Makita GEC01 User manual

INSTRUCTION MANUAL
MANUAL DE INSTRUCCIONES
Cordless Power Cutter
Cortadora de Concreto
Inalámbrica
GEC01
IMPORTANT: Read Before Using.
IMPORTANTE: Lea antes de usar.

2ENGLISH
ENGLISH (Original instructions)
SPECIFICATIONS
Model: GEC01
Wheel diameter 355 mm (14″)
Max. wheel thickness 5.0 mm (3/16″)
Max. cutting depth 127 mm (5″)
Rated speed 5,300 /min
Rated voltage D.C. 72 V - 80 V max
Max. permitted pressure of feed-water 5.0 bars
Overall length 786 mm (31″)
Net weight 12.3 - 14.1 kg (27.1 - 31.1 lbs)
• 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.
• The weight may di󰀨er 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 BL4040 / BL4050F* / BL4080F*
* : Recommended battery
Charger DC40RA / DC40RB / DC40RC
• 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 re.
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-operated (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
unavoidable, use a ground fault circuit inter-
rupter (GFCI) protected supply. Use of a GFCI
reduces the risk of electric shock.

3ENGLISH
7.
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.
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 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, clothing and gloves
away from moving parts. Loose clothes, jewel-
lery 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.
It is an employer's responsibility to enforce the
use of appropriate safety protective equipment
by the tool operators and by other persons in
the immediate working area.
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.
Battery tool use and care
1. Recharge only with the charger specied by
the manufacturer. A charger that is suitable for
one type of battery pack may create a risk of re
when used with another battery pack.
2. Use power tools only with specically desig-
nated battery packs. Use of any other battery
packs may create a risk of injury and re.
3. When 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 termi-
nals together may cause burns or a re.
4. Under abusive conditions, liquid may be
ejected from the battery; avoid contact. If con-
tact accidentally occurs, ush with water. If
liquid contacts eyes, additionally seek medical
help. Liquid ejected from the battery may cause
irritation or burns.
5. Do not use a battery pack or tool that is dam-
aged or modied. Damaged or modied batteries
may exhibit unpredictable behaviour resulting in
re, explosion or risk of injury.
6. Do not expose a battery pack or tool to re or
excessive temperature. Exposure to re or tem-
perature above 130 °C may cause explosion.
7. Follow all charging instructions and do not
charge the battery pack or tool outside the
temperature range specied in the instruc-
tions. Charging improperly or at temperatures
outside the specied range may damage the
battery and increase the risk of re.

4ENGLISH
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. Never service damaged battery packs. Service
of battery packs should only be performed by the
manufacturer or authorized service providers.
3. Follow instruction for lubricating and chang-
ing accessories.
4. Do not modify or attempt to repair the appli-
ance or the battery pack except as indicated in
the instructions for use and care.
Cordless cutter safety warnings
1. The guard provided with the tool must be
securely attached to the power tool and
positioned for maximum safety, so the least
amount of wheel is exposed towards the oper-
ator. Position yourself and bystanders away
from the plane of the rotating wheel. The guard
helps to protect operator from broken wheel frag-
ments and accidental contact with wheel.
2. Use only bonded reinforced or diamond cut-o󰀨
wheels for your power tool. Just because an
accessory can be attached to your power tool, it
does not assure safe operation.
3. The rated speed of the accessory must be at
least equal to the maximum speed marked on
the power tool. Accessories running faster than
their rated speed can break and y apart.
4.
Wheels must be used only for recommended
applications. For example: do not grind with the
side of cut-o󰀨 wheel. Abrasive cut-o󰀨 wheels are
intended for peripheral grinding, side forces applied
to these wheels may cause them to shatter.
5. Always use undamaged wheel anges that are
of correct diameter for your selected wheel.
Proper wheel anges support the wheel thus
reducing the possibility of wheel breakage.
6. Do not use worn down reinforced wheels from
larger power tools. Wheels intended for a larger
power tool are not suitable for the higher speed of
a smaller tool and may burst.
7. The outside diameter and the thickness of your
accessory must be within the capacity rating
of your power tool. Incorrectly sized accessories
cannot be adequately guarded or controlled.
8. The arbour size of wheels and anges must
properly t the spindle of the power tool.
Wheels and anges with arbour holes that do not
match the mounting hardware of the power tool
will run out of balance, vibrate excessively and
may cause loss of control.
9. Do not use damaged wheels. Before each
use, inspect the wheels for chips and cracks.
If power tool or wheel is dropped, inspect for
damage or install an undamaged wheel. After
inspecting and installing the wheel, position
yourself and bystanders away from the plane
of the rotating wheel and run the power tool
at maximum no load speed for one minute.
Damaged wheels will normally break apart during
this test time.
10. Wear personal protective equipment.
Depending on application, use face shield,
safety goggles or safety glasses. As appro-
priate, wear dust mask, hearing protectors,
gloves and shop apron capable of stopping
small abrasive or workpiece fragments. The
eye protection must be capable of stopping ying
debris generated by various operations. The dust
mask or respirator must be capable of ltrating
particles generated by your operation. Prolonged
exposure to high intensity noise may cause hear-
ing loss.
11. Keep bystanders a safe distance away from
work area. Anyone entering the work area
must wear personal protective equipment.
Fragments of workpiece or of a broken wheel may
y away and cause injury beyond immediate area
of operation.
12. Hold the power tool by insulated gripping
surfaces only, when performing an operation
where the cutting accessory may contact hid-
den 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.
13. Never lay the power tool down until the acces-
sory has come to a complete stop. The spinning
wheel may grab the surface and pull the power
tool out of your control.
14. Do not run the power tool while carrying it at
your side. Accidental contact with the spinning
accessory could snag your clothing, pulling the
accessory into your body.
15. Regularly clean the power tool’s air vents. The
motor’s fan will draw the dust inside the housing
and excessive accumulation of powdered metal
may cause electrical hazards.
16. Do not operate the power tool near ammable
materials. Sparks could ignite these materials.
Kickback and related warnings
Kickback is a sudden reaction to a pinched or snagged
rotating wheel. Pinching or snagging causes rapid
stalling of the rotating wheel which in turn causes the
uncontrolled power tool to be forced in the direction
opposite of the wheel’s rotation at the point of the
binding.
For example, if an abrasive wheel is snagged or
pinched by the workpiece, the edge of the wheel that is
entering into the pinch point can dig into the surface of
the material causing the wheel to climb out or kick out.
The wheel may either jump toward or away from the
operator, depending on direction of the wheel’s move-
ment at the point of pinching. Abrasive wheels may also
break under these conditions.
Kickback is the result of power tool misuse and/or
incorrect operating procedures or conditions and can be
avoided by taking proper precautions as given below.
1. Maintain a rm grip on the power tool and
position your body and arm to allow you to
resist kickback forces. Always use auxiliary
handle, if provided, for maximum control over
kickback or torque reaction during start-up.
The operator can control torque reactions or kick-
back forces, if proper precautions are taken.
2. Never place your hand near the rotating acces-
sory. Accessory may kickback over your hand.

