Panasonic Ey4640 Operating Instructions Manual

							Cordless Angle Grinder
Meule dangle sans fi l
Amoladora angular inalámbrica
Operating Instructions
Instructions dutilisation
Manual de instrucciones
Model No: EY4640
IMPORTANTThis manual contains safety information. Read manual completely before first using this product and save this 
manual for future use.
IMPORTANTCe mode d’emploi contient des informations sur la sécurité. Lisez-le en entier avant d’utiliser le produit et 
conservez-le pour référence.
IMPORTANTEEste 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. 
						

							- 2 - 
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 daffi chage Panel de exhibición
(D)Battery low warning lampTémoin d’avertissement de batterie basseLuz de aviso de baja carga de batería
(E)On lock warning lampTémoin davertissement à verrou activéLuz 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 markMarque dalignement Marca de alineación
(I)Battery pack release buttonBouton de libération de batterie autonomeBotón de liberación de batería
(J)Brush cap coverCouvercle de capuchon des charbonsCubierta de tapa de cepillo
(K)Support handle Manche de support Mango de soporte
(L)Support handle mounting 
holeOrifi ce de montage du manche 
de supportOrifi cio de montaje de mango 
de soporte
(M)Grinding disc guard Carter de disque abrasifProtección de disco de desbastado
(N)Grinding disc guard fi xing 
screwVis de fi xation du carter de 
disque abrasifTornillo de fi jación de protector 
de disco de amoladora
(O)Spindle Axe Eje
(P)Spindle lock button Bouton de blocage de laxe Botón de bloqueo de eje
(Q)Li-ion battery pack dockPoste d’accueil de la batterie 
autonome Li-ionEnchufe 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 
dockPoste d’accueil de la batterie 
autonome Ni-MH/Ni-CdEnchufe de carga de batería 
Ni-MH/Ni-Cd
(T)Battery pack coverCouvercle de la batterie autonomeCubierta de la batería
(U)Clamp nut Écrou de serrage de collier Tuerca de abrazadera
(V)Disc fl ange Flasque du disque Brida de disco
(W)Disc wrench Clé de disque Llave de disco 
						

							- 4 - 
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
-1Revolutions or 
reciprocation per minutes
AhElectrical 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 IN STRUCTIONS -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.
AmperesAWG Size of Cord
Equal to or 
greater thanBut less 
thanLength 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) D o  not store the tool and bat-
tery pack in locations where the 
tempera ture 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