Makita DTW450 User manual

INSTRUCTION MANUAL
Cordless Impact Wrench
DTW450
ENGLISH: Original instructions
Read before use.

2ENGLISH
SPECIFICATIONS
Model DTW450
Capacities Standard bolt M12 - M22
High tensile bolt M12 - M16
Square drive 12.7 mm
No load speed (min-1)1,600
Impacts per minute 2,200
Max. fastening torque 440 N·m
Overall length 266 mm
Net weight 3.1 - 3.4 kg
Rated voltage D.C. 18 V
• Duetoourcontinuingprogramofresearchanddevelopment,thespecicationshereinaresubjecttochange
without notice.
• Specicationsmaydifferfromcountrytocountry.
• Theweightmaydifferdependingontheattachment(s),includingthebatterycartridge.Thelightestandheavi-
est combination, according to EPTA-Procedure 01/2014, are shown in the table.
Applicable battery cartridge and charger
Batterycartridge BL1815N / BL1820 / BL1820B / BL1830 / BL1830B / BL1840 /
BL1840B / BL1850 / BL1850B / BL1860B
Charger DC18RC / DC18RD / DC18RE / DC18SD / DC18SE / DC18SF
• Someofthebatterycartridgesandchargerslistedabovemaynotbeavailabledependingonyourregionof
residence.
WARNING: Only use the battery cartridges and chargers listed above.Useofanyotherbatterycartridges
andchargersmaycauseinjuryand/orre.
Symbols
Thefollowingshowthesymbolsusedfortheequip-
ment.Besurethatyouunderstandtheirmeaningbefore
use.
Read instruction manual.
Ni-MH
Li-ion
OnlyforEUcountries
Do not dispose of electric equipment or
batterypacktogetherwithhouseholdwaste
material!
In observance of the European Directives,
on Waste Electric and Electronic
Equipment and Batteries and Accumulators
and Waste Batteries and Accumulators
and their implementation in accordance
with national laws, electric equipment and
batteriesandbatterypack(s)thathave
reached the end of their life must be col-
lectedseparatelyandreturnedtoanenvi-
ronmentallycompatiblerecyclingfacility.
Intended use
The tool is intended for fastening bolts and nuts.
Noise
ThetypicalA-weightednoiseleveldeterminedaccord-
ing to EN62841-2-2:
Sound pressure level (LpA) : 94 dB (A)
Sound power level (LWA) : 105 dB (A)
Uncertainty(K):3dB(A)
NOTE: The declared noise emission value(s) has
been measured in accordance with a standard test
methodandmaybeusedforcomparingonetoolwith
another.
NOTE: The declared noise emission value(s)
mayalsobeusedinapreliminaryassessmentof
exposure.
WARNING: Wear ear protection.
WARNING: The noise emission during actual
use of the power tool can differ from the declared
value(s) depending on the ways in which the
tool is used especially what kind of workpiece is
processed.
WARNING: Be sure to identify safety mea-
sures to protect the operator that are based on an
estimation of exposure in the actual conditions of
use (taking account of all parts of the operating
cycle such as the times when the tool is switched
off and when it is running idle in addition to the
trigger time).
Vibration
The vibration total value (tri-axial vector sum) deter-
mined according to EN62841-2-2:
Work mode : impact tightening of fasteners of the
maximumcapacityofthetool
Vibration emission (ah) : 19.0 m/s2
Uncertainty(K):1.5m/s2

