Hitachi G 23SS, G 18SS User Manual
Model Disc Grinder
Modèle Meuleuse à disque
Modelo Amoladora angular
G 18SS•G 23SS
SAFETY INSTRUCTIONS AND INSTRUCTION MANUAL
WARNING
IMPROPER OR UNSAFE use of this power tool can result in death or serious bodily
injury!
This manual contains important information about product safety. Please read and
understand this manual BEFORE operating the power tool. Please keep this manual
available for other users and owners before they use the power tool.
This manual should be stored in safe place
INSTRUCTIONS DE SECURITE ET MODE D’EMPLOI
AVERTISSEMENT
Une utilisation INCORRECTE OU DANGEREUSE de cet outil motorisé peut entraîner la
mort ou de sérieuses blessures corporelles!
Ce mode d’emploi contient d’importantes informations à propos de la sécurité de ce
produit. Prière de lire et de comprendre ce mode d’emploi AVANT d’utiliser l’outil
motorisé. Garder ce mode d’emploi à la disponibilité des autres utilisateurs et propriétaires
avant qu’ils utilisent l’outil motorisé. Ce mode d’emploi doit être conservé dans un
endroit sûr.
INSTRUCCIONES DE SEGURIDAD Y MANUAL DE INSTRUCCIONES
ADVERTENCIA
¡La utilización INAPROPIADA O PELIGROSA de esta herramienta eléctrica puede
resultar en lesiones de gravedad o la muerte!
Este manual contiene información importante sobre la seguridad del producto. Lea y
comprenda este manual ANTES de utilizar la herramienta eléctrica. Guarde este manual
para que puedan leerlo otras personas antes de utilizar la herramienta eléctrica. Este
manual debe ser guardado en un lugar seguro.
DOUBLE INSULATION
DOUBLE ISOLATION
AISLAMIENTO DOBLE
English
CONTENTS
Page
IMPORTANT SAFETY INFORMATION ................ 4
MEANINGS OF SIGNAL WORDS ........................ 4
SAFETY ...................................................................... 4
GENERAL POWER TOOL SAFETY WARNINGS ..... 4
SAFETY WARNINGS COMMON FOR
GRINDING OR ABRASIVE CUTTING-OFF
OPERATIONS ................................................. 5
KICKBACK AND RELATED WARNINGS .............. 6
SAFETY WARNINGS SPECIFIC FOR
GRINDING AND ABRASIVE CUTTING-OFF
OPERATIONS ................................................. 6
ADDITIONAL SAFETY WARNINGS
SPECIFIC FOR ABRASIVE CUTTING-OFF
OPERATIONS ................................................. 7
GENERAL SAFETY INSTRUCTIONS FOR
GRINDERS ...................................................... 7
SPECIFIC SAFETY RULES AND
SYMBOLS ....................................................... 7
DOUBLE INSULATION FOR SAFER
Page
OPERATION ................................................... 9
FUNCTIONAL DESCRIPTION .................................. 10
NAME OF PARTS ................................................ 10
SPECIFICATIONS ................................................ 10
ASSEMBLY AND OPERATION ............................... 11
APPLICATIONS ................................................... 11
PRIOR TO OPERATION ....................................... 11
GRINDER OPERATION ....................................... 12
DEPRESSED CENTER WHEEL
ASSEMBLY AND DISASSEMBLY ............... 12
MAINTENANCE AND INSPECTION ....................... 13
ACCESSORIES ......................................................... 14
STANDARD ACCESSORIES ............................... 14
OPTIONAL ACCESSORIES...sold separately .... 14
PARTS LIST .............................................................. 41
Français
INFORMATIONS IMPORTANTES DE
SÉCURITÉ ..................................................... 15
SIGNIFICATION DES MOTS
D’AVERTISSEMENT .................................... 15
SECURITE ................................................................ 15
AVERTISSEMENTS DE SÉCURITÉ GÉNÉRAUX
CONCERNANT LES OUTILS
ÉLECTRIQUES .............................................. 15
AVERTISSEMENTS DE SÉCURITÉ COURANTS
POUR LES OPÉRATIONS DE MEULAGE
OU DE DÉCOUPE PAR ABRASION ............. 17
RECUL DE L'APPAREIL ET AVERTISSEMENTS
ASSOCIÉS .................................................... 17
AVERTISSEMENTS DE SÉCURITÉ SPÉCIFIQUES
AUX OPÉRATIONS DE MEULAGE ET DE
DÉCOUPE PAR ABRASION .......................... 18
AVERTISSEMENTS DE SÉCURITÉ SPÉCIFIQUES