5ENGLISH
3. Do not position your body in line with the
rotating wheel. Kickback will propel the tool in
direction opposite to the wheel’s movement at the
point of snagging.
4. Use special care when working corners, sharp
edges etc. Avoid bouncing and snagging the
accessory. Corners, sharp edges or bouncing
have a tendency to snag the rotating accessory
and cause loss of control or kickback.
5. Do not attach a saw chain, woodcarving blade,
segmented diamond wheel with a peripheral
gap greater than 10 mm or toothed saw blade.
Such blades create frequent kickback and loss of
control.
6. Do not “jam” the wheel or apply excessive
pressure. Do not attempt to make an excessive
depth of cut. Overstressing the wheel increases
the loading and susceptibility to twisting or binding
of the wheel in the cut and the possibility of kick-
back or wheel breakage.
7. When wheel is binding or when interrupting
a cut for any reason, switch o󰀨 the power
tool and hold the power tool motionless until
the wheel comes to a complete stop. Never
attempt to remove the wheel from the cut while
the wheel is in motion otherwise kickback may
occur. Investigate and take corrective action to
eliminate the cause of wheel binding.
8. Do not restart the cutting operation in the
workpiece. Let the wheel reach full speed and
carefully re-enter the cut. The wheel may bind,
walk up or kickback if the power tool is restarted in
the workpiece.
9. Support panels or any oversized workpiece to
minimize the risk of wheel pinching and kick-
back. Large workpieces tend to sag under their
own weight. Supports must be placed under the
workpiece near the line of cut and near the edge
of the workpiece on both sides of the wheel.
10. Use extra caution when making a “pocket cut”
into existing walls or other blind areas. The
protruding wheel may cut gas or water pipes, elec-
trical wiring or objects that can cause kickback.
Additional Safety Warnings:
1. Before using a segmented diamond wheel,
make sure that the diamond wheel has the
peripheral gap between segments of 10 mm or
less, only with a negative rake angle.
2. Never attempt to cut with the tool held upside
down in a vise. This can lead to serious acci-
dents, because it is extremely dangerous.
3. Some material contains chemicals which may
be toxic. Take caution to prevent dust inhala-
tion and skin contact. Follow material supplier
safety data.
4. Store wheels as per manufacturer recommen-
dations. Improper storage may damage the
wheels.
5. Always use the wheel suitable for your work
and the material to be cut.
6. Examine the material to be cut before cutting.
If the material contains explosive or ammable
substances, it may cause an explosion or re.
7. Do not switch on the tool if a foreign object
is jammed between the guard and the wheel.
In this case, uninstall the battery cartridge and
remove the foreign object.
8. Use clamps or similar to support the work-
piece whenever possible.
9. Always wear hearing protection during
operation.
10. Do not cut wood materials with this tool.
11. The outside diameter and the thickness of the
wheel must be within the capacity rating of
your power tool. Incorrectly sized wheels cannot
be adequately guarded or controlled.
12. When operating the power tool, maintain a rm
grip with both hands on the power tool and
position your body and arm to allow you to
resist kickback forces.
13. Keep your hands or face away from the rotat-
ing wheel.
14. Adjust the wheel cover to a position suitable
for your work.
15. When you use the tool on muddy ground, wet
slope, or slippery place, pay attention to your
footing.
16. Do not submerge the tool into a puddle.
17. Do not leave the tool unattended outdoors in
the rain.
18. Do not replace the battery in the rain.
19. When storing the tool, avoid direct sunlight
and rain, and store it in a place where it does
not get hot or humid.
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.
Symbols
The followings show the symbols used for tool.
diameter
volts
direct current
rated speed
revolutions or reciprocation per minute

6ENGLISH
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 or tamper with the battery
cartridge. It may result in a re, 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 atten-
tion 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 con-
ductive material.
(2) Avoid storing battery cartridge in a con-
tainer 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
ow, overheating, possible burns and even a
breakdown.
6. Do not store and use the tool and battery car-
tridge in locations where the temperature may
reach or exceed 50 °C (122 °F).
7. Do not incinerate the battery cartridge even if
it is severely damaged or is completely worn
out. The battery cartridge can explode in a re.
8. 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
re, excessive heat, or explosion.
9. Do not use a damaged battery.
10. The contained lithium-ion batteries are subject
to the Dangerous Goods Legislation require-
ments.
For commercial transports e.g. by third parties,
forwarding agents, special requirement 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 o󰀨 open contacts and pack up the
battery in such a manner that it cannot move
around in the packaging.
11. 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.
12. Use the batteries only with the products
specied by Makita. Installing the batteries to
non-compliant products may result in a re, exces-
sive heat, explosion, or leak of electrolyte.
13. If the tool is not used for a long period of time,
the battery must be removed from the tool.
14. During and after use, the battery cartridge may
take on heat which can cause burns or low
temperature burns. Pay attention to the han-
dling of hot battery cartridges.
15. Do not touch the terminal of the tool imme-
diately after use as it may get hot enough to
cause burns.
16. Do not allow chips, dust, or soil stuck into the
terminals, holes, and grooves of the battery
cartridge. It may cause heating, catching re,
burst and malfunction of the tool or battery car-
tridge, resulting in burns or personal injury.
17. Unless the tool supports the use near
high-voltage electrical power lines, do not use
the battery cartridge near a high-voltage elec-
trical power lines. It may result in a malfunction
or breakdown of the tool or battery cartridge.
18. 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 res, personal injury and damage. It will
also void the Makita warranty for the Makita tool and
charger.
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
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).

