Makita DTW181 Cordless Impact Wrench

Specifications

Specifications are subject to change without notice and may differ by country.

Applicable battery cartridge and charger

Battery cartridge: BL1815N / BL1820 / BL1820B / BL1830 / BL1830B / BL1840 / BL1840B / BL1850 / BL1850B / BL1860B

Charger: DC18RC / DC18RD / DC18RE / DC18SD / DC18SE / DC18SF

WARNING: Only use the listed battery cartridges and chargers. Using others may cause injury or fire.

Symbols

Read instruction manual: ?

Only for EU countries: Do not dispose of electric equipment or battery pack with household waste.

WARNING: Wear ear protection. ?

WARNING: Be sure to identify safety measures to protect the operator.

Intended use

The tool is intended for fastening bolts and nuts.

Noise

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

NOTE: Declared noise emission values are for comparison and preliminary assessment.

Vibration

Vibration emission (a): 10.5 m/s²
Uncertainty (K): 1.5 m/s²

NOTE: Declared vibration total values are for comparison and preliminary assessment.

WARNING: Vibration emission during use may differ based on workpiece and usage.

WARNING: Identify safety measures based on exposure estimation.

SAFETY WARNINGS

General power tool safety warnings

WARNING: Read all safety warnings, instructions, illustrations and specifications. Failure to follow all instructions may result in electric shock, fire and/or serious injury.

Keep all warnings and instructions for future reference.

The term "power tool" refers to mains-operated or battery-operated power tools.

Work area safety

1. Keep work area clean and well lit.
2. Do not operate power tools in explosive atmospheres.
3. Keep children and bystanders away.

Electrical safety

1. Match outlet to plug. Do not modify the plug.
2. Avoid body contact with earthed surfaces.
3. Do not expose power tools to rain or wet conditions.

Battery tool use and care

1. Do not force the power tool. Use the correct tool for the application.
2. Do not use the power tool if the switch does not turn it on and off.
3. Disconnect the plug/remove battery before making adjustments or changing accessories.
4. Store idle power tools out of reach of children.
5. Maintain power tools and accessories. Check for misalignment or binding of parts.
6. Keep cutting tools sharp and clean.
7. Use the power tool, accessories, and tool bits according to instructions.
8. Keep handles and grasping surfaces dry, clean and free from oil and grease.
9. Do not wear cloth work gloves which may be entangled.

Battery tool use and care

1. Recharge only with the specified charger.
2. Use power tools only with specifically designated battery packs.
3. Keep battery pack away from metal objects.
4. Avoid abusive conditions, liquid may be ejected from the battery.
5. Do not use a damaged or modified battery pack or tool.
6. Do not expose a battery pack or tool to fire or excessive temperature.
7. Follow all charging instructions and do not charge outside the specified temperature range.

Service

1. Have your power tool serviced by a qualified repair person using identical replacement parts.
2. Never service damaged battery packs.
3. Follow instructions for lubricating and changing accessories.

Cordless impact wrench safety warnings

1. Hold the power tool by insulated gripping surfaces.
2. Check the impact socket carefully for wear, cracks or damage.
3. Wear ear protectors. ?
4. Hold the tool firmly.
5. Keep hands away from rotating parts.
6. Do not touch the impact socket, bolt, nut or the workpiece immediately after operation as they may be hot.
7. Always be sure you have a firm footing.
8. Be sure no one is below when using the tool in high locations.
9. The proper fastening torque may differ depending upon the kind or size of the bolt. Check the torque with a torque wrench.

Tips for maintaining maximum battery life

1. Charge the battery cartridge before completely discharged.
2. Never recharge a fully charged battery cartridge.
3. Charge the battery cartridge with room temperature at 10 °C - 40 °C (50 °F - 104 °F).
4. Charge the battery cartridge if you do not use it for a long period (more than six months).

FUNCTIONAL DESCRIPTION

Installing or removing battery cartridge

ACAUTION: Always switch off the tool before installing or removing the battery cartridge.