AUX OPÉRATIONS DE DÉCOUPE PAR
ABRASION .................................................... 18
CONSIGNES DE SECURITE GENERALES
RELATIVES AUX MEULEUSES DROITES ... 18
TABLE DES MATIERES
Page
REGLES DE SECURITE SPECIFIQUES
Page
ET SYMBOLES ............................................. 19
DOUBLE ISOLATION POUR UN
FONCTIONNEMENT PLUS SUR ................. 20
DESCRIPTION FONCTIONNELLE ........................... 22
NOM DES PARTIES ............................................ 22
SPECIFICATIONS ................................................ 22
ASSEMBLAGE ET FONCTIONNEMENT ................ 23
UTILISATIONS .................................................... 23
AVANT L’UTILISATION ...................................... 23
UTILISATION DE LA MEULEUSE À DISQUE .... 24
ASSEMBLAGE ET DESASSEMBLAGE
DE LA MEULE A DEPRESSION
CENTRALE .................................................... 25
ENTRETIEN ET INSPECTION .................................. 26
ACCESSOIRES ......................................................... 27
ACCESSOIRES STANDARD ............................... 27
ACCESSOIRES SUR OPTION...vendus
séparément .................................................. 27
LISTE DES PIECES ................................................... 41
Español
INFORMACIÓN IMPORTANTE SOBRE
SEGURIDAD ................................................. 28
SIGNIFICADO DE LAS PALABRAS DE
SEÑALIZACIÓN ............................................ 28
SEGURIDAD ............................................................. 28
ADVERTENCIAS DE SEGURIDAD GENERAL DE
LA HERRAMIENTA ELÉCTRICA .................. 28
ADVERTENCIAS COMUNES DE SEGURIDAD
PARA LAS OPERACIONES DE MOLIDO O
CORTE ABRASIVO ....................................... 30
REBOTE Y ADVERTENCIAS RELACIONADAS .... 30
ADVERTENCIAS DE SEGURIDAD ESPECÍFICAS
PARA LAS OPERACIOENS DE MOLIDO Y
CORTE ABRASIVO ........................................ 31
ADVERTENCIAS DE SEGURIDAD ADICIONALES
PARA LAS OPERACIONES DE CORTE
ABRASIVO .................................................... 31
INSTRUCCIONES GENERALES DE SEGURIDAD
PARA AMOLADORAS .................................. 31
NORMAS Y SÍMBOLOS ESPECÍFICOS
DE SEGURIDAD ........................................... 32
Página
ÍNDICE
AISLAMIENTO DOBLE PARA OFRECER UNA
OPERACIÓN MÁS SEGURA ........................ 33
DESCRIPCIÓN FUNCIONAL .................................... 35
NOMENCLATURA ............................................... 35
ESPECIFICACIONES ............................................ 35
MONTAJE Y OPERACIÓN ...................................... 36
APLICACIONES ................................................... 36
ANTES DE LA OPERACIÓN ................................ 36
OPERACIÓN DE LA AMOLADORA
ANGULAR .................................................... 37
MONTAJE Y DESMONTAJE DE LA
RUEDA DE DISCO ABOMBADO ................. 38
MANTENIMIENTO E INSPECCIÓN ........................ 39
ACCESORIOS ........................................................... 40
ACCESORIOS ESTÁNDAR ................................. 40
ACCESORIOS OPCIONALES...De venta por
separado ....................................................... 40
LISTA DE PIEZAS .................................................... 41
Página
English
IMPORTANT SAFETY INFORMATION
Read and understand all of the safety precautions, warnings and operating instructions in the Instruction Manual
before operating or maintaining this power tool.
Most accidents that result from power tool operation and maintenance are caused by the failure to observe basic
safety rules or precautions. An accident can often be avoided by recognizing a potentially hazardous situation
before it occurs, and by observing appropriate safety procedures.
Basic safety precautions are outlined in the “SAFETY” section of this Instruction Manual and in the sections which
contain the operation and maintenance instructions.
Hazards that must be avoided to prevent bodily injury or machine damage are identified by WARNINGS on the
power tool and in this Instruction Manual.
NEVER use this power tool in a manner that has not been specifically recommended by HITACHI.
