ranges and re-
frigerators.

- 5 -
There is an increased risk of elec-
tric shock if your body is earthed or
grounded.
3) Do not expose power tools to
rain or wet conditions.
Water entering a power tool will in-
crease the risk of electric shock.
4) 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 in-
crease the risk of electric shock.
5) 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.
Personal Safety
1) Stay alert, watch what you are
doing and use common sense
when operating a power tool. Do
not use a power tool while you
are tired or under the influence
of drugs, alcohol or medication.
A moment of inattention while oper-
ating power tools may result in per-
sonal injury.
2) Use safety equipment. Always
wear eye protection.
Safety equipment such as dust
mask, non-skid safety shoes, hard
hat, or hearing protection used for
appropriate conditions will reduce
personal injuries.
3) Avoid accidental starting. En-
sure the switch is in the off posi-
tion before plugging in.
Carrying power tools with your fin-
ger on the switch or plugging in the
power tools that have the switch on
invites accidents.
4) 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.
5) Do not overreach. Keep proper
footing and balance at all times.
This enables better control of the
power tool in unexpected situa-
tions.
6) Dress properly. Do not wear
loose clothing or jewelry. Keep
your hair, clothing and gloves
away from moving parts.
Loose clothes, jewelry or long hair
can be caught in moving parts.
7) If devices are provided for the
connection of dust extraction
and collection facilities, ensure
these are connected and proper-
ly used.
Use of these devices can reduce
dust related hazards.
Power Tool Use and Care
1) 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.
2) Do not use the power tool if the
switch does not turn it on and
off.
Any power tool that cannot be con-
trolled with the switch is dangerous
and must be repaired.
3) Disconnect the plug from the
power source and/or the battery
pack from the power tool before
making any adjustments, chang-
ing accessories, or storing pow-
er tools.
Such preventive safety measures
reduce the risk of starting the pow-
er tool accidentally.
4) Store idle power tools out of the
reach of children and do not al-
low persons unfamiliar with the
power tool or these instructions
to operate the power tool.
Power tools are dangerous in the
hands of untrained users.
5) Maintain power tools. Check for
misalignment or binding of mov-
ing parts, breakage of parts and
any other condition that may af-

- 6 -
fect the power tools operation.
If damaged, have the power tool
repaired before use.
Many accidents are caused by
poorly maintained power tools.
6) Keep cutting tools sharp and
clean.
Properly maintained cutting tools
with sharp cutting edges are less
likely to bind and are easier to con-
trol.
7) Use the power tool, accessories
and tool bits etc. in accordance
with these instructions and in
the manner intended for the par-
ticular type of power tool, taking
into account the working con-
ditions and the work to be per-
formed.
Use of the power tool for opera-
tions different from those intended
could result in a hazardous situa-
tion.
Battery Tool Use and Care
1) Ensure the switch is in the off
position before inserting battery
pack.
Inserting battery pack into pow-
er tools that have the switch on in-
vites accidents.
2) Recharge only with the charger
specified by the manufacturer.
A charger that is suitable for one
type of battery pack may create a
risk of fire when used with another
battery pack.
3) Use power tools only with spe-
cifically designated battery
packs.
Use of any other battery packs may
create a risk of injury and fire.
4) When battery pack is not in use,
keep it away from other metal
objects like paper clips, coins,
keys, nails, screws, or oth-
er small metal objects that can
make a connection from one ter-
minal to another.
Shorting the battery terminals to-
gether may cause burns, or a fire.
5) Under abusive conditions, liq-
uid may be ejected from battery;
avoid contact. If contact acci-
dentally occurs, flush with wa-
ter. If liquid contacts eyes, addi-
tionally seek medical help.
Liquid ejected from the battery may
cause irritation or burns.
Service
1) Have your power tool serviced by
a qualified repair person using
only identical replacement parts.
This will ensure that the safety of
power tool is maintained.
Safety instructions for all
operations
Safety warning common for Grinding
or Abrasive Cutting-off operations:
1) This power tool is intended to
function as a grinder, or cut-off
tool. Read all safety warnings,
instructions, illustrations and
specifications provided with this
power tool. Failure to follow all in-
structions listed below may result
in electric shock, fire and/or seri-
ous injury.
2) Operations such as sanding,
wire brushing, polishing are not
recommended to be performed
with this power tool. Operations
for which the power tool was not
designed may create a hazard and
cause per-sonal injury.
3) Do not use accessories which
are not specifically designed and
recommended by the tool manu-
facturer. Just because the acces-
sory can be attached to your power
tool, it does not assure safe opera-
tion.
4) The rated speed of the accesso-
ry must be at least equal to the
maximum speed marked on the
power tool. Accessories running
faster than their RATED SPEED
can break and fly apart.
5) The outside diameter and the
thickness of your accessory
must be within the capacity rat-