3ENGLISH
NOTE: The declared vibration total value(s) has been
measured in accordance with a standard test method
andmaybeusedforcomparingonetoolwithanother.
NOTE:Thedeclaredvibrationtotalvalue(s)mayalso
beusedinapreliminaryassessmentofexposure.
WARNING: The vibration emission during
actual use of the power tool can differ from the
declared value(s) depending on the ways in which
the tool is used especially what kind of workpiece
is processed.
WARNING: Be sure to identify safety mea-
sures to protect the operator that are based on an
estimation of exposure in the actual conditions of
use (taking account of all parts of the operating
cycle such as the times when the tool is switched
off and when it is running idle in addition to the
trigger time).
EC Declaration of Conformity
For European countries only
TheECdeclarationofconformityisincludedasAnnexA
to this instruction manual.
General power tool safety warnings
WARNING: Read all safety warnings, instruc-
tions, illustrations and specications provided
with this power tool. Failure to follow all instructions
listedbelowmayresultinelectricshock,reand/or
seriousinjury.
Save all warnings and instruc-
tions for future reference.
Theterm"powertool"inthewarningsreferstoyour
mains-operated(corded)powertoolorbattery-operated
(cordless) power tool.
Work area safety
1. Keep work area clean and well lit. Cluttered or
dark areas invite accidents.
2. Do not operate power tools in explosive atmo-
spheres, such as in the presence of ammable
liquids, gases or dust. Power tools create sparks
whichmayignitethedustorfumes.
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
adapter plugs with earthed (grounded) power
tools. Unmodiedplugsandmatchingoutletswill
reduce risk of electric shock.
2. Avoid body contact with earthed or grounded
surfaces, such as pipes, radiators, ranges and
refrigerators. 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 con-
ditions. Water entering a power tool will increase
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
increase 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.
6. If operating a power tool in a damp location
is unavoidable, use a residual current device
(RCD) protected supply. Use of an RCD reduces
the risk of electric shock.
7. Power tools can produce electromagnetic
elds (EMF) that are not harmful to the user.
However, users of pacemakers and other similar
medical devices should contact the maker of their
device and/or doctor for advice before operating
this power tool.
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 inuence of drugs, alcohol or med-
ication. A moment of inattention while operating
powertoolsmayresultinseriouspersonalinjury.
2. Use personal protective equipment. Always
wear eye protection. Protective equipment such
asadustmask,non-skidsafetyshoes,hardhator
hearing protection used for appropriate conditions
willreducepersonalinjuries.
3. Prevent unintentional starting. Ensure the
switch is in the off-position before connecting
to power source and/or battery pack, picking
up or carrying the tool.Carryingpowertoolswith
yourngerontheswitchorenergising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 situations.
6. Dress properly. Do not wear loose clothing or
jewellery. Keep your hair and clothing away
from moving parts.Looseclothes,jewellery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 properly used. Use of
dust collection can reduce dust-related hazards.
8. Do not let familiarity gained from frequent use
of tools allow you to become complacent and
ignore tool safety principles. A careless action
cancausesevereinjurywithinafractionofa
second.
9. Always wear protective goggles to protect
your eyes from injury when using power tools.
The goggles must comply with ANSI Z87.1 in
the USA, EN 166 in Europe, or AS/NZS 1336
in Australia/New Zealand. In Australia/New
Zealand, it is legally required to wear a face
shield to protect your face, too.