MEANINGS OF SIGNAL WORDS
WARNING indicates a potentially hazardous situations which, if ignored, could result in death or serious injury.
CAUTION indicates a potentially hazardous situations which, if not avoided, may result in minor or moderate
injury, or may cause machine damage.
NOTE emphasizes essential information.
SAFETY
GENERAL POWER TOOL SAFETY WARNINGS
WARNING:
Read all safety warnings and 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.
1) Work area safety
a) Keep work area clean and well lit.
Cluttered or dark areas invite accidents.
b) Do not operate power tools in explosive
atmospheres, such as in the presence of
flammable liquids, gases or dust.
Power tools create sparks which may ignite
the dust of fumes.
c) Keep children and bystanders away while
operating a power tool.
Distractions can cause you to lose control.
2) Electrical safety
a) 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 risk of electric shock.
b) 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.
4
c) Do not expose power tools to rain or wet
conditions.
Water entering a power tool will increase the
risk of electric shock.
d) 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.
e) 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.
f) If operating a power tool in a damp location
is unavoidable, use a residual current device
(RCD) protected supply.
Use of an RCD reduces the risk of electric shock.
3) Personal safety
a) 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.
English
A moment of inattention while operating
power tools may result in serious personal
injury.
b) Use personal protective equipment. Always
wear eye protection.
Protective equipment such as dust mask, nonskid safety shoes, hard hat, or hearing
protection used for appropriate conditions
will reduce personal injuries.
c) Prevent unintentional starting. Ensure the
switch is in the off-position before connecting
to power source and/or battery pack, picking
up or carrying the tool.
Carrying power tools with your finger on the
switch or energising power tools that have
the switch on invites accidents.
d) 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.
e) Do not overreach. Keep proper footing and
balance at all times.
This enables better control of the power tool
in unexpected situations.
f) Dress properly. Do not wear loose clothing
or jewellery. Keep your hair, clothing and
gloves away from moving parts.
Loose clothes, jewellery or long hair can be
caught in moving parts.
g) 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.
4) Power tool use and care
a) 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.
b) 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.
c) 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.
d) 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.
e) 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.
f) Keep cutting tools sharp and clean.
Properly maintained cutting tools with sharp
cutting edges are less likely to bind and are
easier to control.
g) 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.
5) Service
a) 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.
SAFETY WARNINGS COMMON FOR
GRINDING OR ABRASIVE CUTTING-OFF
OPERATIONS
a) This power tool is intended to function as a
grinder or cut-off tool. Read all safety warnings,
instructions, illustrations and specifications
provided with this power tool.
Failure to follow all instructions listed below may
result in electric shock, fire and/or serious injury.
b) Operations such as sanding, wire brushing or
polishing are not recommended to be performed
with this power tool.
Operations for which the power tool was not
designed may create a hazard and cause personal
injury.
c) Do not use accessories which are not specifically
designed and recommended by the tool
manufacturer.
Just because the accessory can be attached to
your power tool, it does not assure safe operation.
d) 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 fly apart.
e) 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.
f) The arbour size of wheels, flanges, backing pads
or any other accessory must properly fit the spindle
of the power tool.
5
English
Accessories 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.
g) Do not use a damaged accessory. Before each use
inspect the accessory such as abrasive wheels for
chips and cracks, backing pad for cracks, tear or
excess wear, wire brush for loose or cracked
wires. If power tool or accessory is dropped,
inspect for damage or install an undamaged
accessory. After inspecting and installing an
accessory, position yourself and bystanders away
from the plane of the rotating accessory and run
the power tool at maximum no-load speed for
one minute.
Damaged accessories will normally break apart
during this test time.
h) Wear personal protective equipment. Depending
on application, use face shield, safety goggles or
safety glasses. As appropriate, wear dust mask,
hearing protectors, gloves and workshop apron
capable of stopping small abrasive or workpiece
fragments.
The eye protection must be capable of stopping
flying debris generated by various operations. The
dust mask or respirator must be capable of filtrating
particles generated by your operation. Prolonged
exposure to high intensity noise may cause hearing
loss.
i) 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 accessory
may fly away and cause injury beyond immediate
area of operation.
j) Hold power tool by insulated gripping surfaces
only, when performing an operation where the
cutting accessory may contact hidden wiring or
its own cord.
Cutting accessory contacting a”live” wire may
make exposed metal parts of the power tool “live”
and shock the operator.
k) Position the cord clear of the spinning accessory.