7ENGLISH
PARTS DESCRIPTION
17
1
2
43
6
5
16
15
14
12 11
9
13
10
18
7
8
Fig.1
1Abrasive cut-o󰀨 wheel /
diamond wheel
2Wheel guard 3Wheel cover grip 4Front grip
5Lamp 6Battery cartridge 7Lock-o󰀨 button 8Caster
9Shaft lock button 10 Cover 11 Cock 12 Water inlet
13 Handle 14 Switch trigger 15 Lamp button 16 Overload indicator
17 Coupling sleeve 18 Box wrench ----

8ENGLISH
FUNCTIONAL DESCRIPTION
CAUTION: Always be sure that the tool is
switched o󰀨 and the battery cartridge is removed
before adjusting or checking function on the tool.
Installing or removing battery cartridge
CAUTION: Always switch o󰀨 the tool before
installing or removing of the battery cartridge.
CAUTION: Hold the tool and the battery car-
tridge rmly when installing or removing battery
cartridge. Failure to hold the tool and the battery
cartridge rmly may cause them to slip o󰀨 your hands
and result in damage to the tool and battery cartridge
and a personal injury.
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.
3
1
1
2
Fig.2
► 1. Red indicator 2. Button 3. Battery cartridge
To remove the battery cartridges, lift the battery car-
tridge while pushing the button on the front of the
cartridge.
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.
NOTE: The tool does not work with only one battery
cartridge.
Indicating the remaining battery
capacity
Press the check button on the battery cartridge to indi-
cate the remaining battery capacity. The indicator lamps
light up for a few seconds.
1
2
Fig.3
► 1. Indicator lamps 2. Check button
Indicator lamps Remaining
capacity
Lighted O󰀨 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 di󰀨er slightly
from the actual capacity.
NOTE: The rst (far left) indicator lamp will blink when
the battery protection system works.

9ENGLISH
Tool / battery protection system
The tool is equipped with a tool/battery protection sys-
tem. This system automatically cuts o󰀨 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 tool/battery is operated in a manner that
causes it to draw an abnormally high current, the tool
automatically stops. In this situation, turn the tool o󰀨
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, and the lamp blinks. In this situation, let
the tool cool down before turning the tool on again.
Overdischarge protection
When the battery capacity becomes low, the tool stops automati-
cally, and the indicator lamp of battery cartridge blinks. If the tool
does not operate even when the switches are operated, remove
the batteries from the tool and charge the batteries.
Protections against other causes
Protection system is also designed for other causes that could
damage the tool and allows the tool to stop automatically.
Take all the following steps to clear the causes, when the tool
has been brought to a temporary halt or stop in operation.
1. Turn the tool o󰀨, and then turn it on again to restart.
2. Charge the battery(ies) or replace it/them with
recharged battery(ies).
3. Let the tool and battery(ies) cool down.
If no improvement can be found by restoring protection
system, then contact your local Makita Service Center.
NOTICE: If the tool stops due to a cause
not described above, refer to the section for
troubleshooting.
Overload alert
If the tool is operated with excessive load, the overload
indicator will blink in red. In this situation, reduce the
load on the tool. Then, the indicator stops blinking.
1
Fig.4
► 1. Overload indicator
Switch action
WARNING: Before installing the battery cartridge into
the tool, always check to see that the switch trigger actuates
properly and returns to the "OFF" position when released.
WARNING: NEVER defeat the lock-o󰀨 button
by taping down or some other means. A switch with
a negated lock-o󰀨 button may result in unintentional
operation and serious personal injury.
WARNING: NEVER use the tool if it runs when you
simply pull the switch trigger without pressing the lock-o󰀨
button. A switch in need of repair may result in unintentional
operation and serious personal injury. Return tool to a Makita
service center for proper repairs BEFORE further usage.
To prevent the switch trigger from being accidentally pulled, a lock-
o󰀨 button is provided. To start the tool, depress the lock-o󰀨 button
and pull the switch trigger. Release the switch trigger to stop.
1
2
Fig.5
► 1. Switch trigger 2. Lock-o󰀨 button
NOTICE: Do not pull the switch trigger hard without press-
ing in the lock-o󰀨 button. This can cause switch breakage.
Lighting the lamp
CAUTION: Do not look in the light or see the
source of light directly.
To turn on the lamp, press the lamp button. To turn o󰀨,
press the lamp button again.
2
1
Fig.6
► 1. Lamp button 2. Lamp
NOTE: The lamp will automatically be turned o󰀨 if
there is no operation with the tool for one minute.

10 ENGLISH
Adjusting the wheel cover
Hold the wheel cover grip and adjust the position of the
wheel cover suitable for your work.
1
Fig.7
► 1. Wheel cover grip
Active feedback sensing technology
The tool electronically detects situations where the
wheel may be at risk to be bound. In the situation, the
tool is automatically shut o󰀨 to prevent further rotation
of the spindle (it does not prevent kickback).
To restart the tool, switch o󰀨 the tool rst, remove the
cause of sudden drop in the rotation speed, and then
turn the tool on.
Electric brake
Electric brake is activated after the tool is switched o󰀨.
The brake does not work when the power supply is shut
down, such as the battery is removed accidentally, with
the switch still on.
ASSEMBLY
CAUTION: Always be sure that the tool is
switched o󰀨 and the battery cartridge is removed
before carrying out any work on the tool.
Installing or removing abrasive cut-
o󰀨 wheel / diamond wheel
CAUTION: Use only the Makita wrench to
install or remove the wheel.
CAUTION: When installing the wheel, be sure
to tighten the bolt securely.
CAUTION: Do not press the shaft lock button
when the wheel is rotating.
To remove the wheel, press the shaft lock button and
rotate the wheel until the wheel cannot revolve. While
the shaft lock is fully locked, turn the hex bolt counter-
clockwise using the box wrench. Then remove the hex
bolt, ange, wheel, ring, and ange in order.
1
2
3
4
Fig.8
► 1. Shaft lock button 2. Box wrench 3. Tighten
4. Loosen
3
4
2
5
2
5
1
Fig.9
► 1. Hex bolt 2. Flange 3. Ring 4. Abrasive cut-o󰀨
wheel / diamond wheel 5. Arrow (rotation direction
of the wheel)
To install the wheel, follow the removal procedure in
reverse.
BE SURE TO TIGHTEN THE HEX BOLT SECURELY.
CAUTION: Always install the wheel so that
the arrow on it points in the same direction as
the arrow on the wheel guard. Otherwise the wheel
rotates in reverse, it may cause personal injury.
CAUTION: Only use the wheel that are
marked with a speed equal or higher than the
speed marked on the tool.

