makita DHP446/DHP456 Cordless Hammer Driver Drill Instruction Manual

: June 6, 2024
: Makita

INSTRUCTION MANUAL
Cordless Hammer Driver-Drill
DHP446
DHP456
IMPORTANT: Read Before Using.
011491

(Original instructions)

SPECIFICATIONS

Model	DHP446	DHP456
Capacities	Concrete	13 mm
Steel	13 mm
Wood	38 mm
Wood screw	6 mmx75mm	10 mmx 89 mm
Machine screw	M6
No load speed (min-1)	High (2)
0 1,500	–
Low (1)	0 – 400
Blows per minute	High (2)	0 – 22,500
Low (1)	0 – 6,000
Overall	length	206 mm
Net weight	1.4 kg	1.7 kg
Standard battery bridge	BL1415N	BL1430/
BL1440	BL1815/BL1815N/
BL1820	BL1830/6L1840/

BL1850
Rated voltage| D.C. 14.4 V| D.C. 18 V

Due to our continuing program of research and development, the specifications herein are subject to change without notice.
Specifications and battery cartridges may differ from country to country.
Weight, with battery cartridge, according to EPTA-Procedure 01/2003

Symbols
The following show the symbols used for the equipment.
Be sure that you understand their meaning before use.

Read the instruction manual.
Only for EU countries Do not dispose of electric equipment or battery packs 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 collected separately and returned to an environmentally compatible recycling facility.

Intended use
The tool is intended for impact drilling in brick, concrete, and stone as well as for drilling without impact in wood, metal, ceramic, and plastic.

Noise
The typical A-weighted noise level determined according to EN60745:

Model DHP446

Sound pressure level (LpA) : 80 dB (A)
Uncertainty (K) : 3 dB (A)
The noise level under working may exceed 80 dB (A).

Model DHP456

Sound pressure level (LpA) : 81 dB (A)
Sound power level (LWA) : 92 dB (A)
Uncertainty (K) : 3 dB (A)

Wear ear protection

Vibration
The vibration total value (tri-axial vector sum) determined according to EN60745:

Model DHP446

Work mode: impact drilling into concrete
Vibration emission (ah,ID) : 6.5 m/s 2
Uncertainty (K) : 1.5 m/s2
Work mode: drilling into metal
Vibration emission (ah,D) : 2.5 m/s2 or less
Uncertainty (K) : 1.5 m/s2

Model DHP456

Work mode: impact drilling into concrete
Vibration emission (ah,ID) : 8.0 m/s2
Uncertainty (K) : 1.5 m/s2
Work mode: drilling into metal
Vibration emission (ah,D) : 2.5 m/s or less
Uncertainty (K) : 1.5 m/s2

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.
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.
Be sure to identify safety measures to protect the operator that is 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). or
European countries only
EC Declaration of Conformity
Makita declares the following Machine(s):
Designation of Machine:
Cordless Hammer Driver-Drill
Model No./ Type: DHP446, DHP456
Conforms to the following European Directives:
2006/42/EC
They are manufactured in accordance with the following standard or standardized documents:
EN60745
The technical file in accordance with 2006/42/EC is available from:
Makita, Jan-Baptist Vinkstraat 2, 3070, Belgium

31.12.2013 Yasushi Fukaya
Director
Makita, Jan-Baptist Vinkstraat 2, 3070, Belgium

General Power Tool Safety Warnings

WARNING Read all safety warnings and all instructions. Failure to follow the warnings and instructions may 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.
Work area safety