If you lose control, the cord may be cut or snagged
and your hand or arm may be pulled into the
spinning accessory.
l) Never lay the power tool down until the accessory
has come to a complete stop.
The spinning accessory may grab the surface and
pull the power tool out of your control.
m) 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.
n) 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.
6
o) Do not operate the power tool near flammable
materials.
Sparks could ignite these materials.
p) Do not use accessories that require liquid coolants.
Using water or other liquid coolants may result
in electrocution or shock.
KICKBACK AND RELATED WARNINGS
Kickback is a sudden reaction to a pinched or snagged
rotating wheel, backing pad, brush or any other
accessory. Pinching or snagging causes rapid stalling of
the rotating accessory which in turn causes the
uncontrolled power tool to be forced in the direction
opposite of the accessory’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 movement 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.
a) Maintain a firm 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
kickback forces, if proper precautions are taken.
b) Never place your hand near the rotating accessory.
Accessory may kickback over your hand.
c) Do not position your body in the area where
power tool will move if kickback occurs.
Kickback will propel the tool in direction opposite
to the wheel’s movement at the point of snagging.
d) 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.
e) Do not attach a saw chain woodcarving blade or
toothed saw blade.
Such blades create frequent kickback and loss of
control.
SAFETY WARNINGS SPECIFIC FOR
GRINDING AND ABRASIVE CUTTING-OFF
OPERATIONS
a) Use only wheel types that are recommended for
your power tool and the specific guard designed
for the selected wheel.
Wheels for which the power tool was not designed
cannot be adequately guarded and are unsafe.
English
b) The guard must be securely attached to the power
tool and positioned for maximum safety, so the
least amount of wheel is exposed towards the
operator.
f) Use extra caution when making a “pocket cut”
into existing walls or other blind areas.
The protruding wheel may cut gas or water pipes,
electrical wiring or objects that can cause kickback.
The guard helps to protect operator from broken
wheel fragments and accidental contact with wheel.
c) Wheels must be used only for recommended
applications. For example: do not grind with the
side of cut-off wheel.
Abrasive cut-off wheels are intended for peripheral
grinding, side forces applied to these wheels may
cause them to shatter.
d) Always use undamaged wheel flanges that are of
correct size and shape for your selected wheel.
Proper wheel flanges support the wheel thus
reducing the possibility of wheel breakage. Flanges
for cut-off wheels may be different from grinding
wheel flanges.
e) Do not use worn down wheels from larger power
tools.
Wheel intended for larger power tool is not suitable
for the higher speed of a smaller tool and may burst.
ADDITIONAL SAFETY WARNINGS
SPECIFIC FOR ABRASIVE CUTTING-OFF
OPERATIONS
a) Do not “jam” the cut-off 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 blinding of the wheel
in the cut and the possibility of kickback or wheel
breakage.
b) Do not position your body in line with and behind
the rotating wheel.
When the wheel, at the point of operation, is
moving away from your body, the possible kickback
may propel the spinning wheel and the power tool
directly at you.
c) When wheel is binding or when interrupting a cut
for any reason, switch off the power tool and hold
the power tool motionless until the wheel comes
to a complete stop. Never attempt to remove the
cut-off 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.
d) Do not restart the cutting operation in the
workpiece. Let the wheel reach full speed and
carefully reenter the cut.
The wheel may bind, walk up or kickback if the
power tool is restarted in the workpiece.
e) Support panels or any oversized workpiece to
minimize the risk of wheel pinching and kickback.
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
GENERAL SAFETY INSTRUCTIONS FOR
GRINDERS
– Check that speed marked on the wheel is equal
to or greater than the rated speed of the grinder;
– Ensure that the wheel dimensions are compatible
with the grinder;
– Abrasive wheels shall be stored and handled with
care in accordance with manufacturer’s instructions;
– Inspect the grinding wheel before use, do not use
chipped, cracked or otherwise defective products;
– Ensure that mounted wheels and points are fitted
in accordance with the manufacturer’s instructions;
– Ensure that blotters are used when they are
provided with the bonded abrasive product and
when they are required;
– Ensure that the abrasive product is correctly
mounted and tightened before use and run the
tool at no-load for 30 s in a safe position, stop
immediately if there is considerable vibration or
if other defects are detected. If this condition occurs,
check the machine to determine the cause;
– If a guard is equipped with the tool never use the
tool without such a guard;
– Do not use separate reducing bushings or adapters
to adapt large hole abrasive wheels;
– For tools intended to be fitted with threaded hole
wheel, ensure that the thread in the wheel is long
enough to accept the spindle length;
– Check that the work piece is properly supported;
– Do not use cutting off wheel for side grinding;
– Ensure that sparks resulting from use do not create
a hazard e.g. do not hit persons, or ignite flammable
substances;
– Ensure that ventilation openings are kept clear
when working in dusty conditions, if it should
become necessary to clear dust, first disconnect
the tool from the mains supply (use non metallic
objects) and avoid damaging internal parts;
– Always use eye and ear protection. Other personal
protective equipment such as dust mask, gloves,
helmet and apron should be worn;
– Pay attention to the wheel that continues to rotate
after the tool is switched off.