11 ENGLISH
NOTE: When installing the wheel, be sure to attach
the anges so that the at side of ange faces the
wheel, and attach the ring that matches the inner
diameter of the wheel.
2 3
4
1
2
Fig.10
► 1. Hex bolt 2. Flange 3. Ring 4. Abrasive cut-o󰀨
wheel / diamond wheel
Connecting to water supply
1. Prepare a water hose.
2. Connect the coupling sleeve to the water hose by
turning the coupling sleeve.
1
2
Fig.11
► 1. Water hose 2. Coupling sleeve
3. Connect the water hose to the water supply.
When connecting to a water faucet, use a suitable tting
such as hose band or water tap joint.
12
3
Fig.12
► 1. Hose band 2. Water tap joint 3. Water hose
NOTE: The tting depends on the shape of the faucet
to which you connect. Prepare a suitable commercial-
ly-bought tting.
NOTE: If you use a water tap joint, prepare another
coupling sleeve and attach it to the other end of the
hose.
NOTE: When using a water pump, follow the instruc-
tions of your water pump to connect the water hose.
4. Push the coupling sleeve into the water inlet until it
locks with a click.
1
2
3
Fig.13
► 1. Coupling sleeve 2. Water inlet 3. Cock
NOTICE: Keep the cock closed until you start the
cutting operation with water feeding. For how to
feed water, refer to the section for the operation.
OPERATION
CAUTION: Be sure to hold the workpiece
rmly down on a stable bench or table during
operation.
CAUTION: Do not twist or force the tool in the
cut, or the motor may be overloaded or the work-
piece may break.

12 ENGLISH
Cutting
CAUTION: During operation, do not bring the
tool higher than your shoulder height.
Fig.14
Hold the tool rmly. Grasp the handle with your right
hand and the front grip with your left hand. To prevent
electric shock by accidental cutting of an electric cable,
always hold the front grip by the designated portion as
shown in the gure.
1
Fig.15
► 1. Part to hold
Move the tool over the workpiece surface, keeping it at and
advancing smoothly until the cutting is completed. Keep your
cutting line straight and your speed of advance uniform.
Fig.16
NOTE: When the battery cartridge temperature is
low, the tool may not work to its full capacity. At this
time, for example, use the tool for a light-duty cut for
a while until the battery cartridge warms up as high
as room temperature. Then, the tool can work to its
full capacity.
NOTE: If the cutting action of the diamond wheel
begins to diminish, dress the cutting edge of the
wheel using an old discarded coarse grit bench
grinder wheel or concrete block. Dress by pressing
lightly on the outer edge of the diamond wheel.
When feeding water during cutting
CAUTION: When using a wet-type diamond
wheel, always feed water during cutting.
Connect the tool to the water supply and turn the cock
in the direction of the arrow as illustrated. Adjust the
position of the cock to obtain a gentle ow of water.
1
Fig.17
► 1. Cock

13 ENGLISH
CAUTION: When feeding water, always keep
the tool head lower than the tool body to prevent
water entering into the tool mechanism. Failure to
do so may cause electric shock.
Fig.18
MAINTENANCE
CAUTION: Always be sure that the tool is
switched o󰀨 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.
Cleaning the tool
After each use, remove the battery cartridges and the
wheel, and then clean dust, dirt or metal chips accu-
mulated inside the wheel guard. Clean the tool body
by wiping o󰀨 dust, dirt with a dry cloth or one dipped in
soapy water and wrung out. Use a dry cloth to wipe the
dirt o󰀨 the lens of the lamp. Be careful not to scratch the
lens of lamp, or it may lower the illumination.
1
2
Fig.19
► 1. Wheel guard 2. Lens of the lamp
Cleaning the air vent
Regularly clean the tool's air vents or whenever the
vents start to become obstructed.
1
1
Fig.20
► 1. Air vent

14 ENGLISH
Replacing the synchro-belt
1. Remove the battery cartridges and the wheel.
2. Loosen the hex socket bolts using the tip of the
box wrench, and then remove the cover.
1
2
3
Fig.21
► 1. Box wrench 2. Hex socket bolt 3. Cover
3. Push in the shaft lock button and hold it to lock
the large pulley, and then turn the nut counterclockwise
using the thin end of the box wrench.
1
2
Fig.22
► 1. Large pulley 2. Shaft lock button
4. Push in the shaft lock button and hold it to lock the
large pulley, and then turn the small disc counterclock-
wise using the thick end of the box wrench to loosen the
synchro-belt.
1
2
3
Fig.23
► 1. Shaft lock button 2. Large pulley 3. Small disc
5. Remove the belt.
6. With the grooves on the belt inside, attach one
end of the belt to the small pulley, and then attach the
other end of the belt to the large pulley.
1
2
3
Fig.24
► 1. Belt 2. Large pulley 3. Small pulley

15 ENGLISH
7. Push in the shaft lock button and hold it to lock
the large pulley, and then turn the small disc clockwise
using the thick end of the box wrench to tighten the belt.
1
2
Fig.25
► 1. Shaft lock button 2. Large pulley
NOTE: Make sure that the small disc is in the position
shown in the gure.
1
Fig.26
► 1. Small disc
8. Push in the shaft lock button and hold it to lock the
large pulley, and then turn the nut clockwise using the
thin end of the box wrench.
1
Fig.27
► 1. Shaft lock button
NOTE: When tightening the nut, apply 19 - 21 N•m as
tightening torque.
9. Attach the cover, and then tighten the hex socket
bolts using the tip of the box wrench.
1
2
3
Fig.28
► 1. Box wrench 2. Hex socket bolt 3. Cover