- 7 -
ing of your power tool. Incorrect-
ly sized accessories cannot be ad-
equately guarded or controlled.
6) The arbour size of wheels, flang-
es, backing pads or any other
accessory must properly fit the
spindle of the power tool. Acces-
sories with arbour holes that do not
match the mounting hardware of
the power tool will run out of bal-
ance, vibrate excessively and may
cause loss of control.
7) Do not use a damaged acces-
sory. Before each use inspect
the accessory such as abrasive
wheels for chips and cracks.
If power tool or accessory is
dropped, inspect for damage or
install an undamaged accesso-
ry. After inspecting and install-
ing an accessory, position your-
self and bystanders away from
the plane of the rotating acces-
sory and run the power tool at
maximum no-load speed for one
minute. Damaged accessories will
normally break apart during this
test time.
8) Wear personal protective equip-
ment. Depending on applica-
tion, use face shield, safety gog-
gles or safety glasses. As ap-
propriate, wear dust mask, hear-
ing protectors, gloves and work-
shop apron capable of stopping
small abrasive or workpiece
fragments. The eye protection
must be capable of stopping fly-
ing debris generated by various
operations. The eye protection
must be capable of stopping flying
debris generated by various oper-
ations. The dust mask or respirator
must be capable of filtrating parti-
cles generated by your operation.
Prolonged exposure to high inten-
sity noise may cause hearing loss.
9) Keep bystanders a safe dis-
tance away from work area. Any-
one entering the work area must
wear personal protective equip-
ment. Fragments of workpiece
or of a broken accessory may fly
away and cause injury beyond im-
mediate area of operation.
10) Hold power tool by insulated
gripping surfaces only, when
performing an operation where
the cutting accessory may con-
tact hidden wiring or its own
cord. Cutting accessory contacting
a “live” wire may make exposed
metal parts of the power tool “live”
and shock the operator.
11) Position the cord clear of the
spinning accessory. If you lose
control, the cord may be cut or
snagged and your hand or arm
may be pulled into the spinning ac-
cessory.
12) Never lay the power tool down
until the accessory has come to
a complete stop. The spinning ac-
cessory may grab the surface and
pull the power tool out of your con-
trol.
13) Do not run the power tool while
carrying it at your side. Acciden-
tal contact with the spinning ac-
cessory could snag your cloth-
ing, pulling the accessory into your
body.
14)
Regularly clean the power tool’s
air vents. The motor’s fan will draw
the dust inside the housing and ex-
cessive accumulation of powdered
metal may cause electrical hazards.
15) Do not operate the power tool
near flammable materials. Sparks
could ignite these materials.
16) Do not use accessories that re-
quire liquid coolants. Using water
or other liquid coolants may result
in electrocution or shock.