SPECIFIC SAFETY RULES AND SYMBOLS
1. ALWAYS use proper guard with grinding wheel. A
guard protects operator from broken wheel fragments.
2. Accessories must be rated for at least the speed
recommended on the tool warning label. Wheels
and other accessories running over rated speed
can fly apart and cause injury.
of the workpiece on both sides of the wheel.
7
English
3. Hold power tools by insulated gripping surfaces
when performing an operation where the cutting
tool may contact hidden wiring or its own cord.
Contact with a “live” wire will make exposed metal
parts of the tool “live” and shock the operator.
4. ALWAYS wear ear protectors when using the tool
for extended periods.
Prolonged exposure to high intensity
noise can cause hearing loss.
13. Blades and accessories must be securely mounted
to the tool.
Prevent potential injuries to yourself or others. Blades,
cutting implements and accessories which have been
mounted to the tool should be secure and tight.
14. Keep motor air vent clean.
The tool’s motor air vent must be kept clean so
that air can freely flow at all times. Check for dust
build-up frequently.
15. Operate power tools at the rated voltage.
Operate the power tool at voltages specified on its
5. Use only a depressed center wheel with a rated
capacity which is GREATER than 6,600/min. Using
any wheel a rated capacity LESS than 6,600/min
and/or an incorrect sized wheel (see
SPECIFICATIONS at page 10) may result in wheel
breakage, flying wheel fragments, and resulting
in death or serious injury.
6. NEVER touch moving parts.
NEVER place your hands, fingers or
other body parts near the tool’s moving
parts.
nameplate.
If using the power tool at a higher voltage than
the rated voltage, it will result in abnormally fast
motor revolution and may damage the unit and
the motor may burn out.
16. NEVER use a tool which is defective or operating
abnormally.
If the tool appears to be operating unusually,
making strange noises, or otherwise appears
defective, stop using it immediately and arrange
for repairs by a Hitachi authorized service center.
17. NEVER leave tool running unattended. Turn power
off.
Don’t leave tool until it comes to a complete stop.
7. NEVER operate without all guards in place.
NEVER operate this tool without all guards or safety
features in place and in proper working order. If
maintenance or servicing requires the removal of a
guard or safety feature, be sure to replace the guard
or safety feature before resuming operation of the tool.
8. Use right tool.
Don’t force small tool or attachment to do the job
of a heavy-duty tool.
Don’t use tool for purpose not intended —for
example— don’t use circular saw for cutting tree
limbs or logs.
9. NEVER use a power tool for applications other
than those specified.
NEVER use a power tool for applications other than
those specified in the Instruction Manual.
10. Handle tool correctly.
Operate the tool according to the instructions
provided herein. Do not drop or throw the tool.
18. Carefully handle power tools.
Should a power tool be dropped or struck against
hard materials inadvertently, it may be deformed,
cracked, or damaged.
19. Do not wipe plastic parts with solvent.
Solvents such as gasoline, thinner benzine, carbon
tetrachloride, and alcohol may damage and crack
plastic parts. Do not wipe them with such solvents.
Wipe plastic parts with a soft cloth lightly
dampened with soapy water and dry thoroughly.
20. NEVER use a depressed center wheel which is cracked
or deformed or worn away (see the MAINTENANCE
AND INSPECTION section on page 13).
21. NEVER use the grinder in places where the sparks
generated by the grinder can cause explosion, such
as where flammable materials or gases are present.
22. NEVER push in the push button while the spindle
is running.
23. ALWAYS wear eye protection that meets the
NEVER allow the tool to be operated by children,
individuals unfamiliar with its operation or
unauthorized personnel.