16 ENGLISH
TROUBLESHOOTING
Before asking for repairs, conduct your own inspection rst. If you nd a problem that is not explained in the manual,
do not attempt to dismantle the tool. Instead, ask Makita Authorized Service Centers, always using Makita replace-
ment parts for repairs.
State of abnormality Probable cause (malfunction) Remedy
Motor does not run. Battery cartridges are not installed. Install two battery cartridges. This tool does not
work with one battery cartridge.
Battery problem (under voltage) Recharge the battery. If recharging is not e󰀨ective,
replace the battery cartridge.
The drive system does not work
correctly.
Ask your local authorized service center for repair.
Motor stops running after a little use. Battery's charge level is low. Recharge the battery. If recharging is not e󰀨ective,
replace the battery cartridge.
Overheating. Stop using of tool to allow it to cool down.
The wheel rotation does not acceler-
ate properly even after running the
tool without load for 20 seconds.
Battery is installed improperly. Install the battery cartridges as described in this
manual.
Battery power is dropping. Recharge the battery cartridges. If recharging is not
e󰀨ective, replace the battery cartridge.
The synchro-belt is slipping. Replace the synchro-belt with new one.
The drive system does not work
correctly.
Ask your local authorized service center for repair.
Wheel does not rotate:
stop the machine immediately!
The synchro-belt is slipping. Replace the synchro-belt with new one.
Foreign object is jammed between the
guard and the wheel.
Uninstall the battery cartridges and then remove the
foreign object.
The drive system does not work
correctly.
Ask your local authorized service center for repair.
Abnormal vibration:
stop the machine immediately!
Improper attachment of the wheel. Install the wheel as instructed in this manual.
Tighten the bolt to secure the wheel rmly.
The drive system does not work
correctly.
Ask your local authorized service center for repair.
Cutting tool and motor cannot stop:
Remove the battery cartridge
immediately!
Electric or electronic malfunction. Remove the battery cartridges, and ask your local
authorized service center for repair.
Poor cutting performance It is time to replace the wheel. Replace the wheel with new one.
Water leaks from the inlet. Water is leaking from the O-ring part. Ask your local authorized service center for repair.
OPTIONAL
ACCESSORIES
CAUTION: These accessories or attachments
are recommended 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.
• Abrasive cut-o󰀨 wheel
• Diamond wheel
• Ring set
• Synchro-belt
• Coupling sleeve
• Box wrench
• Makita genuine battery and charger
NOTE: Some items in the list may be included in the
tool package as standard accessories. They may
di󰀨er from country to country.
MAKITA LIMITED WARRANTY
Please refer to the annexed warranty sheet for the
most current warranty terms applicable to this product.
If annexed warranty sheet is not available, refer to the
warranty details set forth at below website for your
respective country.
United States of America: www.makitatools.com
Canada: www.makita.ca
Other countries: www.makita.com

17 ESPAÑOL
ESPAÑOL (Instrucciones originales)
ESPECIFICACIONES
Modelo: GEC01
Diámetro de la rueda 355 mm (14″)
Grosor máx. de la rueda 5,0 mm (3/16″)
Profundidad de corte máxima 127 mm (5″)
Velocidad especicada 5 300 r/min
Tensión nominal 72 V - 80 V c.c. máx.
Presión máxima permitida del agua para alimentación 5,0 bars
Longitud total 786 mm (31″)
Peso neto 12,3 kg - 14,1 kg (27,1 lbs - 31,1 lbs)
• Debido a nuestro continuo programa de investigación y desarrollo, las especicaciones aquí incluidas están
sujetas a cambio sin previo aviso.
• Las especicaciones pueden variar de país a país.
• El peso puede variar en función de los accesorios, incluido el cartucho de batería. En la tabla se muestra la
combinación de peso más ligero y más pesado conforme al procedimiento 01/2014 de EPTA.
Cartucho de batería y cargador aplicables
Cartucho de batería BL4040 / BL4050F* / BL4080F*
* : Batería recomendada
Cargador DC40RA / DC40RB / DC40RC
• Algunos de los cartuchos de batería y cargadores enumerados arriba podrían no estar disponibles depen-
diendo de su área de residencia.
ADVERTENCIA: Use únicamente los cartuchos de batería y los cargadores indicados arriba. El uso de
cualquier otro cartucho de batería y cargador podría ocasionar una lesión y/o un incendio.
ADVERTENCIAS DE
SEGURIDAD
Advertencias generales de
seguridad para herramientas
eléctricas
ADVERTENCIA: Lea todas las advertencias
de seguridad, instrucciones, ilustraciones y espe-
cicaciones suministradas con esta herramienta
eléctrica. El no seguir todas las instrucciones indi-
cadas a continuación podría ocasionar una descarga
eléctrica, incendio y/o lesiones graves.
Conserve todas las advertencias
e instrucciones como referencia
en el futuro.
En las advertencias, el término “herramienta eléctrica”
se reere a su herramienta eléctrica de funcionamiento
con conexión a la red eléctrica (con cableado eléctrico)
o herramienta eléctrica de funcionamiento a batería
(inalámbrica).
Seguridad en el área de trabajo
1. Mantenga el área de trabajo limpia y bien ilu-
minada. Las áreas oscuras o desordenadas son
propensas a accidentes.
2. No utilice las herramientas eléctricas en
atmósferas explosivas, tal como en la presen-
cia de líquidos, gases o polvo inamables. Las
herramientas eléctricas crean chispas que pueden
prender fuego al polvo o los humos.
3. Mantenga a los niños y curiosos alejados
mientras utiliza una herramienta eléctrica. Las
distracciones le pueden hacer perder el control.
Seguridad eléctrica
1.
Las clavijas de conexión de las herramientas
eléctricas deberán encajar perfectamente en la
toma de corriente. No modique nunca la clavija
de conexión de ninguna forma. No utilice ninguna
clavija adaptadora con herramientas eléctricas
que tengan conexión a tierra (puesta a tierra). La
utilización de clavijas no modicadas y que encajen
perfectamente en la toma de corriente reducirá el
riesgo de que se produzca una descarga eléctrica.
2. Evite tocar con el cuerpo supercies conectadas
a tierra o puestas a tierra tales como tubos, radia-
dores, cocinas y refrigeradores. Si su cuerpo es
puesto a tierra o conectado a tierra existirá un mayor
riesgo de que sufra una descarga eléctrica.

