Panasonic Cordles Impact Driver/Cordles Impact Wrench EY75A4/75A5 Operating Instructions

							- 11  -  
• When the main unit is held by the belt hook, avoid jumping or running with it.   
Doing so may cause the hook to slip and 
the main unit may fall. 
  This may result in an accident or injury.
• When the belt hook is not used, be sure  to return it to the storing position. The belt 
hook may catch on something. 
  This may result in an accident or injury.
• 
When the unit is hooked onto the waist belt 
by the belt hook, do not attach driver bits to 
the unit. A sharp edge object, such as a drill 
bit, may cause injury or an accident. 
To Change the Belt Hook 
Location Side
The belt hook can be attached to either side 
of the unit.
1.  Removing the hook
  (1) Remove the nut.
  (2) Draw out the hook.
2.  Attaching the hook to the other side
  (1) Insert the hook in the other side.
 (2)   Tighten the nut fully so that it securely 
fastened.
Variable Speed Control TriggerTo set the center of a hole, pull the trigger 
slightly to start the bit rotation slowly.
The more the speed control trigger is 
pulled, the higher the speed becomes.
CAUTION:When operating the tool by pulling the 
trigger, there may be a momentary lag 
before rotation starts. This does not signal 
a malfunction. • This lag occurs as the tool’s circuitry  starts up when the trigger is pulled for 
the first time after installing a new bat-
tery pack or after the tool has not been 
used for at least 1 minute (or at least 5 
minutes when the LED is on). Rotation 
will start without any lag during second 
and subsequent operations.
Control Panel
(1)
(3) (2)
(1) LED lightPressing the  but ton tog-
gles the LED light on and off. 
The light illuminates with 
very low current, and it does 
not adversely affect the per-
formance 
of the driver during 
use or its battery capacity.
CAUTION:• The built-in LED light is designed to illu- minate the small work area temporarily. 
• 
Do not use it as a substitute for a regu-
lar flashlight, since it does not have 
enough brightness.
This product has the built-in LED light.This product is classified into “Class 1 LED 
Product” to IEC (EN) 60825-1:2001.
Class 1 LED Product
Caution : DO NOT STARE INTO BEAM.
Use of controls or adjustments or performance 
of procedures other than those speci fi ed  herein 
may result in hazardous radiation exposure.
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							- 12 - 
more than a 15°C difference between 
the temperatures of the battery and the 
charging location.)
(3)  Battery low warning lamp
Off (normal 
operation) Flashing (No charge)
Battery protection 
feature active
Excessive (complete) discharging of 
lithium ion batteries shortens their service 
life dramatically. The driver includes a 
battery protection feature designed to 
prevent excessive discharging of the 
battery pack.
•  The battery protection feature activates 
immediately before the battery loses its 
charge, causing the battery low warning 
lamp to flash.
• If you notice the battery low warning  lamp flashing, charge the battery pack 
immediately.
•  If it is started with too little battery power  remaining, the tool may stop operating 
without the battery low warning lamp 
flashing first. This indicates that there is 
too little battery power remaining to use 
the tool, and the battery pack should be 
charged before further use.
Recommended Grip
Use the grip to hold and operate the driver 
with one hand. If the job requires additional 
force, you can push against the rear end of 
the driver with your other hand.
[Battery Pack]
For Appropriate Use of Bat-
tery Pack
Li-ion Battery Pack
• For optimum battery life, store the Li-ion bat-
tery pack following use without charging it.
• When charging the battery pack, confirm that the terminals on the battery charger 
are free of foreign substances such as 
dust and water etc. Clean the terminals 
before charging the battery pack if any 
foreign substances are found on the ter-
minals. 
  The life of the battery pack terminals may 
(2)  Overheat warning lamp
Off
(normal
operation)
Illuminated:
Overheat
(motor)Flashing:
Overheat
(battery)
Indicates operation has 
been halted due to motor 
or battery overheating.
To protect the motor or battery, be sure to 
note the following when carrying out this 
operation. 
•  If the motor or battery becomes hot, the  protection function will be activated and 
the motor or battery will stop operating. 
The overheat warning lamp on the 
control panel illuminates or  flashes 
when this feature is active.
• If the overheating protection feature  activates, allow the tool to cool 
thoroughly (at least 30 minutes). The 
tool is ready for use when the overheat 
warning lamp goes out.
• Avoid using the tool in a way that  causes the overheating protection 
feature to activate repeatedly.
• If the tool is operated continuously  under high-load conditions or if it is 
used in hot-temperature conditions 
(such as during summer), the 
overheating protection feature may 
activate frequently.
•  If the tool is used in cold-temperature  conditions (such as during winter) or if 
it is frequently stopped during use, the 
overheating protection feature may not 
activate.
• The performance of the EY9L42  deteriorates significantly at and below 
10°C due to work conditions and other 
factors.
• 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.
• Use the charger at temperatures  between 0°C and 40°C, and charge the 
battery at a temperature similar to that 
of the battery itself. (There should be no 
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							- 13 -  
be affected by foreign substances such as 
dust and water etc. during operation. 
• 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 con-
nection from one terminal to another.
  Shorting the battery terminals together  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, replace the bat-
tery pack cover immediately in order to 
prevent dust or dirt from contaminating the 
battery terminals and causing a short cir-
cuit.
 