4ENGLISH
It is an employer's responsibility to enforce
the use of appropriate safety protective equip-
ments by the tool operators and by other per-
sons in the immediate working area.
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 controlled with the switch is dangerous and
must be repaired.
3. Disconnect the plug from the power source
and/or remove the battery pack, if detachable,
from the power tool before making any adjust-
ments, changing accessories, or storing power
tools.Suchpreventivesafetymeasuresreduce
theriskofstartingthepowertoolaccidentally.
4. Store idle power tools out of the reach of chil-
dren and do not allow persons unfamiliar with
the power tool or these instructions to operate
the power tool. Power tools are dangerous in the
hands of untrained users.
5. Maintain power tools and accessories. Check
for misalignment or binding of moving parts,
breakage of parts and any other condition that
may affect the power tool’s operation. If dam-
aged, 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control.
7. Use the power tool, accessories and tool bits
etc. in accordance with these instructions, tak-
ing into account the working conditions and
the work to be performed. Use of the power tool
for operations different from those intended could
result in a hazardous situation.
8. Keep handles and grasping surfaces dry,
clean and free from oil and grease.Slippery
handles and grasping surfaces do not allow for
safe handling and control of the tool in unexpected
situations.
9. When using the tool, do not wear cloth work
gloves which may be entangled. The entangle-
mentofclothworkglovesinthemovingpartsmay
resultinpersonalinjury.
Battery tool use and care
1. Recharge only with the charger specied by
the manufacturer. A charger that is suitable for
onetypeofbatterypackmaycreateariskofre
whenusedwithanotherbatterypack.
2. Use power tools only with specically desig-
nated battery packs.Useofanyotherbattery
packsmaycreateariskofinjuryandre.
3. When battery pack is not in use, keep it away
from other metal objects, like paper clips,
coins, keys, nails, screws or other small metal
objects, that can make a connection from one
terminal to another.Shortingthebatterytermi-
nalstogethermaycauseburnsorare.
4.
Under abusive conditions, liquid may be ejected
from the battery; avoid contact. If contact acci-
dentally occurs, ush with water. If liquid con-
tacts eyes, additionally seek medical help. Liquid
ejectedfromthebatterymaycauseirritationorburns.
5. Do not use a battery pack or tool that is dam-
aged or modied.Damagedormodiedbatteries
mayexhibitunpredictablebehaviourresultingin
re,explosionorriskofinjury.
6. Do not expose a battery pack or tool to re or
excessive temperature.Exposuretoreortem-
peratureabove130°Cmaycauseexplosion.
7. Follow all charging instructions and do not
charge the battery pack or tool outside the
temperature range specied in the instruc-
tions.Chargingimproperlyorattemperatures
outsidethespeciedrangemaydamagethe
batteryandincreasetheriskofre.
Service
1.
Have your power tool serviced by a qualied repair
person using only identical replacement parts. This
willensurethatthesafetyofthepowertoolismaintained.
2. Never service damaged battery packs. Service
ofbatterypacksshouldonlybeperformedbythe
manufacturer or authorized service providers.
3. Follow instruction for lubricating and chang-
ing accessories.
Cordless impact wrench safety warnings
1. Hold the power tool by insulated gripping surfaces,
when performing an operation where the fastener
may contact hidden wiring. Fasteners contacting a
"live"wiremaymakeexposedmetalpartsofthepower
tool "live" and could give the operator an electric shock.
2. Wear ear protectors.
3. Check the impact socket carefully for wear,
cracks or damage before installation.
4. Hold the tool rmly.
5. Keep hands away from rotating parts.
6. Do not touch the impact socket, bolt, nut or the
workpiece immediately after operation.They
maybeextremelyhotandcouldburnyourskin.
7. Always be sure you have a rm footing.
Be sure no one is below when using the tool in
high locations.
8. The proper fastening torque may differ
depending upon the kind or size of the bolt.
Check the torque with a torque wrench.
SAVE THESE INSTRUCTIONS.

