Makita 8406 User manual

INSTRUCTION MANUAL
Diamond Core Hammer Drill
8406
ENGLISH: Original instructions
DOUBLE INSULATION
Read before use.

2ENGLISH
SPECIFICATIONS
Model 8406
Capacities Concrete Diamond core bit 152 mm
Tungsten-carbide tipped bit 20 mm
Steel 13 mm
Wood 30 mm
No load speed (min-1)0 - 1,500
Blows per minute 0 - 22,500
Overall length 400 mm
Net weight 3.7 kg
Safety class /II
• Due to our continuing program of research and development, the specications herein are subject to change without notice.
• Specications may di󰀨er from country to country.
• Weight according to EPTA-Procedure 01/2014
Symbols
The followings show the symbols which may be used
for the equipment. Be sure that you understand their
meaning before use.
Read instruction manual.
DOUBLE INSULATION
Only for EU countries
Do not dispose of electric equipment
together with household waste material!
In observance of the European Directive,
on Waste Electric and Electronic Equipment
and its implementation in accordance with
national law, electric equipment 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 drilling in brick and concrete
with diamond core bit. It is also suitable for impact
drilling in brick, concrete and stone as well as for drilling
without impact in wood, metal, ceramic and plastic.
Power supply
The tool should be connected only to a power supply of
the same voltage as indicated on the nameplate, and
can only be operated on single-phase AC supply. They
are double-insulated and can, therefore, also be used
from sockets without earth wire.
Noise
The typical A-weighted noise level determined accord-
ing to EN62841-2-1:
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 di󰀨er 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 measures
to protect the operator that are based on an estima-
tion of exposure in the actual conditions of use (tak-
ing account of all parts of the operating cycle such
as the times when the tool is switched o󰀨 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 EN62841-2-1:
Work mode : drilling into concrete
Vibration emission (ah,DD) : 9.8 m/s2
Uncertainty (K) : 1.5 m/s2
Work mode: impact drilling into concrete
Vibration emission (ah,ID) : 9.5 m/s2
Uncertainty (K) : 1.5 m/s2
Work mode: drilling into metal
Vibration emission (ah,D) : 2.5 m/s2or less
Uncertainty (K) : 1.5 m/s2
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 di󰀨er 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
o󰀨 and when it is running idle in addition to the
trigger time).

3ENGLISH
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 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-oper-
ated (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 unavoid-
able, use a residual current device (RCD) protected
supply. Use of an RCD reduces the risk of electric shock.
7. Use of power supply via an RCD with a rated residual
current of 30 mA or less is always recommended.
8. 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.
9. Do not touch the power plug with wet hands.
10.
If the cord is damaged, have it replaced by the manu-
facturer or his agent in order to avoid a safety hazard.
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 o󰀨-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.
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.

4ENGLISH
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 o󰀨. 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 a󰀨ect 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 di󰀨erent 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.
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. Follow instruction for lubricating and chang-
ing accessories.
Hammer drill safety warnings
Safety instructions for all operations
1. Wear ear protectors when impact drilling.
Exposure to noise can cause hearing loss.
2. Use the auxiliary handle(s). Loss of control can
cause personal injury.
3. Hold the power tool by insulated gripping
surfaces, when performing an operation where
the cutting accessory may contact hidden wir-
ing or its own cord. Cutting accessory contacting
a "live" wire may make exposed metal parts of the
power tool "live" and could give the operator an
electric shock.
4. Always be sure you have a rm footing. Be
sure no one is below when using the tool in
high locations.
5. Hold the tool rmly with both hands.
6. Keep hands away from rotating parts.
7. Do not leave the tool running. Operate the tool
only when hand-held.
8. Do not touch the drill bit or the workpiece
immediately after operation; they may be
extremely hot and could burn your skin.
9. Some material contains chemicals which may
be toxic. Take caution to prevent dust inhala-
tion and skin contact. Follow material supplier
safety data.
10. If the drill bit cannot be loosened even you
open the jaws, use pliers to pull it out. In such a
case, pulling out the drill bit by hand may result in
injury by its sharp edge.
Safety instructions when using long drill bits
1. Never operate at higher speed than the max-
imum speed rating of the drill bit. At higher
speeds, the bit is likely to bend if allowed to rotate
freely without contacting the workpiece, resulting
in personal injury.
2. Always start drilling at low speed and with the
bit tip in contact with the workpiece. At higher
speeds, the bit is likely to bend if allowed to rotate
freely without contacting the workpiece, resulting
in personal injury.
3. Apply pressure only in direct line with the bit
and do not apply excessive pressure. Bits can
bend causing breakage or loss of control, resulting
in personal injury.
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.