18 ESPAÑOL
3. No exponga las herramientas eléctricas a la
lluvia ni a condiciones húmedas. La entrada de
agua en una herramienta eléctrica aumentará el
riesgo de que se produzca una descarga eléctrica.
4. No maltrate el cable. Nunca utilice el cable
para transportar, jalar o desconectar la herra-
mienta eléctrica. Mantenga el cable alejado del
calor, aceite, objetos cortantes o piezas móvi-
les. Los cables dañados o enredados aumentan
el riesgo de sufrir una descarga eléctrica.
5.
Cuando utilice una herramienta eléctrica en
exteriores, utilice un cable de extensión apro-
piado para uso en exteriores. La utilización de un
cable apropiado para uso en exteriores reducirá el
riesgo de que se produzca una descarga eléctrica.
6. Si no es posible evitar usar una herramienta
eléctrica en condiciones húmedas, utilice un
alimentador protegido con interruptor de cir-
cuito de falla a tierra (ICFT). El uso de un ICFT
reduce el riesgo de descarga eléctrica.
7. Las herramientas eléctricas pueden producir
campos electromagnéticos (CEM) que no son
dañinos para el usuario. Sin embargo, si los
usuarios tienen marcapasos y otros dispositivos
médicos similares, deberán consultar al fabricante
de su dispositivo y/o a su médico antes de operar
esta herramienta eléctrica.
Seguridad personal
1. Manténgase alerta, preste atención a lo que
está haciendo y utilice su sentido común
cuando opere una herramienta eléctrica. No
utilice una herramienta eléctrica cuando esté
cansado o bajo la inuencia de drogas, alco-
hol o medicamentos. Un momento de distracción
mientras opera las herramientas eléctricas puede
terminar en una lesión grave.
2. Use equipo de protección personal. Póngase
siempre protección para los ojos. El equipo
protector tal como máscara contra el polvo, zapa-
tos de seguridad antiderrapantes, casco rígido y
protección para oídos utilizado en las condiciones
apropiadas reducirá el riesgo de lesiones.
3.
Impida el encendido accidental. Asegúrese
de que el interruptor esté en la posición de
apagado antes de conectar a la alimentación
eléctrica y/o de colocar el cartucho de batería,
así como al levantar o cargar la herramienta.
Cargar las herramientas eléctricas con su dedo
en el interruptor o enchufarlas con el interruptor
encendido hace que los accidentes sean comunes.
4. Retire cualquier llave de ajuste o llave de
apriete antes de encender la herramienta. Una
llave de ajuste o llave de apriete que haya sido
dejada puesta en una parte giratoria de la herra-
mienta eléctrica puede ocasionar alguna lesión.
5.
No utilice la herramienta donde no alcance.
Mantenga los pies sobre suelo rme y el equilibrio
en todo momento. Esto permite un mejor control de la
herramienta eléctrica en situaciones inesperadas.
6. Use una vestimenta apropiada. No use ropa
suelta ni alhajas. Mantenga el cabello, la ropa
y los guantes alejados de las piezas móviles.
Las prendas de vestir holgadas, las alhajas y
el cabello largo suelto podrían engancharse en
estas piezas móviles.
7.
Si dispone de dispositivos para la conexión de
equipos de extracción y recolección de polvo,
asegúrese de conectarlos y utilizarlos debida-
mente. Hacer uso de la recolección de polvo puede
reducir los riesgos relacionados con el polvo.
8. No permita que la familiaridad adquirida
debido al uso frecuente de las herramientas
haga que se sienta conado e ignore los prin-
cipios de seguridad de las herramientas. Un
descuido podría ocasionar una lesión grave en
una fracción de segundo.
9. Utilice siempre gafas protectoras para prote-
ger sus ojos de lesiones al usar herramientas
eléctricas. Las gafas deben cumplir con la
Norma ANSI Z87.1 en EUA.
Es responsabilidad del empleador imponer
el uso de equipos protectores de seguridad
apropiados a los operadores de la herramienta
y demás personas cerca del área de trabajo.
Mantenimiento y uso de la herramienta eléctrica
1. No fuerce la herramienta eléctrica. Utilice la
herramienta eléctrica correcta para su aplica-
ción. La herramienta eléctrica adecuada hará un
mejor trabajo y de forma más segura a la veloci-
dad para la que ha sido fabricada.
2.
No utilice la herramienta eléctrica si el interrup-
tor no la enciende y apaga. Cualquier herramienta
eléctrica que no pueda ser controlada con el inte-
rruptor es peligrosa y debe ser reemplazada.
3. Desconecte la clavija de la fuente de alimen-
tación y/o retire la batería de la herramienta
eléctrica, en caso de ser removible, antes de
realizar ajustes, cambiar accesorios o almace-
nar las herramientas eléctricas. Tales medidas
de seguridad preventivas reducirán el riesgo
de poner en marcha la herramienta eléctrica de
forma accidental.
4. Guarde la herramienta eléctrica que no use
fuera del alcance de los niños y no permita
que las personas que no están familiarizadas
con ella o con las instrucciones la operen. Las
herramientas eléctricas son peligrosas en manos
de personas que no saben operarlas.
5. Dé mantenimiento a las herramientas eléctri-
cas y los accesorios. Compruebe que no haya
piezas móviles desalineadas o estancadas,
piezas rotas y cualquier otra condición que
pueda afectar al funcionamiento de la herra-
mienta eléctrica. Si la herramienta eléctrica
está dañada, haga que la reparen antes de
utilizarla. Muchos de los accidentes son ocasio-
nados por no dar un mantenimiento adecuado a
las herramientas eléctricas.
6. Mantenga las herramientas de corte limpias
y losas. Si recibe un mantenimiento adecuado
y tiene los bordes alados, es probable que la
herramienta se atasque menos y sea más fácil
controlarla.
7. Utilice la herramienta eléctrica, los accesorios
y las brocas de acuerdo con estas instruccio-
nes, considerando las condiciones laborales
y el trabajo a realizar. Si utiliza la herramienta
eléctrica para realizar operaciones distintas de
las indicadas, podrá presentarse una situación
peligrosa.