Keep work area clean and well-lit. Cluttered or dark areas invite accidents.
Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust. Power tools create sparks that may ignite dust or fumes.
Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.
Electrical safety
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. Unmodified plugs and matching outlets will reduce the risk of electric shock.
Avoid body contact with earthed or grounded surfaces such as pipes, radiators, ranges, and refrigerators. There is an increased risk of electric shock if your body is earthed or grounded.
Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.
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.
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.
If operating a power tool in a damp location is unavoidable, use a ground fault circuit interrupter (GFCI) protected supply. Use of a GFCI reduces the risk of electric shock.
Personal safety
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 influence of drugs, alcohol, or medication. A moment of inattention while operating power tools may result in serious personal injury.
Use personal protective equipment. Always wear eye protection. Protective equipment such as dust masks, non-skid safety shoes, hard hats, or hearing protection used for appropriate conditions will reduce personal injuries.
Prevent unintentional starting. Ensure the switch is in the off-position before connecting to a power source and/or battery pack, picking up or carrying the tool. Carrying power tools with your finger on the switch or energizing power tools that have the switch on invites accidents.
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.
Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations.
Dress properly. Do not wear loose clothing or jewelry. Keep your hair, clothing, and gloves away from moving parts. Loose clothes, jewelry, or long hair can be caught in moving parts.
If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used. The use of dust collection can reduce dust-related hazards. ”
Power tool use and care
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 at which it was designed.
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.
Disconnect the plug from the power source and/or the battery pack from the power tool before making any adjustments, changing accessories, or storing power tools. Such preventive safety measures reduce the risk of starting the power tool accidentally.
Store idle power tools out of the reach of children 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.
Maintain power tools. Check for misalignment or binding of moving parts, breakage of parts, and any other condition that may affect the power tool’s operation. If damaged, have the power tool repaired before use. Many accidents are caused by poorly maintained power tools.
Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier to control.
Use the power tool, accessories and tool bits, etc. in accordance with these instructions, taking 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.
Battery tool use and care
Recharge only with the charger specified by the manufacturer. A charger that is suitable for one type of battery pack may create a risk of fire when used with another battery pack.
Use power tools only with specifically designated battery packs. Use of any other battery packs may create a risk of injury and fire.
When the 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 terminals together may cause burns or a fire.
Under abusive conditions, liquid may be ejected from the battery; avoid contact. If contact accidentally occurs, flush with water. If liquid contacts eyes, additionally seek medical help. Liquid ejected from the battery may cause irritation or burns.
Service
Have your power tool serviced by a qualified repair person using only identical replacement parts. This will ensure that the safety of the power tool is maintained.
Follow instruction for lubricating and changing accessories.
Keep handles dry, clean, and free from oil and grease.

CORDLESS HAMMER DRIVER DRILL SAFETY WARNINGS

Wear ear protectors when impact drilling. Exposure to noise can cause hearing loss.
Use auxiliary handle(s), if supplied with the tool. Loss of control can cause personal injury.
Hold power tool by insulated gripping surfaces, when performing an operation where the cutting accessory may contact hidden wiring. Cutting accessory contacting a “live” wire may make exposed metal parts of the power tool “live” and could give the operator an electric shock.
Hold 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.
Always be sure you have a firm footing. Be sure no one is below when using the tool in high locations.
Hold the tool firmly.
Keep hands away from rotating parts.
Do not leave the tool running. Operate the tool only when hand-held.
Do not touch the bit or the workpiece immediately after operation; they may be extremely hot and could burn your skin.
Some material contains chemicals that may be toxic. Take caution to prevent dust inhalation and skin contact. Follow material supplier safety data.

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

Before using the battery cartridge, read all instructions and cautionary markings on (1) battery charger, (2) battery, and (3) product using the battery.
Do not disassemble the battery cartridge.
If the operating time has become excessively shorter, stop operating immediately. It may result in a risk of overheating, possible burns, and even an explosion.
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.
Do not short the battery cartridge:
(1) Do not touch the terminals with any conductive material.
(2) Avoid storing battery cartridges in a container with other metal objects such as nails, coins, etc.
(3) Do not expose the battery cartridge to water or rain.
A battery short can cause a large current flow, overheating, possible burns, and even a breakdown.
Do not store the tool and battery cartridge in locations where the temperature may reach or exceed 50 ﾟ C (122 ﾟ F).
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.
Be careful not to drop or strike the battery.
Do not use a damaged battery.
Follow your local regulations relating to the disposal of batteries.

SAVE THESE INSTRUCTIONS.