11. Keep all screws, bolts and covers tightly in place.
Keep all screws, bolts, and plates tightly mounted.
Check their condition periodically.
12. Do not use power tools if the plastic housing or
handle is cracked.
Cracks in the tool’s housing or handle can lead to
electric shock. Such tools should not be used until
repaired.
24. ALWAYS wear a mask or respirator to protect
yourself from dust or potentially harmful particles
generated during the grinding operation.
25. ALWAYS firmly grip the body handle and side
handle while operating the grinder.
26. ALWAYS have a trial run before grinding
commence. (see “Test the grinder before using”
on page 11).
requirement of the latest revision of
ANSI Standard Z87.1.
8
English
27. ALWAYS follow the instructions contained in this
manual when replacing the depressed center wheel.
28. ALWAYS be careful with buried object such as an
underground wiring.
Touching these active wiring or electric cable with
this tool, you may receive an electric shock.
Confirm if there are any buried object such as
electric cable within the wall, floor or ceiling where
you are going to operate here after.
29. Definitions for symbols used on this tool
V ............... volts
Hz ............. hertz
A ............... amperes
no ............. no load speed
W .............. watt
............. Class II Construction
---/min ...... revolutions per minute
DOUBLE INSULATION FOR SAFER
OPERATION
To ensure safer operation of this power tool, HITACHI
has adopted a double insulation design. “Double
insulation” means that two physically separated
insulation systems have been used to insulate the
electrically conductive materials connected to the power
supply from the outer frame handled by the operator.
Therefore, either the symbol “ ” or the words “Double
insulation” appear on the power tool or on the nameplate.
Although this system has no external grounding, you
must still follow the normal electrical safety precautions
given in this Instruction Manual, including not using the
power tool in wet environments.
To keep the double insulation system effective, follow
these precautions:
䡬
䡬
SAVE THESE INSTRUCTIONS
AND
Only HITACHI AUTHORIZED SERVICE CENTER
should disassemble or assemble this power tool,
and only genuine HITACHI replacement parts
should be installed.
Clean the exterior of the power tool only with a
soft cloth moistened with soapy water, and dry
thoroughly.
Never use solvents, gasoline or thinners on plastic
components; otherwise the plastic may dissolve.
MAKE THEM AVAILABLE TO OTHER USERS
AND
OWNERS OF THIS TOOL!
9
English
FUNCTIONAL DESCRIPTION
NOTE:
The information contained in this Instruction Manual is designed to assist you in the safe operation and
maintenance of the power tool.
NEVER operate, or attempt any maintenance on the tool unless you have first read and understood all safety
instructions contained in this manual.
Some illustrations in this Instruction Manual may show details or attachments that differ from those on your
own power tool.
NAME OF PARTS
Housing
Push button
Gear cover
Packing gland
Side handle
Depressed center wheel
SPECIFICATIONS
Model G18SS G23SS
Motor Single-Phase Series Commutator Motor
Power Source Single-Phase 120 V AC 60 Hz
Current 15 A
No-Load Speed 6,000/min
Wheel Size:
external diam.
hole diam.
Weight 9.5 lbs (4.3 kg)
Wheel guard
Fig. 1
7" (180 mm) 9" (230 mm)
7/8" (22 mm) 7/8" (22 mm)
Handle
Switch
Brush Cap
10
ASSEMBLY AND OPERATION
English
APPLICATIONS
䡬
Removal of casting fin and finishing of various type
of steel, bronze and aluminum materials and
castings.
䡬
Grinding of welded sections or sections cut by
means of an acetylene torch.
䡬
Grinding of synthetic resins, slate, brick, marble.
WARNING:
To avoid the risk of serious injury, NEVER use this
grinder with cup wheels and/or saw blades.
PRIOR TO OPERATION
1. Power source
Ensure that the power source to be utilized
conforms to the power source requirements
specified on the product nameplate.
2. Power switch
Ensure that the switch is in the OFF position. If the
plug is connected to a receptacle while the switch
is in the ON position, the power tool will start
operating immediately and can cause serious injury.
3. Extension cord
When the work area is far away from the power
source, use an extension cord of sufficient
thickness and rated capacity. The extension cord
should be kept as short as practicable.
WARNING:
Damaged cord must be replaced or
repaired.