5ENGLISH
WARNING: DO NOT let comfort or familiarity
with product (gained from repeated use) replace strict
adherence to safety rules for the subject product.
MISUSE or failure to follow the safety rules stated in this
instruction manual may cause serious personal injury.
Important safety instructions for
battery cartridge
1. Before using battery cartridge, read all instruc-
tions and cautionary markings on (1) battery
charger, (2) battery, and (3) product using battery.
2. Do not disassemble battery cartridge.
3. If operating time has become excessively
shorter, stop operating immediately. It may
result in a risk of overheating, possible burns
and even an explosion.
4.
If electrolyte gets into your eyes, rinse them out
with clear water and seek medical attention right
away. It may result in loss of your eyesight.
5. Do not short the battery cartridge:
(1) Do not touch the terminals with any con-
ductive material.
(2) Avoid storing battery cartridge in a con-
tainer with other metal objects such as
nails, coins, etc.
(3) Do not expose battery cartridge to water
or rain.
A battery short can cause a large current
ow, overheating, possible burns and even a
breakdown.
6. Do not store the tool and battery cartridge in
locations where the temperature may reach or
exceed 50 °C (122 °F).
7. Do not incinerate the battery cartridge even if
it is severely damaged or is completely worn
out. The battery cartridge can explode in a re.
8. Be careful not to drop or strike battery.
9. Do not use a damaged battery.
10.
The contained lithium-ion batteries are subject to
the Dangerous Goods Legislation requirements.
Forcommercialtransportse.g.bythirdparties,
forwarding agents, special requirement on pack-
aging and labeling must be observed.
For preparation of the item being shipped, consult-
ing an expert for hazardous material is required.
Pleasealsoobservepossiblymoredetailed
national regulations.
Tape or mask off open contacts and pack up the
batteryinsuchamannerthatitcannotmove
around in the packaging.
11. When disposing the battery cartridge, remove
it from the tool and dispose of it in a safe
place. Follow your local regulations relating to
disposal of battery.
12. Use the batteries only with the products
specied by Makita. Installing the batteries to
non-compliantproductsmayresultinare,exces-
siveheat,explosion,orleakofelectrolyte.
13. If the tool is not used for a long period of time,
the battery must be removed from the tool.
SAVE THESE INSTRUCTIONS.
CAUTION: Only use genuine Makita batteries.
Use of non-genuine Makita batteries, or batteries that
havebeenaltered,mayresultinthebatterybursting
causingres,personalinjuryanddamage.Itwillalso
voidtheMakitawarrantyfortheMakitatoolandcharger.
Tips for maintaining maximum
battery life
1. Charge the battery cartridge before completely dis-
charged. Always stop tool operation and charge the
battery cartridge when you notice less tool power.
2. Never recharge a fully charged battery cartridge.
Overcharging shortens the battery service life.
3. Charge the battery cartridge with room tempera-
ture at 10 °C - 40 °C (50 °F - 104 °F). Let a hot
battery cartridge cool down before charging it.
4. Charge the battery cartridge if you do not use
it for a long period (more than six months).
FUNCTIONAL DESCRIPTION
CAUTION:
• Alwaysbesurethatthetoolisswitchedoffand
thebatterycartridgeisremovedbeforeadjust-
ing or checking function on the tool.
Installing or removing battery cartridge
1
2
3
►1. Red part 2. Button 3.Batterycartridge
• Alwaysswitchoffthetoolbeforeinstallationor
removalofthebatterycartridge.
•
Toremovethebatterycartridge,withdrawitfromthe
tool while sliding the button on the front of the cartridge.
• Toinsertthebatterycartridge,alignthetongue
onthebatterycartridgewiththegrooveinthe
housingandslipitintoplace.Alwaysinsertitall
thewayuntilitlocksinplacewithalittleclick.If
youcanseetheredpartontheuppersideofthe
button,itisnotlockedcompletely.Insertitfully
untiltheredpartcannotbeseen.Ifnot,itmay
accidentallyfalloutofthetool,causinginjuryto
youorsomeonearoundyou.
• Donotuseforcewheninsertingthebatterycar-
tridge.Ifthecartridgedoesnotslideineasily,itis
notbeinginsertedcorrectly.

6ENGLISH
Indicating the remaining battery
capacity
Only for battery cartridges with the indicator
1
2
►1. Indicator lamps 2. Check button
Pressthecheckbuttononthebatterycartridgetoindi-
catetheremainingbatterycapacity.Theindicatorlamps
light up for a few seconds.
Indicator lamps Remaining
capacity
Lighted Off Blinking
75% to 100%
50% to 75%
25% to 50%
0% to 25%
Charge the
battery.
Thebattery
mayhave
malfunctioned.
NOTE: Depending on the conditions of use and the
ambienttemperature,theindicationmaydifferslightly
fromtheactualcapacity.
Switch action
1
A
B
►1. Switch trigger
CAUTION:
• Beforeinsertingthebatterycartridgeintothe
tool,alwayschecktoseethattheswitchtrigger
actuatesproperlyandreturnstothe"OFF"
position when released.
• Changethedirectionofrotationonlywhenthe
tool comes to a complete stop. Changing it
beforethetoolstopsmaydamagethetool.
The switch is reversible, providing either clockwise or
counterclockwiserotation.Tostartthetool,simplypull
the lower part (A) of the switch trigger for clockwise or
the upper part (B) for counterclockwise. Release the
switch trigger to stop.
Lighting up the front lamp
1
2
►1. Lamp 2. Lamp switch
CAUTION:
• Do not look in the light or see the source of light
directly.
Push the upper position of the lamp switch for turning
on the light and the lower position for off.