Tips for maintaining maximum battery life

Charge the battery cartridge before completely discharging.
Always stop tool operation and charge the battery cartridge when you notice less tool power.
Never recharge a fully charged battery cartridge.
Overcharging shortens the battery service life.
Charge the battery cartridge with room temperature at 10 ﾟ C – 40 ﾟ C (50 ﾟ F – 104 ﾟ F).
Let a hot battery cartridge cool down before charging it.
Charge the battery cartridge once every six months if you do not use it for a long period of time.

FUNCTIONAL DESCRIPTION

CAUTION:

Always be sure that the tool is switched off and the battery cartridge is removed before adjusting or checking the function on the tool. Installing or removing battery cartridge

Red indicator
Button
Battery cartridge

CAUTION:

Always switch off the tool before installing or removing the battery cartridge.
Hold the tool and the battery cartridge firmly when installing or removing the 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.

To remove the battery cartridge, slide it from the tool while 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.
Do not install the battery cartridge forcibly. If the cartridge does not slide in easily, it is not being inserted correctly.

Battery protection system
(Lithium-ion battery with star marking)

Star marking

Lithium-ion batteries with a star marking are equipped with a protection system. This system automatically cuts off power to the tool to extend battery life.
The tool will automatically stop during operation if the tool and/or battery are placed under one of the following conditions:

Overloaded:
The tool is operated in a manner that causes it to draw an abnormally high current. In this situation, release the switch trigger on the tool and stop the application that caused the tool to become overloaded. Then pull the switch trigger again to restart.
If the tool does not start, the battery is overheated. In this situation, let the battery cool before pulling the switch trigger again.
Low battery voltage:
The remaining battery capacity is too low and the tool will not operate. In this situation, remove and recharge the battery.

Switch action

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.

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.

Lighting up the front lamp

Lamp

CAUTION:

Do not look in the light or see the source of light directly.
Pull the switch trigger to light up the lamp. The lamp keeps on lighting while the switch trigger is being pulled. The lamp goes out 10 -15 seconds after releasing the trigger. NOTE:
Use a dry cloth to wipe the dirt off the lens of the lamp. Be careful not to scratch the lens or lamp, or it may lower the illumination.

Reversing switch action

Reversing switch lever

CAUTION:
Always check the direction of rotation before operation.
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.
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, fthe switch trigger cannot be pulled.

Speed change 1. Speed change lever
CAUTION:

Always set the speed change lever fully to the correct position. If you operate the tool with the speed change lever positioned halfway between the “1” side and “2” side, the tool may be damaged.
Do not use the speed change lever while the tool is running. The tool may be damaged.

To change the speed, first, switch off the tool and then slide the speed change lever to the “2” side for high speed or “1” side for low speed. Be sure that the speed change lever is set to the correct position before operation. Use the right speed for your job.
Selecting the action mode

Action mode changing ring
Adjusting ring
Graduation
Arrow

This tool employs an action mode-changing ring. Select one of the three modes suitable for your work needs by using this ring.
For rotation only, turn the ring so that the arrow on the tool body points toward the mark on the ring.
For rotation with hammering, turn the ring so that the arrow points toward the mark on the ring.
For rotation with clutch, turn the ring so that the arrow points toward the mark on the ring.
CAUTION:

Always set the ring correctly to your desired mode mark. If you operate the tool with the ring positioned halfway between the mode marks, the tool may be damaged.

Adjusting the fastening torque

Action mode changing ring
Adjusting ring
Graduation
Arrow

The fastening torque can be adjusted in 16 steps by turning the adjusting ring so that the graduations are aligned with the arrow on the tool body. The fastening torque is minimum when the number 1 is aligned with the arrow, and maximum when the number 16 is aligned with the arrow.
Before the actual operation, drive a trial screw into your material or a piece of duplicate material to determine which torque level is required for a particular application.

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.
Installing or removing the driver bit or drill bit

Turn the sleeve counterclockwise to open the chuck jaws.
Place the bit in the chuck as far as it will go. Turn the sleeve clockwise to tighten the chuck.
To remove the bit, turn the sleeve counterclockwise.
Installing the hook

Groove
Hook
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.
Installing the bit holder (Optional accessory)

Bit holder
Bit

Fit the bit holder into the protrusion at the tool foot on either right or left side and secure it with a screw. When not using the driver bit, keep it in the bit holders. Bits 45 mm long can be kept there.

