makita DTW181 18v Brushless Impact Wrench Instruction Manual

Makita DTW181 18v Brushless Impact Wrench

SPECIFICATIONS

• Due to our continuing program of research and development, the specifications herein are subject to change without notice.
• Specifications 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 fire.

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) : 95 dB(A)
• Sound power level (LWA) : 106 dB (A)
• Uncertainty (K) : 3 dB(A)

WARNING: Wear ear protection.

Vibration

The vibration total value (tri-axial vector sum) deter- mined according to EN62841-2-2:

• Work mode: impact tightening of fasteners of the maxi-mum capacity of the tool
• Vibration emission (ah) : 10.5 m/s2
• Uncertainty (K) : 1.5 m/s2

NOTE: The declared vibration emission value has been measured in accordance with the standard test method and may be used for comparing one tool with another.
NOTE: The declared vibration emission value 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 emission value depending on the ways in which the tool is used.
WARNING: Be sure to identify safety measures to protect the operator that are based on an estima- tion 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.

SAFETY WARNINGS

General power tool safety warnings

• WARNING: Read all safety warnings, instruc-tions, illustrations and specifications provided with this power tool. Failure to follow all instructions listed below may result in electric shock, fire 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.

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 firmly.

5. Keep hands away from rotating parts.

6. Always be sure you have a firm footing.
   Be sure no one is below when using the tool in high locations.

7. 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.

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 atten-tion right away. It may result in loss of your eyesight.

5. Do not short the battery cartridge:

6. Do not touch the terminals with any con-ductive material.

7. Avoid storing battery cartridge in a con-tainer with other metal objects such as nails, coins, etc.

8. Do not expose battery cartridge to water or rain.
   A battery short can cause a large current flow, overheating, possible burns and even a breakdown.

9. Do not store the tool and battery cartridge in locations where the temperature may reach or exceed 50 °C (122 °F).

10. Do not incinerate the battery cartridge even if it is severely damaged or is completely worn out. The battery cartridge can explode in a fire.

11. Be careful not to drop or strike battery.

12. Do not use a damaged battery.

13. The contained lithium-ion batteries are subject to the Dangerous Goods Legislation requirements.
    For commercial transports e.g. by third parties, or forwarding agents, the special requirements 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.

14. Follow your local regulations relating to disposal of battery.

15. Use the batteries only with the products specified by Makita. Installing the batteries to non-compliant products may result in a fire, exces-sive heat, explosion, or leak of electrolyte.

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 fires, personal injury and damage. It will also void the Makita warranty for the Makita tool and charger.F

Tips for maintaining maximum battery life

1. Charge the battery cartridge before completely discharged. Always stop tool operation and charge the battery cartridge when you notice less tool power.
2. Never recharge a fully charged battery car-tridge. Overcharging shortens the battery service life.
3. Charge the battery cartridge with room tem-perature at 10 °C – 40 °C (50 °F – 104 °F). Let
4. hot battery cartridge cool down before charging it.
5. 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 adjusting or checking function on the tool.

Installing or removing battery cartridge

CAUTION : Always switch off the tool before installing or removing of the battery cartridge.
CAUTION : Hold the tool and the battery car-tridge firmly when installing or removing battery cartridge. Failure to hold the tool and the battery cartridge firmly may cause them to slip off your hands and result in damage to the tool and battery cartridge and a personal injury.
Fig.1 : 1. Red indicator 2. Button 3. Battery cartridge

To remove the battery cartridge, slide it from the toolwhile sliding the button on the front of the cartridge.
To install the battery cartridge, align the tongue on the battery cartridge with the groove in the housing and slip it into place. Insert it all the way until it locks in place with a little click. If you can see the red indicator on the upper side of the button, it is not locked completely.

• CAUTION: Always install the battery cartridge fully until the red indicator cannot be seen. If not, it may accidentally fall out of the tool, causing injury to you or someone around you.
• CAUTION: Do not install the battery cartridge forcibly. If the cartridge does not slide in easily, it is not being inserted correctly.

Tool / battery protection system

The tool is equipped with a tool/battery protection sys-tem. This system automatically cuts off power to the motor to extend tool and battery life. The tool will auto-matically stop during operation if the tool or battery is
placed under one of the following conditions:

Overload protection
When the battery is operated in a manner that causes it to draw an abnormally high current, the tool automat-ically stops without any indication. In this situation, turn
the tool off and stop the application that caused the tool to become overloaded. Then turn the tool on to restart.

Overheat protection
When the tool/battery is overheated, the tool stops automatically. In this situation, let the tool/battery cool
before turning the tool on again.

Over-discharge protection
When the battery capacity is not enough, the tool stops automatically. In this case, remove the battery from the tool and charge the battery.

Indicating the remaining battery capacity

Only for battery cartridges with the indicator
Fig.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.
NOTE: Depending on the conditions of use and the ambient temperature, the indication may differ slightly from the actual capacity.

Switch action
Fig.3: 1. Switch trigger

• CAUTION: Before installing the battery car-tridge into the tool, always check to see that the switch trigger actuates properly and returns to the “OFF” position when released.
  To start the tool, simply pull the switch trigger. Tool speed is increased by increasing pressure on the switch trigger. Release the switch trigger to stop.

• NOTE: The tool automatically stops if you keep pull- ing the switch trigger for about 6 minutes.