19 ESPAÑOL
8. Mantenga los mangos y supercies de asi-
miento secos, limpios y libres de aceite o
grasa. Los mangos y supercies de asimiento
resbalosos no permiten una manipulación segura
ni el control de la herramienta en situaciones
inesperadas.
9. Cuando vaya a utilizar esta herramienta, evite
usar guantes de trabajo de tela ya que éstos
podrían atorarse. Si los guantes de trabajo de
tela llegaran a atorarse en las piezas móviles,
esto podría ocasionar lesiones personales.
Uso y cuidado de la herramienta a batería
1. Recargue sólo con el cargador especicado
por el fabricante. Un cargador que es adecuado
para un solo tipo de batería puede generar riesgo
de incendio al ser utilizado con otra batería.
2. Utilice las herramientas eléctricas solamente
con las baterías designadas especícamente
para ellas. La utilización de cualquier otra batería
puede crear un riesgo de lesiones o incendio.
3. Cuando no se esté usando la batería, mantén-
gala alejada de otros objetos metálicos, como
sujetapapeles (clips), monedas, llaves, clavos,
tornillos u otros objetos pequeños de metal
los cuales pueden actuar creando una cone-
xión entre las terminales de la batería. Originar
un cortocircuito en las terminales puede causar
quemaduras o incendios.
4. En condiciones abusivas, podrá escapar
líquido de la batería; evite tocarlo. Si lo toca
accidentalmente, enjuague con agua. Si hay
contacto del líquido con los ojos, busque asis-
tencia médica. Puede que el líquido expulsado
de la batería cause irritación o quemaduras.
5. No utilice una herramienta ni una batería que
estén dañadas o hayan sido modicadas. Las
baterías dañadas o modicadas podrían oca-
sionar una situación inesperada provocando un
incendio, explosión o riesgo de lesiones.
6. No exponga la herramienta ni la batería al
fuego ni a una temperatura excesiva. La expo-
sición al fuego o a una temperatura superior a los
130 °C podría causar una explosión.
7. Siga todas las instrucciones para la carga y
evite cargar la herramienta o la batería fuera
del rango de temperatura especicado en
las instrucciones. Una carga inadecuada o a
una temperatura fuera del rango especicado
podría dañar la batería e incrementar el riesgo de
incendio.
Servicio
1. Haga que una persona calicada repare la
herramienta eléctrica utilizando sólo piezas de
repuesto idénticas. Esto asegura que se man-
tenga la seguridad de la herramienta eléctrica.
2. Nunca dé servicio a baterías que estén daña-
das. El servicio a las baterías solamente deberá
ser efectuado por el fabricante o un agente de
servicio autorizado.
3. Siga las instrucciones para la lubricación y
cambio de accesorios.
4. No modique ni intente reparar el aparato ni el
paquete de baterías salvo como se indique en
las instrucciones para el uso y cuidado.
Advertencias de seguridad para el
cortador inalámbrico
1. El protector que se incluye con la herramienta
debe quedar bien instalado y colocado en
la herramienta eléctrica para garantizar la
máxima seguridad, de tal manera que el opera-
dor esté lo menos expuesto posible a la rueda.
Usted y las personas alrededor deberán man-
tenerse alejados del plano de la rueda girato-
ria. El protector ayuda a proteger al operador de
los fragmentos rotos de la rueda y del contacto
accidental con la misma.
2. Use solamente ruedas de corte de diamante
o reforzadas adheridas para su herramienta
eléctrica. El que un accesorio pueda ensam-
blarse en su herramienta eléctrica no garantiza
una operación segura.
3. La velocidad especicada para el accesorio
debe ser por lo menos la misma que la veloci-
dad máxima marcada en la herramienta eléc-
trica. Los accesorios que vayan a una velocidad
mayor que su velocidad especicada pueden
romperse y desintegrase.
4.
Las ruedas deben usarse únicamente para las
aplicaciones recomendadas. Por ejemplo, no
haga operaciones de esmerilado con la parte
plana de la rueda cortadora. Las ruedas abrasivas
de corte están diseñadas para el esmerilado perifé-
rico; las fuerzas aplicadas lateralmente a estas rue-
das pueden ocasionar que se rompan en pedazos.
5. Siempre utilice bridas de rueda sin daños
que sean del diámetro correcto para la rueda
seleccionada. Las bridas de rueda adecuadas
soportan la rueda reduciendo así la posibilidad de
rotura de la rueda.
6. No utilice ruedas reforzadas que estén desgas-
tadas de herramientas eléctricas más grandes.
Las ruedas diseñadas para una herramienta eléc-
trica más grande no son adecuadas para la velo-
cidad mayor de una herramienta más pequeña y
pueden reventarse.
7. El diámetro externo y el grosor de su acceso-
rio debe estar dentro de la capacidad indicada
de su herramienta eléctrica. Los accesorios de
tamaño incorrecto no podrán ser protegidos ni
controlados adecuadamente.
8.
El tamaño del eje de las ruedas y bridas se debe
ajustar adecuadamente al eje de la herramienta
eléctrica. Las ruedas y bridas con oricios para ejes
que no se ajusten al equipo de montaje de la herra-
mienta eléctrica se desequilibrarán, vibrarán excesi-
vamente y podrán causar la pérdida de control.
9. No use ruedas dañadas. Antes de cada uso,
inspeccione las ruedas para vericar que no
haya grietas ni astillas. Si la herramienta eléc-
trica o la rueda llegan a caerse, inspeccione
que no haya daños o instale una rueda que no
esté dañada. Después de inspeccionar e insta-
lar la rueda, colóquense usted y las personas
alrededor lejos del plano de la rueda giratoria
y haga funcionar la herramienta eléctrica a
la velocidad máxima sin carga durante un
minuto. Las ruedas dañadas por lo general se
romperán durante este tiempo de prueba.