- 8 -
Further safety instructions for
all operations
Kickback and Related Warnings
Kickback is a sudden reaction to a
pinched or snagged rotating wheel,
backing pad, brush or any other ac-
cessory. Pinching or snagging causes
rapid stalling of the rotating accesso-
ry which in turn causes the uncon-
trolled 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 work-
piece, the edge of the wheel that is
entering into the pinch point can dig
into the surface of the material caus-
ing the wheel to climb out or kick out.
The wheel may either jump toward
or away from the operator, depend-
ing on direction of the wheel’s move-
ment at the point of pinching. Abra-
sive 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.
1) Maintain a firm grip on the power
tool and position your body and
arm to allow you to resist kick-
back forces. Always use auxil-
iary handle, if provided, for max-
imum control over kickback or
torque reaction during start-up.
The operator can control torque re-
actions or kickback forces, if prop-
er precautions are taken.
2) Never place your hand near the
rotating accessory. Accessory
may kickback over your hand.
3) Do not position your body in the
area where power tool will move
if kickback occurs. Kickback will
propel the tool in direction oppo-
site to the wheel’s movement at the
point of snagging.
4) Use special care when working
corners, sharp edges etc. Avoid
bouncing and snagging the ac-
cessory. Corners, sharp edges or
bouncing have a tendency to snag
the rotating accessory and cause
loss of control or kickback.
5) Do not attach a saw chain wood-
carving blade or toothed saw
blade. Such blades create frequent
kickback and loss of control.
Additional safety instructions
for grinding and cutting-off
operations
Safety warnings specific for Grinding
and Abrasive Cutting-off operations:
1) Use only wheel types that are
recommended for your power
tool and the specific guard de-
signed for the selected wheel.
Wheels for which the power tool
was not designed cannot be ade-
quately guarded and are unsafe.
2) The guard must be securely at-
tached to the power tool and po-
sitioned for maximum safety, so
the least amount of wheel is ex-
posed towards the operator. The
guard helps to protect operator
from broken wheel fragments and
accidental contact with wheel.
3) Wheels must be used only for
recommended applications. For
example: do not grind with the
side of cut-off wheel. Abrasive
cut-off wheels are intended for pe-
ripheral grinding, side forces ap-
plied to these wheels may cause
them to shatter.
4)
Always use undamaged wheel
flanges that are of correct size
and shape for your selected
wheel. Proper wheel flanges sup-
port the wheel thus reducing the
possibility of wheel breakage. Flang-
es for cut-off wheels may be differ-
ent from grinding wheel flanges.
5) 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.

- 9 -
Additional Safety Warnings
Specific for Abrasive Cutting-
Off Operations:
1) Do not “jam” the cut-off wheel
or apply excessive pressure. Do
not attempt to make an exces-
sive depth of cut. Overstressing
the wheel increases the loading and
susceptibility to twisting or binding of
the wheel in the cut and the possibili-
ty of kickback or wheel breakage.
2)
Do not position your body in
line with and behind the rotat-
ing wheel. When the wheel, at the
point of operation, is moving away
from your body, the possible kick-
back may propel the spinning wheel
and the power tool directly at you.
3) When wheel is binding or when
interrupting a cut for any reason,
switch off the power tool and hold
the power tool motionless until
the wheel comes to a complete
stop. Never attempt to remove the
cut-off wheel from the cut while
the wheel is in motion otherwise
kickback may occur. Investigate
and take corrective action to elimi-
nate the cause of wheel binding.
4) Do not restart the cutting oper-
ation in the workpiece. Let the
wheel reach full speed and care-
fully reenter the cut. The wheel
may bind, walk up or kickback if
the power tool is restarted in the
workpiece.
5) Support panels or any oversized
workpiece to minimize the risk
of wheel pinching and kickback.
Large workpieces tend to sag un-
der their own weight. Supports
must be placed under the work-
piece near the line of cut and near
the edge of the workpiece on both
sides of the wheel.
6) Use extra caution when mak-
ing a “pocket cut” into existing
walls or other blind areas. The
protruding wheel may cut gas or
water pipes, electrical wiring or ob-
jects that can cause kickback.
Symbol Meaning
V Volts
Direct current
nRated speed
… min-1 Revolutions or
reciprocation per minutes
Ah Electrical capacity of bat-
tery pack
To reduce the risk of
injury, user must read and
understand instruction
manual.
For indoor use only.
Always wear eye protec-
tion
WARNING:
Some dust created by power sand-
ing, sawing, grinding, drilling, and
other construction activities contains
chemicals known to the State of Cal-
ifornia 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 prod-
ucts
* Arsenic and chromium from chem-
ically-treated lumber.
To reduce your exposure to these
chemicals: work in a well ventilated
area, and work with approved safety
equipment, such as dust masks that
are specially designed to filter the
microscopic particles.