Battery Pack LifeThe rechargeable batteries have a lim-
ited life. If the operation time becomes 
extremely short after recharging, replace 
the battery pack with a new one.
Battery Recycling
ATTENTION:
FOR Li-ion Battery PackA Li-ion battery that is recyclable powers the 
product you have purchased. Please call 
1-800-8-BATTERY for information on how to 
recycle this battery.
[Battery Charger]
Charging
Cautions
• If the temperature of the battery pack 
falls approximately below  −10°C (14°F), 
charging will automatically stop to prevent 
degradation of the battery.
• 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. 
• Use the charger at temperatures between 0°C and 40°C, and charge the battery at 
a temperature similar to that of the battery 
itself. (There should be no more than a 
15°C difference between the temperatures 
of the battery and the charging location.)
• 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 charging  more than two battery packs consecutively.
• Do not insert your fingers into contact  hole, when holding charger or any other 
occasions.
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
1.  Plug the charger into the AC outlet.
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
EY0L82
3. During charging, the charging lamp will be 
illuminated.
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, immediately 
after heavy-duty operation).
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							- 14 - 
  The orange standby lamp will be flash-ing until the battery cools down.
  Charging will then begin automatically.
4.  The charge lamp (green) will flash slowly  once the battery is approximately 80% 
charged.
5. 
When charging is completed, the charging 
lamp in green color will turn off.
6.  If the temperature of the batter 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 normal operat-
ing temperature.
7. 
Consult an authorized dealer if the charging 
lamp (green) does not turn off.
8.  If a fully charged battery pack is inserted  into the charger again, the charging lamp 
lights up. After several minutes, the charg-
ing lamp in green color will turn off.
9.  Remove the battery pack while the battery  pack release button is held up.
Battery pack 
release button
EY0L82
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							- 15 -  
LAMP INDICATIONS
Charging is completed. (Full charge.)
Battery is approximately 80% charged. 
Now charging.
Charger is plugged into the AC outlet. Ready to charge.
(Green) (Orange)Charging Status Lamp.
Left: green  Right: orange will be displayed.
Battery pack is cool.
The battery pack is being charged slowly to reduce the load on the batte\
ry. 
Battery pack is warm. Charging will begin when temperature of battery pack drops. If the tempe\
rature of the 
battery pack is -10° or less, the charging status lamp (orange) wil\
l also start flashing .
Charging will begin when the temperature of the battery pack goes up
Charging is not possible. Clogged with dust or malfunction of the bat-
tery pack.
   Turn off    Illuminated    Flashing
Federal Communication Commission Interference Statement
This equipment has been tested and found to comply with the limits for a\
 Class B digital de-
vice, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable 
protection against harmful interference in a residential installation. This equipment generates, 
uses and can radiate radio frequency energy and, if not installed and us\
ed in accordance with 
the instructions, may cause harmful interference to radio communications\
. However, there is 
no guarantee that interference will not occur in a particular installati\
on. If this equipment does 
cause harmful interference to radio or television reception, which can b\
e determined by turn-
ing the equipment off and on, the user is encouraged to try to correct the interference by o\
ne 
of the following measures:
• Reorient or relocate the receiving antenna. 
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
FCC Caution: To assure continued compliance, install and use in accordance with provid-
ed instructions. Use only the battery pack specified in the instructions. Any changes or modi-
fications not expressly approved by the party responsible for compliance could void the user’s 
authority to operate this equipment.
This device complies with part 15 of the FCC Rules. Operation is subject to the following 
two conditions: (1) This device may not cause harmful interference, and (2) this device must 
accept any interference received, including interference that may cause undesired operation.
This Class B digital apparatus complies with Canadian ICES-003.
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							- 16 - 
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.
• In the event that the inside of the tool or  battery pack is exposed to water, drain 
and allow to dry as soon as possible. 
Carefully remove any dust or iron filings 
that collect inside the tool. If you experi-
ence any problems operating the tool, 
consult with a repair shop.
VII.   TIGHTENING 
TORQUE
The power required for tightening a bolt will 
vary, according to bolt material and size, as 
well as the material being bolted. Choose 
the length of tightening time accordingly.
Reference values are provided below.
(They may vary according to tightening conditions.)
Factors Affecting Tighten-
ing Torque
The tightening torque is affected by a wide 
variety of factors including the followings. 
After tightening, always check the torque 
with a torque wrench.
1) Voltage When the battery pack becomes near-
ly discharged, the voltage decreases and 
the tightening torque drops.
Bolt Tightening Conditions
EY75A4 14.4 V
M10 x 35 mm M12, M14, M16 x 45 mm Standard boltN × m  
(kg f-cm)