20 ESPAÑOL
10. Use equipo de protección personal.
Dependiendo de la aplicación, use careta
y gafas protectoras o de seguridad. Según
resulte apropiado, use máscara contra polvo,
protectores para oídos, guantes y mandil de
trabajo que puedan detener pequeños frag-
mentos abrasivos o de la pieza de trabajo.
La protección para los ojos deberá ser capaz de
detener los residuos que salgan volando a causa
de las distintas operaciones. La máscara contra
polvo o respirador deberá ser capaz de ltrar las
partículas generadas durante su operación. La
exposición prolongada al ruido de alta intensidad
podrá provocar pérdida auditiva.
11. Mantenga a las personas alrededor a una
distancia segura del área de trabajo. Cualquier
persona que ingrese al área de trabajo deberá
usar equipo de protección personal. Los frag-
mentos de la pieza de trabajo o de una rueda rota
podrán salir proyectados más allá del área inme-
diata de operación y causar lesiones.
12.
Cuando realice una operación en la que el acceso-
rio de corte pueda entrar en contacto con cableado
oculto, sujete la herramienta eléctrica únicamente
por las supercies de sujeción aisladas. Si el
accesorio de corte entra en contacto con un cable con
corriente, las piezas metálicas expuestas de la herra-
mienta eléctrica se cargarán también de corriente y el
operador podrá recibir una descarga eléctrica.
13. Nunca deje la herramienta eléctrica hasta que
el accesorio se haya detenido completamente.
La rueda giratoria puede agarrar la supercie y
jalar la herramienta eléctrica haciendo que usted
pierda el control sobre ella.
14.
No tenga encendida la herramienta eléctrica mien-
tras la lleva cargando a un costado. El contacto
accidental con el accesorio giratorio podría enganchar
su ropa y jalar el accesorio hacia su cuerpo.
15. Limpie regularmente los oricios de ventila-
ción de la herramienta eléctrica. El ventilador
del motor atraerá el polvo hacia el interior de la
carcasa y la acumulación excesiva de polvo metá-
lico podrá ocasionar riesgos eléctricos.
16. No utilice la herramienta eléctrica cerca de
materiales inamables. Las chispas pueden
prender fuego a estos materiales.
Retrocesos bruscos y advertencias relacionadas
El retroceso brusco es una reacción repentina a un atora-
miento o enganchamiento de la rueda giratoria. El atora-
miento o enganchamiento ocasiona un rápido atascamiento
de la rueda giratoria que a su vez causa que la herramienta
eléctrica descontrolada sea forzada en la dirección opuesta
al giro de la rueda en el punto de atascamiento.
Por ejemplo, si una rueda abrasiva queda enganchada o
atorada por la pieza de trabajo, el borde de la rueda que
está entrando en el punto de atoramiento puede hundirse
en la supercie del material haciendo que la rueda se salga
o salte. La rueda podrá saltar hacia el operador o en direc-
ción contraria a él, dependiendo de la dirección del movi-
miento de la rueda en el punto de atoramiento. Las ruedas
abrasivas también pueden romperse en estas condiciones.
El retroceso brusco es el resultado de un mal uso de
la herramienta eléctrica y/o de procedimientos o con-
diciones de operación incorrectos y pueden evitarse
tomando las precauciones adecuadas tal como se
indica a continuación.
1. Mantenga sujetada rmemente la herramienta
eléctrica y posicione su cuerpo y brazo de
manera que pueda resistir las fuerzas del
retroceso brusco. De estar disponible, utilice
siempre el mango auxiliar para un control
máximo durante un retroceso brusco o reac-
ción de torsión durante la puesta en marcha
de la herramienta. El operador puede controlar
las reacciones de torsión o fuerzas del retroceso
brusco siempre y cuando se tomen las precaucio-
nes adecuadas.
2. Nunca coloque su mano cerca del accesorio
giratorio. El accesorio puede tener un retroceso
brusco sobre su mano.
3. No coloque su cuerpo en línea con la rueda
giratoria. El retroceso brusco proyectará la herra-
mienta en dirección opuesta al movimiento de la
rueda en el punto de enganchamiento.
4. Tenga especial cuidado al trabajar en esqui-
nas, bordes losos, etc. Evite que el accesorio
rebote o se enganche. Las esquinas, bordes
losos o rebotes tienden a enganchar el accesorio
giratorio y ocasionar la pérdida de control o un
retroceso brusco.
5. No coloque una cadena de sierra, disco para
labrar madera, rueda de diamante segmentada
con un espacio periférico de separación mayor
a 10 mm, ni disco de sierra dentado. Dichos
discos generan un retroceso brusco y pérdida del
control con frecuencia.
6. Evite trabar la rueda o aplicar presión exce-
siva. No intente hacer un corte de profundidad
excesiva. Aplicar presión excesiva a la rueda
incrementa la carga y susceptibilidad a que
se tuerza o atore durante el corte, y de que se
genere un retroceso brusco o rotura de la rueda.
7. Cuando la rueda se atore o se interrumpa el
corte por cualquier razón, apague la herra-
mienta eléctrica y sosténgala sin moverla
hasta que la rueda se detenga por completo.
No intente nunca retirar la rueda del corte
mientras la rueda esté moviéndose por-
que podría ocasionar un retroceso brusco.
Investigue y tome medidas correctivas para elimi-
nar la causa del atoramiento de la rueda.
8. Evite reiniciar la operación de corte en la pieza
de trabajo. Permita que la rueda alcance su
velocidad completa y se reintroduzca con
cuidado en el corte. La rueda puede atorarse,
salirse del camino o generar un retroceso brusco
si la herramienta eléctrica es reiniciada estando
en la pieza de trabajo.
9. Proporcione apoyo a los paneles o cualquier
pieza de trabajo de gran tamaño para minimi-
zar el riesgo de que la rueda se atore y dé un
retroceso brusco. Las piezas de trabajo grandes
tienden a hundirse bajo su propio peso. Deben
colocarse soportes bajo la pieza de trabajo a
ambos lados de la rueda, cerca de la línea de
corte y del borde de la pieza de trabajo.
10. Tenga especial cuidado cuando realice un
“corte de penetración” en las paredes existen-
tes u otras áreas ciegas. La parte saliente de la
rueda puede cortar tuberías de gas o agua, así
como cableado eléctrico u objetos que produzcan
un retroceso brusco.