Hold the tool and battery cartridge firmly. Failure to do so may cause them to slip and result in injury.

1. Red indicator 2. Button 3. Battery cartridge

To remove the battery cartridge, slide it from the tool while sliding the button on the front.

To install the battery cartridge, align the tongue with the groove and slip it into place until it locks. If the red indicator is visible, it is not locked completely.

ACAUTION: Always install the battery cartridge fully until the red indicator cannot be seen. If not, it may accidentally fall out, causing injury.

ACAUTION: Do not install the battery cartridge forcibly. If it does not slide in easily, it is not being inserted correctly.

Tool / battery protection system

The tool is equipped with a system that automatically cuts off power to the motor to extend tool and battery life under certain conditions.

Overload protection

The tool stops automatically if it draws an abnormally high current. Turn the tool off and on again to restart.

Overheat protection

The tool stops automatically if it or the battery overheats. Let the tool/battery cool before turning it on again.

Overdischarge protection

The tool stops automatically when the battery capacity is not enough. Remove the battery and charge it.

Indicating the remaining battery capacity

Only for battery cartridges with the indicator

1. Indicator lamps 2. Check button

Press the check button on the battery cartridge to indicate the remaining battery capacity. The indicator lamps light up for a few seconds.

Switch action

1. Switch trigger

ACAUTION: Before installing the battery cartridge, check that the switch trigger actuates properly and returns to the "OFF" position.

To start the tool, pull the switch trigger. Tool speed increases with increased pressure. Release the switch trigger to stop.

NOTE: The tool automatically stops if the switch trigger is held for about 6 minutes.

Lighting up the front lamp

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

1. Lamp

Pull the switch trigger to turn on the lamp. Release it to turn off. 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, then press the button 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. If the lamp lights up, the status is ON. If it does not come on, the status is OFF.

NOTE: When the tool is overheated, the light flashes for one minute, and then the LED display goes off. 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, as it may lower illumination.

Reversing switch action

1. Reversing switch lever

ACAUTION: Always check the direction of rotation before operation.

ACAUTION: Use the reversing switch only after the tool comes to a complete stop. Changing the direction of rotation before the tool stops may damage the tool.

ACAUTION: When not operating the tool, always set the reversing switch lever to the neutral 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 counterclockwise rotation.

When the reversing switch lever is in the neutral position, the switch trigger cannot be pulled.

Changing the impact force

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 tightening suitable to the work.

Every time the button is pressed, the number of blows changes in three steps.

NOTE: Reverse rotation auto stop mode is available only when the tool rotates counterclockwise. When rotating clockwise, 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 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

ACAUTION: 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 inaccurate and inconsistent fastening torque and/or damage to the bolt or nut.

Installing or removing impact socket

Optional accessory

ACAUTION: Make sure that the impact socket and the mounting portion are not damaged before installing the impact socket.

ACAUTION: 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

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. 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 position 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. 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

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

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

ACAUTION: 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.

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

NOTE: Hold the tool pointed straight at the bolt or nut.

NOTE: Excessive fastening torque may damage the bolt/nut or impact socket. Always perform a test operation to determine the proper fastening time.

NOTE: 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. Impact socket.
2. Bolt.
3. The use of the universal joint or the extension bar somewhat reduces the fastening force. Compensate by fastening for a longer period of time.
4. The manner of holding the tool or the material of driving position to be fastened will affect the torque.
5. Operating the tool at low speed will cause a reduction in the fastening torque.

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. Always perform a test operation to determine the proper fastening time.

NOTE: 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. Impact socket.
2. Bolt.
3. The use of the universal joint or the extension bar somewhat reduces the fastening force. Compensate by fastening for a longer period of time.
4. The manner of holding the tool or the material of driving position to be fastened will affect the torque.
5. Operating the tool at low speed will cause a reduction in the fastening torque.

MAINTENANCE

ACAUTION: 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

ACAUTION: 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 regarding 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.