- 10 -
III. FOR BATTERY
CHARGER&BAT-
TERY PACK
Important Safety Instructions
1) SAVE THESE INSTRUCTIONS
-This manual contains important
safety and operating instructions
for battery charger EY0L80.
2)
Before using battery charger, read all
instructions and cautionary markings
on (1) battery charger, (2) battery pack.
3) CAUTION
-
- To reduce the risk of
injury, charge only Panasonic Bat-
tery Pack as shown in last page.
Other types of batteries may burst
causing personal injury and damage.
4) Do not expose charger to rain or
snow.
5) To reduce the risk of damaging the
electric plug and cord, pull by plug
rather than cord when disconnect-
ing charger.
6) Make sure cord is located so that it
will not be stepped on, tripped over,
or otherwise subjected to damage
or stress.
7) An extension cord should not be
used unless absolutely necessary.
Use of improper extension cord
could result in a risk of fire and
electric shock. If extension cord
must be used, make sure:
a. that pins on plug of extension
cord are the same number, size
and shape as those of plug on
charger.
b. that extension cord is proper-
ly wired and in good electrical
condition.
c. that wire size is large enough
for ampere rating of charger as
specified below.
RECOMMENDED MINIMUM AWG SIZE OF
EXTENSION CORDS FOR
BATTERY CHARGERS
AC Input Rating.
Amperes AWG Size of Cord
Equal to or
greater than But less
than Length of Cord, Feet
25 50 100 150
0 2 18 18 18 16
8) Do not operate charger with dam-
aged cord or plug – replace them
immediately.
9) Do not operate charger if it has re-
ceived a sharp blow, been dropped,
or otherwise damaged in any way;
take it to a qualified serviceman.
10) Do not disassemble charger; take
it to a qualified serviceman when
service or repair is required. Incor-
rect reassembly may result in a risk
of electric shock or fire.
11) To reduce the risk of electric shock,
unplug charger from outlet before
attempting any maintenance or
cleaning.
12) The charger and battery pack are
specifically designed to work to-
gether. Do not attempt to charge
any other cordless tool or battery
pack with this charger.
13) Do not attempt to charge the bat-
tery pack with any other charger.
14) Do not attempt to disassemble the
battery pack housing.
15) Do not store the tool and bat-
tery pack in locations where the
temperature may reach or exceed
50°C (122°F) (such a metal tool
shed, or a car in the summer),
which can lead to deterioration of
the storage battery.
16) Do not charge battery pack when
the temperature is BELOW 0°C
(32°F) or ABOVE 40°C (104°F).
This is very important.
17) Do not incinerate the battery pack.
It can explode in a fire.
18) Avoid dangerous environment. Do
not use charger in damp or wet lo-
cations.
19) The charger is designed to operate
on standard household electrical
power only. Do not attempt to use it
on any other voltage!
20) Do not abuse cord. Never carry
charger by cord or yank it to discon-
nect from outlet. Keep cord away
from heat, oil and sharp edges.
21) Charge the battery pack in a well
ventilated place, do not cover the

- 11 -
charger and battery pack with a
cloth, etc., while charging.
22) Use of an attachment not recom-
mended may result in a risk of fire,
electric shock, or injury to persons.
23) Do not short the battery pack. A
battery short can cause a large cur-
rent flow, over heating and burns.
24) NOTE: If the supply cord of this ap-
pliance is damaged, it must only be
replaced by a repair shop appoint-
ed by the manufacturer, because
special purpose tools are required.
25)
TO REDUCE THE RISK OF ELEC-
TRIC SHOCK, THISAPPLIANCE HAS
APOLARIZED PLUG (ONE BLADE IS
WIDER THAN THE OTHER).
This plug will fit in a polarized outlet
only one way. If the plug does not fit
fully in the outlet, reverse the plug. If
it still does not fit, contact a qualified
electrician to install the proper outlet.
Do not change the plug in any way.
WARNING:
• Do not use other than the Panason-
ic battery packs that are designed
for use with this rechargeable tool.
• Do not dispose of the battery pack in
a fire, or expose it to excessive heat.
• Do not drive the likes of nails into the
battery pack, subject it to shocks,
dismantle it, or attempt to modify it.
• Do not allow metal objects to touch
the battery pack terminals.
• Do not carry or store the battery
pack in the same container as nails
or similar metal objects.
• Do not charge the battery pack in
a high-temperature location, such
as next to a fire or in direct sunlight.
Otherwise, the battery may over-
heat, catch fire, or explode.
• Never use other than the dedicated
charger to charge the battery pack.
Otherwise, the battery may leak,
overheat, or explode.
•After removing the battery pack
from the tool or the charger, always
reattach the pack cover. Otherwise,
the battery contacts could be short-
ed, leading to a risk of fire.
IV. ASSEMBLY
NOTE:
When attaching or removing a slide han-
dle, disconnect battery pack from tool.
CAUTION:
• Always be sure that the side han-
dle is installed securely before op-
eration.
Screw the side handle securely as
shown in the figure.
CAUTION:
• Never actuate the lock pin when
the spindle is rotating. The tool
may be damaged.
Press the lock button to prevent spindle
rotation when installing or removing parts,
such as grinding disc, disc guard, etc.
Installing or removing disc
Inspection before use
• Has the correct grinding disc been
mounted for the object to be ground?
• Has the proper diameter of the grind-
ing disc been mounted for the tool
rating?
• Has the proper grinding disc com-
plied to safety standard listed below
been mounted?
U.S.A, Canada - ANSI
1. Grinding disc
guard
2. Spindle
3. Grinding disc
guard fixing
screw
3
2
1