4. Check the receptacle
If the receptacle only loosely accepts the plug, the
receptacle must be repaired. Contact a licensed
electrician to make appropriate repairs.
If such a faulty receptacle is used, it may cause
overheating, resulting in a serious hazard.
5. Check your work environment
Ensure the following before operation;
䡬
No flammable gas, liquid, or object at worksite.
䡬
When grinding thin steel sheet it may cause
a high booming noise.
To avoid such noise, place a rubber mat under
the workpiece.
䡬
Clear the area of children or unauthorized
6. Mounting the wheel guard
personnel.
Be sure to mount the wheel guard at an angle that
will protect the operator’s body from injury by a
broken wheel piece.
[Installing and adjusting the wheel guard]
䡬
Slightly loosen the screw on the wheel guard.
䡬
Install the wheel-guard-locating pin in line
with the across flats of the packing gland, turn
it to the angle suitable for operation, and
make adjustment.
䡬
After the adjustment, ensure that the screw
is securely tightened on the wheel guard in
order to fix it completely.
Wheel guard
Locating pin
Across flats
Packing gland
Fig. 2
WARNING:
If the wheel guard is not attached properly, a
broken wheel may result in and cause death or
serious injury.
7. Thoroughly check that the depressed center wheel
is free of cracks, splits and other abnormalities
before mounting. Make sure it is firmly clamped
and has been properly mounted. Refer to page 12
of this manual for Depressed Center Wheel
Assembly and Disassembly
8. Test the grinder before using.
Before actually beginning the grinding work, test
the grinder by first clearing the area of all other
personnel. Make sure the wheel guard is in place
and that you are wearing eye protection. Turn the
grinder “on”, and make sure the grinder runs
smoothly and shows no abnormalities.
Duration of the trial run is as follows:
When depressed center wheel is replaced
.......................................... 3 minutes or more
When starting daily work
............................................1 minute or more
Hexagonal bar
wrench
11
English
9. Use only properly rated depressed center wheels.
Use only depressed center wheels rated at
6,600/min or more.
Using a depressed center wheel rated less can lead
to wheel disintegration during operation and cause
serious bodily injury.
10. Check the push button.
Make sure that the push button is disengaged by
pushing push button two or three times before
turning on the grinder. (Fig. 5)
CAUTION:
Do not use the entire surface of the depressed
center wheel. Use only the edge of the depressed
center wheel.
5. Move the grinder in the proper direction.
When using a new depressed center wheel in
direction A (Fig. 4), the wheel edge may cut into the
workpiece. In this case, grind in direction B (Fig. 4).
Once the wheel edge is worn, the workpiece can
be ground in both directions.
GRINDER OPERATION
1. Hold the grinder firmly by its handle and side
handle (Fig. 1)
The grinder produces a counterforce which must
be controlled by firmly holding onto the grinder.
2. Turn the grinder “on” (Fig. 3)
While holding the grinder firmly, use one finger to
switch to the “on” position.
Switch ON: Push the locking button forward and
then press the switch lever.
* For continuous use, press the switch
lever. The switch lever is locked by
pushing the locking button forward
once again.
(*For the switch with Lock-On
mechanism.)
Switch OFF: Press and release the switch lever.
NOTE:
The wheel provided (resinoid wheel) is rated as Class
A grain and # 24 grain size. It is most suitable for
heavy grinding of steel and other types of materials.
6. Adjust operation to desired finish.
For a fine finish, decrease pressure by lifting
slightly. Grind slowly and at the appropriate speed.
CAUTION:
The revolving depressed center wheel will create
air turbulence.
Switch lever
Locking button
Do no lay the grinder down in areas of dust or dirt
until it has come to a complete stop.
15° – 30°
AB
Fig. 4
Fig. 3
3. Use light grinding pressure.
There is no need to press hard when grinding.
Usually the grinder’s own weight is sufficient to
allow the required light contact with the surface to
be ground.
WARNING:
Do not press the grinder forcibly against the
surface to be ground. Heavy pressure can result
in wheel breakage and serious injury. It can also
damage the surface being ground or damage the
grinder’s motor.
4. Use proper grinding angle.
Grind only with the wheel’s edge by lifting the
grinder 15° to 30°, as shown in Fig. 4.
12
DEPRESSED CENTER WHEEL ASSEMBLY
AND DISASSEMBLY
WARNING:
Never attempt to assemble or disassemble the
depressed center wheel, unless the power switch
is in the “OFF” position and the electrical cord has
been disconnected from the receptacle.
