DTW450RMJ - Screwdriver MAKITA - Free user manual and instructions

Brand	Makita
Model	DTW450RMJ
Product type	Cordless impact driver
Power supply	18 V lithium-ion battery (not included)
Max torque	450 Nm
No-load speed	0-2200 rpm
Impact rate	0-3200 ipm
Chuck	1/4" hexagonal (6.35 mm)
Dimensions (L x W x H)	152 x 79 x 248 mm
Weight (without battery)	1.7 kg
Main functions	Tightening and loosening screws, bolts, nuts
Speed control	Progressive electronic trigger
Compatible bits	Standard 1/4" hexagonal bits
LED lighting	Yes, with delayed extinction
Maintenance and cleaning	Clean with a dry cloth; avoid solvents
Safety	Motor brake; trigger lock
Spare parts and repairability	Repairability score 8.4/10; parts available
Warranty	2 years (subject to conditions)
Box contents	Impact driver, screwdriver bit, charger (depending on version)

Frequently Asked Questions - DTW450RMJ MAKITA

Which batteries are compatible with the Makita DTW450RMJ?

The DTW450RMJ uses Makita 18 V LXT batteries (BL1815, BL1820, BL1830, BL1840, BL1850 series, etc.).

How to adjust the speed on the DTW450RMJ?

The speed is controlled by the progressive electronic trigger: the more you press, the higher the speed.

Can standard screwdriver bits be used?

Yes, the chuck accepts all standard 1/4" hexagonal bits (6.35 mm).

How to clean the DTW450RMJ impact driver?

Use a soft dry cloth. Do not use solvents or water.

Is the motor brake active immediately?

Yes, the electric brake quickly stops the bit as soon as you release the trigger.

What is the maximum torque of the DTW450RMJ?

The maximum torque is 450 Nm, ideal for intensive screwdriving applications.

Does the DTW450RMJ have an LED light?

Yes, it is equipped with an integrated LED with afterglow delay, useful in dark areas.

What is the weight of the impact driver without battery?

The weight is approximately 1.7 kg (without battery).

How to change the bit on the DTW450RMJ?

Simply pull the locking collar forward to insert or remove the bit.

Is the impact driver delivered with a charger?

The DTW450RMJ model is usually sold as a bare tool (without battery or charger). Check the box contents.

USER MANUAL DTW450RMJ MAKITA

GB Cordless Impact Wrench Instruction manual

Line drawing of a handheld electric drill press (no text or symbols)

1 008146 2 015659

3 008147 4 008407

5 1087001 6 008149

7 1087002 8 008150

Line drawing of a hand using a handheld electric drill (no text or symbols)

9 008151

10 008486 11 008487

Pure mechanical diagram of a spring-loaded component with no text or symbols

12 001145 13 008152

ENGLISH (Original instructions)
Explanation of general view

1. Red part	10. Square drive	19. Standrad bolt
2. Button	11. Ring spring	20. Fastening torque
3. Battery cartridge	12. O-ring	21. Proper fastening torque
4. Indicator lamps	13. Pin	22. Fastening time (S)
5. Check button	14. Hole	23. High tensile bolt
6. Switch trigger	15. Detent pin	24. Limit mark
7. Lamp	16. Groove	25. Brush holder cap
8. Lamp switch	17. Screw	26. Screwdriver
9. Impact socket	18. Hook

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 specifications herein are subject to change without notice.

- Specifications may differ from country to country.

- The net weight value includes the lightest and heaviest combination of the attachment(s) for normal and safe use and battery cartridge(s) which are specified in the instruction manual.

Applicable battery cartridge and charger

Battery cartridge	BL1815N/BL1820B/BL1830B/BL1840B/BL1850B/BL1860B
Charger	DC18RC/DC18RD/DC18RE/DC18SD/DC18SE/DC18SF/DC18SH/DC18WC

• 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

ENE036-1

The tool is intended for fastening bolts and nuts.

General power tool safety warnings

GEA010-3

WARNING: Read all safety warnings, instructions, strations and specifications provided with this over tool. Failure to follow all instructions listed below y result in electric shock, fire and/or serious injury.

Save all warnings and instructions 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 GEB

GEB138-3

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. 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 firm footing.

Be sure no one is below when using the tool in high locations.

1. The proper fastening torque may differ depending upon the kind or size of the bolt. Check the torque with a torque wrench.
2. Make sure there are no electrical cables, water pipes, gas pipes etc. that could cause a hazard if damaged by use of the tool.

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 ENC007-18

1. Before using battery cartridge, read all instructions and cautionary markings on (1) battery charger, (2) battery, and (3) product using battery.
2. Do not disassemble or tamper with the battery cartridge. It may result in a fire, excessive heat, or explosion.
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 conductive material.
(2) Avoid storing battery cartridge in a container 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 flow, overheating, possible burns and even a breakdown.

1. Do not store and use the tool and battery cartridge in locations where the temperature may reach or exceed 50 °C (122 °F).
2. 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.
3. Do not nail, cut, crush, throw, drop the battery cartridge, or hit against a hard object to the battery cartridge. Such conduct may result in a fire, excessive heat, or explosion.
4. Do not use a damaged battery.
5. 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 packaging and labeling must be observed.

For preparation of the item being shipped, consulting 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.