¢£



¢£



¢£



¢£

     
. . .
.
Tightening torque
Tightening time (Sec.)
EY75A4 14.4 V
M8, M10 x 35 mm. M12 x 45 mmHigh tensile bolt


¢£



¢£



¢£



¢£

     
N × m  
(kg f-cm)
.
.
.
Tightening torque
Tightening time (Sec.)
EY75A5 14.4 V
M10 x 35 mm M12, M14, M16 x 45 mm Standard bolt



¢£



¢£



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¢£

      .
. .
.
N s m  
(kg f-cm)
Tightening torque
Tightening time (Sec.)
EY75A5 14.4 V
M8, M10 x 35 mm. M12 x 45 mm
High tensile bolt


¢£



¢£



¢£



¢£

      .
.
.
N s m  
(kg f-cm)
Tightening torque
Tightening time (Sec.)
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							- 17 -  
EY75A4 18 V
M10 x 35 mm M12, M14, M16 x 45 mmStandard boltN × m  
(kg f-cm)



¢£



¢£



¢£



¢£

     
. . .
.
Tightening torque
Tightening time (Sec.)
EY75A4 18 V
M8, M10 x 35 mm. M12 x 45 mmHigh tensile bolt



¢£



¢£



¢£



¢£

     
N × m  
(kg f-cm)
.
.
.
Tightening torque
Tightening time (Sec.)EY75A5 18 V
M10 x 35 mm M12, M14, M16 x 45 mm Standard bolt



¢£



¢£



¢£



¢£

      .
. .
.
N s m  
(kg f-cm)
Tightening torque
Tightening time (Sec.)
EY75A5 18 V
M8, M10 x 35 mm. M12 x 45 mmHigh tensile bolt