- 12 -
CAUTION:
• When using, the Grinding disc
guard must be installed on the
tool so that the closed side of the
guard always faces toward the op-
erator.
•Ensure that blotters are used
when they are provided with the
bonded abrasive product and
when they are required;
WARNING:
• Always use supplied guard when
using tool. Grinding disc can shat-
ter during use and Grinding disc
guard helps to reduce chances of
personal injury.
1. Install the Grinding disc guard, and
then securely tighten the screw.
1. Clamp nut
2. Grinding
disc
3. Disc flange
2
1
3
2. Install the disc flange and the disc to the
spindle in order as shown in the figure.
3. Tighten the clamp nut onto the spin-
dle so that hollow side faces oppo-
site direction to the disc.
4. Push the Spindle lock button to se-
cure the spindle in place, and then
use the clamp nut wrench to tighten
the clamp nut securely.
1. Spindle lock
button
1
5. To remove the grinding disc, follow
the installation procedure in reverse.
Attaching or Removing Battery
Pack
1. To connect the battery pack:
Line up the alignment marks and at-
tach the battery pack.
• Slide the battery pack until it locks
into position.
Alignment marks
2. To remove the battery pack:
Push on the button from the front to
release the battery pack.
Button
V. OPERATION
NOTE:
Be aware that this tool is always in
an operating condition, since it does
not have to be plugged into an elec-
trical outlet.
Power switch operation
1. Power switch
1
CAUTION:
• Before inserting the battery pack
into the tool, always make sure
that the power switch operates
position when the rear of the pow-
er switch is depressed.
• Power switch can be locked in
“ON” position. Stay alert when
locking tool in “ON” position and
grasp the tool firmly using sup-
port handle and grip.
Make sure
the side.

- 13 -
To start the tool, press and slide the
power switch toward the “ON” posi-tion.
For continuous operation, press the
front of the power switch to lock it.
To stop the tool, press the rear of the
power switch, then slide it toward the
“OFF” position.
WARNING:
• It should never be necessary to
force the tool. The weight of the
tool applies adequate pressure.
Forcing and excessive pressure
could cause dangerous grinding
disc breakage.
• ALWAYS replace grinding disc if
tool is dropped while grinding.
• NEVER bang or hit grinding disc.
• Avoid bouncing and snagging the
grinding disc, especially when
working corners, sharp edges etc.
This can cause loss of control and
kickback.
CAUTION:
• After operation, always switch off
the tool and wait until the wheel
has come to a complete stop be-
fore putting the tool down.
Visual inspection and workout
test on disc
1. Always make sure that the disc has
no cracks before use.
2. Always give workout test on the
blade as follows.
3. Always make sure the disc is firmly
fixed.
Work out time
Brand new disc more than 3 min.
Before use on
current disc more than 1 min.
Grinding operation
AB
ALWAYS hold the tool firmly with one
hand on grip and the other on the side
handle. Turn on the tool on and then ap-
ply the wheel or disc to the workpiece.
In general, keep the edge of the wheel
or grinding disc at an angle of about 15
degrees to the workpiece surface.
When using a new grinding disc, do not
work the grinder in the B direction or it will
cut into the workpiece. Once the edge of
the grinding disc has been rounded off by
use, the grinding disc may be worked in
both A and B direction.