Lighting up the front lamp

CAUTION: Do not look in the light or see the source of light directly.

• Fig.4: 1. Lamp
• Fig.5: 1. Button

Pull the switch trigger to turn on the lamp. To turn off, release it. The lamp goes out approximately 10 seconds after releasing the switch trigger. To keep the lamp off, turn off the lamp status. First pull and release the switch trigger. And then press the but-ton for one second within 10 seconds. To turn on the lamp status again, press the button again similarly.

• NOTE: To confirm the lamp status, pull the trigger. When the lamp lights up by pulling the switch trigger, the lamp status is ON. When the lamp does not come on, the lamp status is OFF.
• NOTE: When the tool is overheated, the light flashes for one minute, and then the LED display goes off. In this case, cool down the tool before operating again.
• NOTE: Use a dry cloth to wipe the dirt off the lens of the lamp. Be careful not to scratch the lens of lamp, or it may lower the illumination.

Reversing switch action
Fig.6: 1. Reversing switch lever

• CAUTION: Always check the direction of rotation before operation.
• CAUTION: Use the reversing switch only after the tool comes to a complete stop. Changing the direction of rotation before the tool stops may dam- age the tool.
• CAUTION: When not operating the tool, always set the reversing switch lever to the neu-tral position.

This tool has a reversing switch to change the direction of rotation. Depress the reversing switch lever from the A side for clockwise rotation or from the B side for coun-terclockwise rotation.
When the reversing switch lever is in the neutral posi-tion, the switch trigger cannot be pulled.

Changing the impact force

Fig.7: 1. Hard 2. Soft 3. Reverse rotation auto stop mode 4. Changed in three steps 5. Button

You can change the impact force in three steps: hard, soft, and Reverse rotation auto stop mode. This allows a tightening suitable to the work. Every time the button is pressed, the number of blows changes in three steps. The function of Reverse rotation auto stop mode works only with pulling the trigger fully in counterclockwise tool rotation. When the bolt/nut gets enough loosened, the tool stops the impact and rotation. For approximately one minute after releasing the switch trigger, the impact force can be changed.

Impact force grade displayed

on panel

| Maximum blows| Purpose| Example of application
---|---|---|---
Hard| 3,600 min-1 (/min)| Tightening when force and speed are desired.| Assembling steel frames.
Soft| 2,000 min-1 (/min)| Tightening when you need fine adjustment with small diameter bolt.| Assembling furniture.
Reverse rotation auto stop mode| 3,600 min-1 (/min)| Loosening with auto stop function.| Disassembling bolts/nuts.

• NOTE: Reverse rotation auto stop mode is available only when the tool rotates counterclockwise. When rotating clockwise in Reverse rotation auto stop mode, the impact force and speed are the same as Hard impact mode.
• NOTE: When all lamps on the switch panel go out, the tool is turned off to save the battery power. The impact force grade can be checked by pulling the switch trigger to the extent that the tool does not operate.
• NOTE: While pulling the switch trigger, the impact force grade cannot be changed.

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 impact socket
Always use the correct size impact socket for bolts and nuts. An incorrect size impact socket will result in inac- curate and inconsistent 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 firmly 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

Fig.8: 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

Fig.9: 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

Fig.10:   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.

Installing hook

CAUTION: When installing the hook, always secure it with the screw firmly. If not, the hook may come off from the tool and result in the personal injury.

Fig.11: 1. Groove 2. Hook 3. Screw
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 indicator on the upper side of the button, it is not
locked completely. Insert it fully until the red indicator cannot be seen. If not, it may accidentally fall out of the tool, causing injury to you or someone around you.
Fig.12
Hold the tool firmly and place the impact 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 figures. Proper fastening torque for standard bolt

Proper fastening torque for standard bolt

Proper fastening torque for high tensile bolt

• NOTE: Hold the tool pointed straight at the bolt or nut.
• NOTE: Excessive fastening torque may damage the bolt/nut or impact socket. Before starting your job, always perform a test operation to determine the proper fastening time for your bolt or nut.
• NOTE: If the tool is operated continuously until the bat-tery 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.
2. Impact socket
   • Failure to use the correct size impact socket will cause a reduction in the fastening torque.
   • A worn impact socket (wear on the hex end or square end) will cause a reduction in the fastening torque.
3. Bolt
   • Even though the torque coefficient and the class of bolt are the same, the proper fastening torque will differ according to the diameter of bolt.
   • Even though the diameters of bolts are the same, the proper fastening torque will differ according to the torque coefficient, the class of bolt and the bolt length.
4. The use of the universal joint or the extension bar some-what 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 attempting to perform inspection or maintenance.
NOTICE: Never use gasoline, benzine, thinner, alcohol or the like. Discoloration, deformation or cracks may result.

To maintain product SAFETY and RELIABILITY,
repairs, any other maintenance or adjustment should be performed by Makita Authorized or Factory Service Centers, always using Makita replacement parts.

OPTIONAL ACCESSORIES

CAUTION : These accessories or attachments are recommended for use with your Makita tool specified 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.

• Impact socket
• Extension bar
• Universal joint
• Socket bit adapter
• Plastic carrying case
• 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.

References

• MAKITA Industrial Power Tools - The Leader In Cordless with 18V LXT Lithium-Ion

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