7ENGLISH
NOTE:
• Useadryclothtowipethedirtoffthelensof
lamp. Be careful not to scratch the lens of lamp,
oritmaylowertheillumination.
•
The light is provided with anti excessive discharge
circuit. When the lamp does not light up even after
thelightswitchisturnedon,thereislikelytobebat-
terypowerdrop.Trytochargethebatterycartridge.
• Keepthelampswitchin"off"positionwhilenot
in need of the light.
ASSEMBLY
CAUTION:
• Alwaysbesurethatthetoolisswitchedoffand
thebatterycartridgeisremovedbeforecarrying
outanyworkonthetool.
Selecting correct socket
Alwaysusethecorrectsizesocketforboltsandnuts.An
incorrect size socket will result in inaccurate and incon-
sistent fastening torque and/or damage to the bolt or nut.
Installing or removing impact socket
Optional accessory
CAUTION: Make sure that the impact socket
and the mounting portion are not damaged before
installing the impact socket.
CAUTION: After inserting the impact socket,
make sure that it is rmly secured. If it comes out,
do not use it.
NOTE:Thewayofimpactsocketinstallationvaries
dependingonthetypeofthesquaredriveonthetool.
Tool with the ring spring
For impact socket without O-ring and pin
1
3
2
►1. Impact socket 2. Square drive 3. Ring spring
Push the impact socket onto the square drive until it
locks into place.
Toremovetheimpactsocket,simplypullitoff.
For impact socket with O-ring and pin
1
2
3
►1. Impact socket 2. O-ring 3. Pin
Move the O-ring out of the groove in the impact socket
and remove the pin from the impact socket. Fit the
impact socket onto the square drive so that the hole in
the impact socket is aligned with the hole in the square
drive.
Insert the pin through the hole in the impact socket and
square drive. Then return the O-ring to the original posi-
tion in the impact socket groove to retain the pin.
To remove the impact socket, follow the installation
procedures in reverse.
Tool with the detent pin
1
2
3
4
►1. Impact socket 2. Hole 3. Square drive 4. Detent
pin
Align the hole in the side of the impact socket with the
detent pin on the square drive and push the impact
socket onto the square drive until it locks into place. Tap
itlightlyifrequired.
Toremovetheimpactsocket,simplypullitoff.Ifitis
hard to remove, depress the detent pin while pulling the
impact socket.

8ENGLISH
Hook
CAUTION: After installing the hook, make sure
thatitisscrewedrmly.
1
2
3
►1. Groove 2. Screw 3. Hook
Thehookisconvenientfortemporarilyhangingthetool.
This can be installed on either side of the tool.
To install the hook, insert it into a groove in the tool
housing on either side and then secure it with a screw.
To remove, loosen the screw and then take it out.
OPERATION
CAUTION:
• Alwaysinsertthebatterycartridgealltheway
untilitlocksinplace.Ifyoucanseetheredpart
on the upper side of the button, it is not locked
completely.Insertitfullyuntiltheredpartcannot
beseen.Ifnot,itmayaccidentallyfalloutofthe
tool,causinginjurytoyouorsomeonearound
you.
Holdthetoolrmlyandplacethesocketovertheboltor
nut. Turn the tool on and fasten for the proper fastening
time.
Theproperfasteningtorquemaydifferdependingupon
the kind or size of the bolt, the material of the workpiece
to be fastened, etc. The relation between fastening
torqueandfasteningtimeisshowninthegures.
100
200
300
01
23
(3,060)
(2,040)
(1,020)
M20
(M20)
M16 (M16)
M12 (M12)
N m
Fastening time(S)
Standrad bolt
(kgf cm)
Proper fastening torque
Fastening torque
100
200
300
0123
(3,060)
(2,040)
(1,020)
M16
(M16)
M12
(M12)
N m
Fastening time(S)
High tensile bolt
(kgf cm)
Proper fastening torque
Fastening torque
M14
(M14)
NOTE:
• Hold the tool pointed straight at the bolt or nut.
• Excessivefasteningtorquemaydamagethe
bolt/nutorsocket.Beforestartingyourjob,
alwaysperformatestoperationtodeterminethe
properfasteningtimeforyourboltornut.
• Ifthetoolisoperatedcontinuouslyuntilthe
batterycartridgehasdischarged,allowthetool
to rest for 15 minutes before proceeding with a
freshbatterycartridge.
Thefasteningtorqueisaffectedbyawidevarietyof
factorsincludingthefollowing.Afterfastening,always
check the torque with a torque wrench.
1. Whenthebatterycartridgeisdischargedalmost
completely,voltagewilldropandthefastening
torque will be reduced.