- 14 -
Using a cut-off disc guard
(EY9X213E) (Available as an
accessory, not included)
Make sure the side.
WARNING:
• When using an abrasive cut-off
disc, be sure to use only the cut-
off disc guard designed for this
use with cut-off disc.
• NEVER use cut-off disc for grinding.
• Do not jam the Disc or apply ex-
cessive pressure. Do not attempt
to make an excessive depth of
cut. Overstressing the cut-off disc
increases the loading and suscep-
tibility to twisting or binding of the
cut-off disc in the cut and the pos-
sibility of kickback, cut-off disc
breakage and overheating of the
motor may occur.
• Do not start when disc is in the
workpiece. To do so causes the cut-
off disc binding or kickback. Let the
cut-off disc reach full speed and
then carefully cut the workpiece.
• During cutting operations, never
change the angle of the disc. Plac-
ing side pressure on the cut-off
disc (as in grinding) will cause the
disc to crack and break, causing
serious personal injury.
CAUTION:
• To prevent excessive temperature
increase of the tool surface, do
not operate the tool continuously
using two or more battery packs.
The tool needs cool-off time be-
fore switching to another pack.
• Do not close up ventilation slots
on the sides of the body during
operation. Otherwise, the machine
function is adversely affected to
cause a failure.
• Do NOT strain the tool (motor).
This may cause damage to the unit.
• Use the tool in such a way as to
prevent the air from the ventila-
tion slots from blowing directly
onto your skin. Otherwise, you
may get burned.
Indicator lamp for On lock
warning lamp function
The grinder will not start when the
switch is at the ON position (switch le-
ver at ON), even when the battery pack
is inserted. The warning lamp will flash
at this time to indicate that the on lock
start prevention function has operated.
Press the switch to the OFF position
(switch lever at OFF) and then press it
back to the ON position (switch lever at
ON) to start the grinder.
ON OFF

- 15 -
Overheat warning lamp
Off
(normal
operation)
Flashing: Overheat
Indicates operation
has been halted due to
battery overheating.
The overheating protection feature halts
operation to protect the battery pack
in the event of overheating. The over-
heat warning lamp on the control panel
flashes when this feature is active.
• If the overheating protection feature
activates, allow the tool to cool thor-
oughly (at least 30 minutes). The
battery is ready for use when the
over-heat warning lamp goes out.
• Avoid using the tool in a way that
causes the overheating protection
feature to activate repeatedly.
Battery low warning lamp
Off
(normal
operation)
Flashing
(No charge)
Battery protection
feature active
Excessive (complete) discharging of
lithium ion batteries shortens their ser-
vice life dramatically. The tool includes
a battery protection feature designed
to prevent excessive discharging of the
battery pack.
• The battery protection feature acti-
vates immediately before the battery
loses its charge, causing the battery
low warning lamp to flash.
• If you notice the battery low warn-
ing lamp flashing, charge the battery
pack immediately.
- Accidental re-start preventive function
- Even if the battery pack is inserted on
the tool with the power switch in the
“ON” position, the tool does not start.
At this time, the lamp flickers slowly
and this shows that the accidental re-
start preventive function is at work.
- To start the tool, first slide the power
switch toward the “OFF” position and
then slide it toward the “ON” position.
[Battery Pack]
[Battery Pack]
For Appropriate Use of
For Appropriate Use of
Battery pack
Battery pack
Li-ion Battery pack (EY9L40)
• For optimum battery life, store the Li-
ion battery pack following use with-
out charging it.
• When charging the battery pack,
confirm that the terminals on the bat-
tery charger are free of foreign sub-
stances such as dust and water etc.
Clean the terminals before charging
the battery pack if any foreign sub-
stances are found on the terminals.
The life of the battery pack termi-
nals may be affected by foreign sub-
stances such as dust and water etc.
during operation.
• When battery pack is not in use,
keep it away from other metal ob-
jects like: paper clips, coins, keys,
nails, screws, or other small metal
objects that can make a connection
from one terminal to another.
Shorting the battery terminals togeth-
er may cause sparks, burns or a fire.
• When operating the battery pack,
make sure the work place is well
ventilated.
• When the battery pack is removed
from the main body of the tool, re-
place the battery pack cover imme-
diately in order to prevent dust or dirt
from contaminating the battery ter-
minals and causing a short circuit.