1. 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.
2. Use the batteries only with the products specified by Makita. Installing the batteries to non-compliant products may result in a fire, excessive heat, explosion, or leak of electrolyte.
3. If the tool is not used for a long period of time, the battery must be removed from the tool.
4. During and after use, the battery cartridge may take on heat which can cause burns or low temperature burns. Pay attention to the handling of hot battery cartridges.
5. Do not touch the terminal of the tool immediately after use as it may get hot enough to cause burns.
6. Do not allow chips, dust, or soil stuck into the terminals, holes, and grooves of the battery cartridge. It may cause heating, catching fire, burst and malfunction of the tool or battery cartridge, resulting in burns or personal injury.
7. Unless the tool supports the use near high-voltage electrical power lines, do not use the battery cartridge near high-voltage electrical power lines. It may result in a malfunction or breakdown of the tool or battery cartridge.
8. Keep the battery away from children.

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.

NOTICE:

- Makita is not responsible for any accidents resulting from the use of non-genuine Makita batteries or batteries that have been modified. Genuine Makita batteries have been rigorously evaluated for compatibility with Makita tools and chargers, in line with applicable legislation and safety standards.

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 cartridge. Overcharging shortens the battery service life.
3. Charge the battery cartridge with room temperature at 10 °C - 40 °C (50 °F - 104 °F). Let a hot battery cartridge cool down before charging it.
4. When not using the battery cartridge, remove it from the tool or the charger.
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 (Fig. 1)

• 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 cartridge. If the cartridge does not slide in easily, it is not being inserted correctly.

Indicating the remaining battery capacity

Only for battery cartridges with the indicator (Fig. 2)

Press the check button on the battery cartridge to indicate 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.
• The first (far left) indicator lamp will blink when the battery protection system works.

Switch action (Fig. 3)

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 (Fig. 4)

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.

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 battery 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 inconsistent fastening torque and/or damage to the bolt or nut.

Installing or removing impact socket

Country specific

CAUTION:

• Make sure that the impact socket and the mounting portion are not damaged before installing the impact socket.
• After inserting the impact socket, make sure that it is firmly secured. If it comes out, do not use it.

Tool with the ring spring

For impact socket without O-ring and pin (Fig. 5)

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. 6)

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 (Fig. 7)

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.

Hook

CAUTION:

After installing the hook, make sure that it is screwed firmly. (Fig. 8)

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 firmly and place the socket over the bolt or nut. Turn the tool on and fasten for the proper fastening time. (Fig. 9)

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. (Fig. 10 & 11)

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.

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 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.
• 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.
• The manner of holding the tool or the material of driving position to be fastened will affect the torque.
• Operating the tool at low speed will cause a reduction 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.
- Never use gasoline, benzine, thinner, alcohol or the like. Discoloration, deformation or cracks may result.

Replacing carbon brushes (Fig. 12)

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. (Fig. 13)

To maintain product SAFETY and RELIABILITY, repairs, any other maintenance or adjustment should be performed by Makita Authorized 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 regarding 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.

Noise

The typical A-weighted noise level determined according to EN62841-2-2:

Sound pressure level (LpA): 97 dB (A)

Sound power level ( L_WA ): 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.
• The declared noise emission value(s) can also be used in a preliminary assessment of exposure.

WARNING:

- Wear ear protection.

• The noise emission during actual use of the power tool can differ from the declared total value(s) depending on the ways in which the tool is used.
• Be sure to identify safety measures 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 continuous vibration total value (tri-axial vector sum) determined according to EN62841-2-2:

Work mode: impact tightening of fasteners of the maximum capacity of the tool Vibration emission ( a_h ): 19 m/s ^2 Uncertainty (K): 1.5 m/s ^2

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.
• The declared vibration total value(s) can 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 total value(s) depending on the ways in which the tool is used.
• Be sure to identify safety measures 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).

The following shows the mean values of the peak amplitude of the acceleration from repeated shock vibrations, p_F , with corresponding uncertainty (K) determined according to EN62841-2-2.

Work mode: impact tightening of fasteners of the maximum capacity of the tool p_F : 1673 m/s ^2 Uncertainty (K): 240 m/s ^2

NOTE:

• These declared values should not be used to determine hand arm vibration exposure.

Declarations of Conformity

For European countries only

The EU Declaration of Conformity can be accessed from the following URL.

https://support.makita.biz/doc/doc_index.html

For the UK

The Declaration of conformity is included in Annex A to this instruction manual.

Batterie	BL1815N/BL1820B/BL1830B/BL1840B/BL1850B/BL1860B
Chargeur	DC18RC/DC18RD/DC18RE/DC18SD/DC18SE/DC18SF/DC18SH/DC18WC

Batteria	BL1815N/BL1820B/BL1830B/BL1840B/BL1850B/BL1860B
Caricatore	DC18RC/DC18RD/DC18RE/DC18SD/DC18SE/DC18SF/DC18SH/DC18WC

Accu	BL1815N/BL1820B/BL1830B/BL1840B/BL1850B/BL1860B
Acculader	DC18RC/DC18RD/DC18RE/DC18SD/DC18SE/DC18SF/DC18SH/DC18WC

⚠ WAARSCHUWING: Lees alle

Bateria	BL1815N/BL1820B/BL1830B/BL1840B/BL1850B/BL1860B
Carregador	DC18RC/DC18RD/DC18RE/DC18SD/DC18SE/DC18SF/DC18SH/DC18WC