1. Assembly
(1) Turn the disc grinder upsidedown so that the
spindle is facing upward.
(2) Align the oval-shaped indentation of the wheel
washer with the notched part of the spindle, then
attach them.
(3) Fit the protuberance of the depressed center wheel
onto the wheel washer.
(4) Screw the wheel nut onto the spindle.
(5) While pushing the push button with one hand, lock
the spindle by turning the depressed center wheel
slowly with the other hand.
Tighten the wheel nut by using the supplied
wrench as shown in Fig. 5.
Wrench
Wheel nut
English
Tighten
CAUTION:
Tighten the wheel nut securely and confirm that
the depressed center wheel does not wobble.
2. Disassembly
To remove the depressed center wheel, simply
reverse the above-mentioned procedure.
MAINTENANCE AND INSPECTION
WARNING:
Be sure to switch power OFF and disconnect the plug from the receptacle during maintenance and inspection.
䢇
䢇
Using cracked, deformed or damaged wheels can lead to wheel breakage and resulting serious injury.
1. Replacing the depressed center wheel
Replace the depressed center wheel when it has been
worn out to about 2-3/8" (60mm) in external diameter.
Confirm that there is no crack or any damage to the
depressed center wheel. If there is a crack or a
transformation in the wheel, replace it immediately.
2. Inspecting the screws
Regularly inspect all screws and ensure that they
are fully tightened. Should any of the screws be
loosened, retighten them immediately.
Depressed
center wheel
Wheel
washer
Wheel guard
Spindle
Push button
Fig. 5
3. Confirm that there is no damage in the wheel
guard, the electrical cord and the housing, etc.
Check that the on/off switch operates normally.
4. Inspecting the carbon brushes (Fig. 6)
The motor employs carbon brushes which are
consumable parts. Replace the carbon brush with
a new one when it becomes worn to its wear limit.
Always keep carbon brushes clean and ensure that
they slide freely within the brush holders.
WARNING:
Using this grinder with loosened screws is
extremely dangerous.
13
English
No. of carbon
Wear limit
0.67” (17mm)
CAUTION:
Using this grinder with a carbon brush which is
worn in excess of the wear limit will damage the
motor.
NOTE:
Use HITACHI carbon brush No. 38 indicated in Fig.
6.
䡬
Replacing carbon brushes:
Remove the brush caps (Fig. 1) with a slotted
screwdriver. The carbon brushes can then be easily
removed.
brush
38
0.24” (6mm)
Fig. 6
ACCESSORIES
5. Service and repairs
All quality power tools will eventually require
servicing or replacement of parts because of wear
from normal use. To assure that only authorized
replacement parts will be used, all service and
repairs must be performed by a HITACHI
AUTHORIZED SERVICE CENTER, ONLY.
6. Service parts list
CAUTION:
Repair, modification and inspection of Hitachi
Power Tools must be carried out by a Hitachi
Authorized Service Center.
This Parts List will be helpful if presented with the
tool to the Hitachi Authorized
Service Center when requesting repair or other
maintenance. In the operation and maintenance
of power tools, the safety regulations and
standards prescribed in each country must be
observed.
MODIFICATIONS:
Hitachi Power Tools are constantly being improved and
modified to incorporate the latest technological
advancements.
Accordingly, some parts may be changed without prior
notice.
WARNING:
Never use any accessories other than those mentioned below.
The use of any accessories other than those mentioned below or attachments not intended for use such as
cup wheel, cut-off wheel or saw blade is dangerous and may cause personal injury or property damage.
NOTE:
Accessories are subject to change without any obligation on the part of the HITACHI.
STANDARD ACCESSORIES
Wrench (Code No. 937913Z) ................................ 1
䡬
䡬
Hexagonal bar wrench (Code No. 872422) ......... 1
䡬
Side Handle (Code No. 322411) ........................... 1
OPTIONAL ACCESSORIES...sold separately
Depressed center wheel (10pcs. per package)
䡬
7" (180 mm) external dia.
thickness × 7/8" (22 mm) hole dia.
(Code No. 701070)
9" (230 mm) external dia.
thickness × 7/8" (22 mm) hole dia.
(Code No. 701090)
NOTE:
Specifications are subject to change without any
obligation on the part of the HITACHI.
14
×
1/4" (6 mm)
×
1/4" (6 mm)
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