- 16 -
Battery Pack Life
The rechargeable batteries have a lim-
ited life. If the operation time becomes
extremely short after recharging, re-
place the battery pack with a new one.
Battery Recycling
ATTENTION:
FOR Li-ion Battery Pack, EY9L40
A Li-ion battery that is recyclable pow-
ers the product you have purchased.
Please call 1-800-8-BATTERY for infor-
mation on how to recycle this battery.
[Battery Charger]
[Battery Charger]
Charging
Charging
Cautions for the Li-ion Battery
Pack
• If the temperature of the battery pack
falls approximately below −10°C
(14°F), charging will automatically
stop to prevent degradation of the
battery.
Common Cautions for the Li-
ion/Ni-MH/Ni-Cd Battery Pack
• The ambient temperature range
is between 0°C (32°F) and 40°C
(104°F).
If the battery pack is used when the
battery temperature is below 0°C
(32°F), the tool may fail to function
properly.
• When charging a cool battery pack
(below 0°C (32°F)) in a warm place,
leave the battery pack at the place
and wait for more than one hour to
warm up the battery to the level of
the ambient temperature.
• Cool down the charger when charg-
ing more than two battery packs con-
secutively.
• During charging, the charger may
become slightly warm. This is nor-
mal. Do NOT charge the battery for
a long period.
CAUTION:
To prevent the risk of fire or damage to
the battery charger.
• Do not use power source from an
engine generator.
• Do not cover vent holes on the
charger and the battery pack.
• Unplug the charger when not in use.
Li-ion Battery Pack
NOTE:
Your battery pack is not fully charged
at the time of purchase. Be sure to
charge the battery before use.
Battery charger (EY0L80)
1. Plug the charger into the AC outlet.
NOTE:
Sparks may be produced when the
plug is inserted into the AC power
supply, but this is not a problem in
terms of safety.
2. Insert the battery pack firmly into the
charger.
1.Line up the alignment marks and
place the battery onto the dock on
the charger.
2. Slide forward in the direction of the
arrow. Alignment
marks
3. During charging, the charging lamp will
be lit.
When charging is completed, an inter-
nal electronic switch will automatically
be triggered to prevent overcharging.
• Charging will not start if the battery
pack is warm (for example, immedi-
ately after heavy-duty operation).
The orange standby lamp will be
flashing until the battery cools down.
Charging will then begin automatically.
4.The charge lamp (green) will flash
slowly once the battery is approximate-
ly 80% charged.

- 17 -
5.When charging is completed, the
charging lamp will start flashing quickly
in green color.
6. If the temperature of the battery pack
is 0°C or less, charging takes longer to
fully charge the battery pack than the
standard charging time.
Even when the battery is fully charged,
it will have approximately 50% of the
power of a fully charged battery at nor-
mal operating temperature.
7.If the power lamp does not light im-
mediately after the charger is plugged
in, or if after the standard charging
time the charging lamp does not flash
quickly in green, consult an authorized
service center.
8. If a fully charged battery pack is insert-
ed into the charger again, the charging
lamp lights up. After several minutes,
the charging lamp may flash quickly to
indicate the charging is completed.
Ni-MH/Ni-Cd Battery Pack
NOTE:
When you charge the battery pack for the first time, or after prolonged storage,
charge it for about 24 hours to bring the battery up to full capacity.
Battery charger (EY0L80)
1. Plug the charger into the AC outlet.
NOTE:
Sparks may be produced when the plug is inserted into the AC power supply, but
this is not a problem in terms of safety.
2. Insert the battery pack firmly into the charger.
3. During charging, the charging lamp will be lit.
When charging is completed, an internal electronic switch will automatically be trig-
gered to prevent overcharging.
• Charging will not start if the battery pack is warm (for example, immedi-ately af-
ter heavy-duty operation).
The orange standby lamp will be flashing until the battery cools down. Charging
will then begin automatically.
4. When charging is completed, the charging lamp will start flashing quickly in green
color.
5. If the charging lamp does not light immediately after the charger is plugged in, or if
after the standard charging time the charging lamp does not flash quickly in green,
consult an authorized service center.
6. If a fully charged battery pack is inserted into the charger again, the charging lamp
lights up. After several minutes, the charging lamp may flash quickly to indicate the
charging is completed.