9ENGLISH
2. Socket
• Failure to use the correct size socket will
cause a reduction in the fastening torque.
• A worn socket (wear on the hex end or
square end) will cause a reduction in the
fastening torque.
3. Bolt
• Eventhoughthetorquecoefcientandthe
class of bolt are the same, the proper fasten-
ing torque will differ according to the diame-
ter of bolt.
• Even though the diameters of bolts are the
same, the proper fastening torque will differ
accordingtothetorquecoefcient,theclass
of bolt and the bolt length.
4. Theuseoftheuniversaljointortheextension
bar somewhat reduces the fastening force of the
impactwrench.Compensatebyfasteningfora
longer period of time.
5. The manner of holding the tool or the material
of driving position to be fastened will affect the
torque.
6. Operating the tool at low speed will cause a reduc-
tion in the fastening torque.
MAINTENANCE
CAUTION:
• Alwaysbesurethatthetoolisswitchedoffand
thebatterycartridgeisremovedbeforeattempt-
ing to perform inspection or maintenance.
• Never use gasoline, benzine, thinner, alcohol
or the like. Discoloration, deformation or cracks
mayresult.
Replacing carbon brushes
1
►1. Limit mark
Removeandcheckthecarbonbrushesregularly.
Replacewhentheyweardowntothelimitmark.Keep
the carbon brushes clean and free to slip in the holders.
Both carbon brushes should be replaced at the same
time.Useonlyidenticalcarbonbrushes.
Use a screwdriver to remove the brush holder caps.
Take out the worn carbon brushes, insert the new ones
and secure the brush holder caps.
1
2
►1. Brush holder cap 2. Screwdriver
To maintain product SAFETY and RELIABILITY, repairs,
anyothermaintenanceoradjustmentshouldbeper-
formedbyMakitaAuthorizedServiceCenters,always
using Makita replacement parts.
OPTIONAL
ACCESSORIES
CAUTION:
• These accessories or attachments are recom-
mendedforusewithyourMakitatoolspecied
inthismanual.Theuseofanyotheraccessories
orattachmentsmightpresentariskofinjuryto
persons.Onlyuseaccessoryorattachmentfor
its stated purpose.
Ifyouneedanyassistanceformoredetailsregard-
ingtheseaccessories,askyourlocalMakitaService
Center.
• Sockets
• Extension bar
• Universaljoint
• Bit adapter
• Makitagenuinebatteryandcharger
NOTE:
• Someitemsinthelistmaybeincludedinthe
toolpackageasstandardaccessories.They
maydifferfromcountrytocountry.

10

11

www.makita.com
Makita Europe N.V.
Makita Corporation
3-11-8, Sumiyoshi-cho,
Anjo, Aichi 446-8502 Japa
n
Jan-Baptist Vinkstraat 2,
3070 Kortenberg, Belgium
885280C223
EN
20190412