5ENGLISH
FUNCTIONAL
DESCRIPTION
CAUTION:
• Always be sure that the tool is switched o󰀨 and
unplugged before adjusting or checking function
on the tool.
Switch action
1
► 1. Switch trigger
CAUTION:
• Before plugging in 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.
Selecting the action mode
1
► 1. Change lever
This tool has an action mode changing lever.
For rotation with hammering, turn the lever to the posi-
tion of symbol.
For rotation only, turn the lever to the position
of symbol.
Torque limiter
CAUTION:
• Do not continue to operate the tool for more
than two seconds while the clutch is slipping.
• Do not let the torque limiter actuate too
frequently.
This tool is equipped with a clutch-type torque lim-
iter. The clutch will slip when a certain torque level
is reached, causing the motor to disengage from the
output shaft. When this happens, the chuck will stop
turning.
ASSEMBLY
CAUTION:
• Always be sure that the tool is switched o󰀨 and
unplugged before carrying out any work on the
tool.
Installing side grip (auxiliary handle)
Always use the side grip to ensure operating safety.
Screw the side grip on the tool securely. The side grip
can be installed on either side of the tool, whichever is
convenient.
Installing or removing diamond core
bit or drill bit
1
► 1. Chuck key

6ENGLISH
To install the bit, place it in the chuck as far as it will go. Tighten the
chuck by hand. Place the chuck key in each of the three holes and
tighten clockwise. Be sure to tighten all three chuck holes evenly.
To remove the bit, turn the chuck key counterclockwise
in just one hole, then loosen the chuck by hand.
After using the chuck key, be sure to return to the orig-
inal position.
OPERATION
CAUTION: Always use the side grip (auxiliary
handle) and rmly hold the tool by both side grip
and switch handle during operations.
Diamond core drilling operation
CAUTION:
• Never use "rotation with hammering" action
when drilling with a diamond core drill. The core
bit may be damaged.
When diamond core drilling, adopt the following procedure:
1. Prior to using a diamond core bit, drill a 13 mm
pilot hole using a masonry drill bit (tungsten-car-
bide tipped hammer bit).
2. Remove the masonry drill bit from the drill chuck.
3. Set the change lever from "rotation with hammer-
ing" position to "rotation only" position.
4. Install a diamond core bit into the chuck.
5. Place the diamond core bit on drilling location so
that the center bit is inserted into the pilot hole.
6.
When drilling, always hold the tool squarely against material.
7. Do not force the core bit, allow the core bit to do
the work. This will prolong the life of the core bit
and reduce breakage.
8. Ensure that the masonry dust/swarf produced
during drilling is regularly removed.
Allowing the dust/swarf to accumulate will result
it overheating and excessive clutch/torque limiter
wear and the loss of segments from the core bit.
9. When entering or leaving a hole, ensure that the
core bit is rotating.
10. If the core bit starts to vibrate and when the core
bit begins to break through material, reduce pres-
sure immediately.
11. After use, store the core bit carefully in its box and
remember that it is a diamond core bit.
NOTE:
• A pilot hole is not required for 22 mm and 28 mm
diameter core bits.
Hammer drilling operation
(with a tungsten-carbide tipped bit)
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 rein-
forcing rods embedded in the concrete. Always
use the side grip (auxiliary handle) and rmly
hold the tool by both side grip and switch handle
during operations. Failure to do so may result
in the loss of control of the tool and potentially
severe injury.
When drilling in concrete, granite, tile, etc., move the
action mode changing lever to the position of sym-
bol to use "rotation with hammering" action.
Blow-out bulb (optional accessory)
1
► 1. Blow-out bulb
After drilling the hole, use the blow-out bulb to clean the
dust out of the hole.
Drilling operation
(with a conventional drill bit)
When drilling in wood, metal or plastic materials, move
the action mode changing lever to the position of sym-
bol to use "rotation only" action.
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 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 excep-
tions are iron and brass which should be drilled dry.

7ENGLISH
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 break through. Hold the tool rmly and exert
care when the bit begins to break through the workpiece.
• Always secure small workpieces in a vise or
similar hold-down device.
MAINTENANCE
CAUTION:
• Always be sure that the tool is switched o󰀨 and
unplugged before attempting to perform inspec-
tion or maintenance.
• Never use gasoline, benzine, thinner, alcohol
or the like. Discoloration, deformation or cracks
may result.
To maintain product SAFETY and RELIABILITY, repairs, carbon
brush inspection and replacement, 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 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.
• Tungsten-carbide tipped drill bit
• Hole saw
• Diamond core bit (Dry type)
• Center bit
• Center bit shank
• Diamond core bit (wet type)
• Guide ring
• Sheet
• Sponge
• Water protection collar
• Blow-out bulb
• Chuck key
• Side grip
• Plastic carrying case
NOTE: Some items in the list may be included in the
tool package as standard accessories. They may
di󰀨er from country to country.

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
883731H991
EN
20201218