- 18 -
LAMP INDICATIONS
LAMP INDICATIONS
Green Lit
Charger is plugged into theAC outlet.
Ready to charge.
Green Flashing Quickly
Charging is completed. (Full charge.)
Green Flashing
Battery is approximately 80% charged. (Usable charge. Li-
ion only)
Green Lit
Now charging.
Orange Lit
Battery pack is cool.
The battery pack is being charged slowly to reduce the load
on the battery. (Li-ion only)
Orange Flashing
Battery pack is warm. Charging will begin when temperature
of battery pack drops.
If the temperature of the battery pack is –10°C or less, the
charging status lamp (orange) will also start flashing. Charging
will begin when the temperature of the battery pack goes up (Li-
ion only)
Charging Status Lamp
Left: green Right: orange will be displayed.
Both Orange and Green Flashing Quickly
Charging is not possible. Clogged with dust or malfunction of
the battery pack.

- 19 -
Replacing carbon brushes
Keep the carbon brushes clean and
free to slip in the holders. When it is
less than 5 mm (3/16”) shorter both
carbon brushes should be replaced at
the same time. Use only identical car-
bon brushes.
Insert the top end of slotted bit screw-
driver into the notch in the tool and re-
move the brush cap cover by lifting it
up.1. Brush cap
cover
2. Brush cap
2
1
Use a screwdriver to remove the caps.
Take out the worn carbon brushes, in-
sert the new ones and secure the brush
caps.
Reinstall the brush cap cover on the
tool.
To maintain product SAFETY and RE-
LIABILITY, repairs, any other mainte-
nance or adjustment should be per-
formed by Panasonic Authorized or
Factory Service Centers, always using
Panasonic replacement parts.
VI. MAINTENANCE
Use only a dry, soft cloth for wiping the
unit. Do not use a damp cloth, thinner,
benzine, or other volatile solvents for
cleaning.
VII. ACCESSORIES
CAUTION:
• The use of any accessories not
specified in this manual may re-
sult in fire, electric shock, or per-
sonal injury. Use recommended
accessories only.
• Your tool is supplied with a guard
for use with a grinding disc. A cut-
off disc can also be used with a
cut-off disc guard. If you decide to
use your Panasonic grinder with
approved accessories which you
purchase from your Panasonic dis-
tributor or factory service center,
be sure to obtain and use all nec-
essary fasteners and guards as
recommended in this manual. Your
failure to do so could result in per-
sonal injury to you and others.
Grinding Disc
• EY9X202E
Wheel diameter 115 mm (4-1/2”) x
6 mm (1/4”) x 22 mm (7/8”)
Grinding Disc Guard
• EY9X212E
Cut-off Disc
• EY9X203E
Wheel diameter 115 mm (4-1/2”) x
2.5 mm (3/32”) x 22 mm (7/8”)
Cut-off Disc Guard (For cut-off disc)
• EY9X213E
Disc Flange
• EY9X221E
Clamp Nut
• EY9X231E
Carbon brush

- 20 -
VIII. SPECIFICATIONS
MAIN UNIT
Mounting wheel diameter 115 mm (4-1/2”)
Mounting wheel innerhole diameter 22 mm (7/8”)
Spindle thread size M14
Motor voltage 14.4 V DC
Rated speed 9500 min-1 (rpm)
Weight (with battery pack) 2.2 kg(4.8 lbs)
Overall length 361 mm (14-7/32”)
BATTERY PACK
Model EY9L40
Storage battery Li-ion Battery
Battery voltage 14.4 V DC (3.6 V x 4 cells)
Capacity 3 Ah
BATTERY CHARGER
Model EY0L80
Rating See the rating plate on the bottom of the charger.
Weight 0.95 kg(2.1 lbs)
[Li-ion battery pack]
Charging time 3 Ah
14.4 V 21.6 V 28.8 V
EY9L40
Usable: 35 min.
Full: 50 min.
EY9L60
Usable: 45 min.
Full: 60 min.
EY9L80
Usable: 55 min.
Full: 70 min.