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 with one hand on the grip and the
another hand on the bottom of the battery cartridge to control the twisting action.
Hammer drilling operation
CAUTION:
There is a tremendous and sudden twisting force exerted on the tool/bit at the time of hole break-through, when the hole becomes clogged with chips and particles, or when striking reinforcing rods embedded in the concrete.
First, turn the action n mode changing ring so that the arrow on the tool body points to the marking. The adjusting ring can be aligned in any torque level for this operation.
Be sure to use a tungsten-carbide tipped bit. Position the bit at the desired location for the hole, then pull the switch trigger. Do not force the tool. Light pressure gives the best results. Keep the tool in position and prevent it from slipping away from the hole.
Do not apply more pressure when the hole becomes clogged with chips or particles. Instead, run the tool at an idle, then remove the bit partially from the hole. By repeating this several times, the hole will be cleaned out and normal drilling may be resumed.
Blow-out bulb (optional accessory)
1. Blow-out bulb
After drilling the hole, use the blow-out bulb to clean the dust out of the hole.
Screwdriving operation First, turn the action mode changing ring so that the arrow on the tool body points to the marking. Adjust the adjusting ring to the proper torque level for your work.
Then proceed as follows.
Place the point of the driver bit in the screw head and apply pressure to the tool. Start the tool slowly and then increase the speed gradually. Release the switch trigger
as soon as the clutch cuts in.
CAUTION:
Make sure that the driver bit is inserted straight in the screw head, or the screw and/or it may be damaged.
NOTE:
When driving wood screws, predrill pilot holes to make driving easier and to prevent splitting of the workpiece. See the chart.

Nominal diameter of wood screw (mm)| The recommended size of the pilot hole (mm)
---|---
3.1| 2.0 – 2.2
3.5| 2.2 – 2.5
3.8| 2.5 – 2.8
4.5| 2.9 – 3.2
4.8| 3.1 – 3.4
5.1| 3.3 – 3.6
5.5| 3.7 – 3.9
5.8| 4.0 – 4.2
6.1| 4.2 – 4.4

Drilling operation
First, turn the adjusting ring so that the pointer points to the marking. Then proceed as follows.
CAUTION:

Pressing excessively on the tool will not speed up the drilling. In fact, this excessive pressure will only serve to damage the tip of your bit, decrease the tool performance and shorten the service life of the tool.
There is a tremendous force exerted on the tool/bit at the time of hole breakthrough. Hold the tool firmly and exert care when the bit begins to break through the workpiece.
A stuck bit can be removed simply by setting the reversing switch to reverse rotation in order to back out. However, the tool may back out abruptly if you do not hold it firmly.
Always secure small workpieces in a vise or with a similar hold-down device.
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.

Drilling in wood
When drilling in wood, the best results are obtained with wood drills equipped with a guide screw. The guide screw makes drilling easier by pulling the bit into the workpiece.
Drilling in metal To prevent the bit from slipping when starting to make a hole, make an indentation with a center punch and hammer at the point to be drilled. Place the point of the bit in the indentation and start drilling. Use a cutting lubricant when drilling metals. The exceptions are iron and brass which should be drilled dry.

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, benzene, thinner, alcohol, or the like. Discoloration, deformation or cracks may result.

Replacing the carbon brushes
1. Limit mark

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 two screws then remove the rear cover.

Rear cover
Screw

Raise the arm part of the spring and then place it in the recessed part of the housing with a slotted bit screwdriver with a slender shaft or the like.

Recessed part
Spring
Arm

Use pliers to remove the carbon brush caps of the carbon brushes. Take out the worn carbon brushes, insert the new ones and replace the carbon brush caps in reverse.
Carbon brush cap

Make sure that the carbon brush caps have fit into the holes in the brush holders securely.

Reinstall the rear cover and tighten two screws securely. 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 the accessories or attachments for their stated purposes. If you need any assistance for more details regarding these accessories, ask your local Makita Service Center.