¢£



¢£



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¢£

      .
.
.
N s m  
(kg f-cm)
Tightening torque
Tightening time (Sec.)
Bolt
Nut Washer
Steel plate
thickness 10 mm (3/8)
Washer
Spring washer
Tightening conditions
• The following bolts are used.
  Standard bolts: Strength type 4.8
  High tensile type 12.9
4.8
Explanation of the strength type
Bolt yield point
(
80% of tensile strength)32 kgf/mm2 (45000 psi)
Bolt tensile strength 
40 kgf/mm2 (56000 psi)
2) Tightening time Longer tightening time results in increased 
tightening torque. Excessive tightening, 
how  ever, adds no value and reduces the 
life of the tool.
3)  Different bolt diameters The size of the bolt diameter affects the 
tight ening torque.
Generally, as the bolt diameter increases, 
tightening torque rises.
4) Tightening conditions
 Tightening torque will vary, even with the 
same bolt, according to grade, length, and 
torque coefficient (the fixed coefficient indi-
cated by the manufacturer upon produc-
tion).
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							- 18 - 
VIII.  ACCESSORIES
Use only suitable size of bit.
Panasonic original Optional Quick change chuck (EY9HX110E).
Chuck Size: 6.35 mm (1/4”) hex
IX. APPENDIX
MAXIMUM RECOMMENDED CAPACITIES
Model EY75A4 EY75A5
Screw driving Wood screw
 3.5 mm -  9.5 mm
Self-drilling screw
 3.5 mm -  6 mm
Bolt fastening Standard bolt: M6 - M16
High tensile bolt: M6 - M12
X. SPECIFICATIONS
MAIN UNIT 
Model
EY75A4 EY75A5
Motor voltage 14.4 V DC 18 V DC 14.4 V DC 18 V DC
No load speed 0 - 2500 min
-1 (rpm) 0 - 2300 min-1 (rpm)
Maximum torque
150 N•m (1330 in - lbs)155 N•m (1370 in - lbs)200 N•m (1770 in - lbs)205 N•m (1815 in - lbs)
Impact per minute 0 - 3000 min-1 (rpm) 0 - 3500 min-1 (rpm)
Overall length 143 mm (5 - 5/8”) 155 mm (6 - 1/8”)
Weight (with battery pack: EY9L44)
1.55 kg (3.42 lbs)-1.55 kg (3.42 lbs)-
Weight (with battery pack: EY9L45)
1.55 kg (3.42 lbs)-1.55 kg (3.42 lbs)-
Weight (with battery pack: EY9L50) -
1.65 kg (3.64 lbs)-1.65 kg (3.64 lbs)
Weight (with battery pack: EY9L51) -1.65 kg (3.64 lbs)-1.65 kg (3.64 lbs)
 Tightening torque will vary, even with  the same bolting material (e.g. steel), 
accord ing to the surface finish.
 Torque is greatly reduced when the bolt and nut start turning together.
5) Socket play Torque is lowered as the six-sided configu-
ration of the socket of the  wrong size is 
used to tighten a bolt. 6)  Switch (Variable speed control trigger)
  Torque is lowered if the unit is used with 
the switch not fully depressed.
7)  Effect of Connecting Adaptor
  The tightening torque will be lowered  through the use of a universal joint or a 
connecting adaptor.
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							- 19 -  
BATTERY PACK
ModelEY9L41 EY9L42 EY9L44 EY9L45 EY9L50 EY9L51
Storage battery Li-ion Battery
Battery voltage 14.4 V DC
(3.6 V x 4 cells) 14.4 V DC
(3.6 V x 8 cells) 18 V DC
(3.6 V x 10 cells)
BATTERY CHARGER
Model EY0L82
Electrical rating See the rating plate on the bottom of the charger
Weight 0.93 kg (2 lbs)
Charging time EY9L41 EY9L42 EY9L44 EY9L45 EY9L50 EY9L51
Usable:  35 min Usable: 
30 min Usable: 
40 min Usable: 
50 min Usable: 
40 min Usable: 
55 min
Full: 
50 min Full: 
35 min Full: 
55 min Full: 
60 min Full: 
55 min Full: 
70 min
NOTE:   This chart may include models that are not available in your area.
Please refer to the latest general catalogue.
NOTE:  For the dealer name and address, please see the included warranty card.
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							- 20 - 
I.  CONSIGNES DE SECU-RITE GENERALES
 AVERTISSEMENT! Veuillez lire 
toutes les instructions.
Si les instructions détaillées ci-dessous ne 
sont pas observées, cela peut entraîner une 
électrocution, un incendie et/ou des blessures 
graves. Le terme “outil mécanique” utilisé dans 
tous les avertissements ci-dessous se réfère 
aux outils mécaniques opérés par cordons 
dalimentation et par batterie (sans  fi l).
CONSERVEZ CES INSTRUC-
TIONS
Sécurité de la zone de travail
1)  Gardez la zone de travail propre et 
bien aérée.
Les endroits encombrés et sombres invi-
tent les accidents.
2)  Ne faites pas fonctionner les outils 
mécaniques dans des atmosphères 
explosives, comme en présence de 
liquides inflammables, de gaz ou de 
poussière.
Les outils mécaniques génèrent des étin-
celles qui peuvent enflammer la pous-
sière ou les vapeurs.
3)  Gardez les enfants et les spectateurs 
éloignés lors du fonctionnement d’un 
outil mécanique.
Les distractions peuvent en faire perdre le 
contrôle.
Sécurité électrique
1) La fiche des outils mécaniques doit 
correspondre aux prises secteur. Ne 
modifiez la fiche sous aucun prétexte. 
N’utilisez pas de fiche adaptatrice avec 
les outils mécaniques mis à la terre.
Des fiches non modifiées et des prises 
secteur correspondant réduisent les 
risques d’électrocution.
2)  Evitez tout contact physique avec les 
surfaces mises à la terre telles que 
tuyaux, radiateurs, micro-ondes et 
réfrigérateurs.
Il y a un risque d’électrocution supplémen-
taire si votre corps est mis à la terre.
3) N’exposez pas les outils mécaniques à 
la pluie ou à des conditions humides.
De l’eau pénétrant dans un outil mécani-
que augmente le risque d’électrocution.
4)  Ne malmenez pas le cordon. N’utilisez 
jamais le cordon pour transporter, 
pour tirer ou pour débrancher l’outil 
mécanique. Gardez le cordon éloigné 
de la chaleur, de l’huile, d’objets aux 
bords coupants ou de pièces en 
mouvement.
Les cordons endommagés on emmêlés 
augmentent le risque délectrocution.
5) 
Lors du fonctionnement des outils 
méca  niques à l’extérieur, utilisez 
une rallonge adaptée à l’utilisation à 
l’extérieur.L’utilisation d’un cordon adapté à l’utilisa-
tion à l’extérieur réduit les risques d’élec-
trocution.
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