HiKOKI G 10VE Disc Grinder Instruction Manual

: June 4, 2024
: HiKOKI

Table of Contents

GENERAL POWER TOOL SAFETY WARNINGS
SYMBOLS
SPECIFICATIONS
**STANDARD ACCESSORIES
APPLICATIONS
PRIOR TO OPERATION
PRACTICAL GRINDER APPLICATION
**ASSEMBLING AND DISASSEMBLING THE DEPRESSED CENTER WHEEL (Fig. 6)
MAINTENANCE AND INSPECTION
SELECTING ACCESSORIES
Documents / Resources
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)

Disc Grinder
G 10VE
Keep for future reference
Handling instructions

GENERAL POWER TOOL SAFETY WARNINGS

WARNING
Read all safety warnings and all instructions.
Failure to follow the warnings and instructions may result in electric shock, ﬁre, and/or serious injury.
Save all warnings and instructions for future reference.
The term “power tool” in the warnings refers to your mains-operated (corded) power tool or battery-operated (cordless) power tool.
1) Work area safety
a) Keep the 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 ﬂ flammable liquids, gases, or dust.
Power tools create sparks that may ignite dust or 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 the 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.
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 the 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.
The 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.
The 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.
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 masks, non-skid safety shoes, hard hats, 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 the power source and/or battery pack, picking up or carrying the tool.
Carrying power tools with your ﬁnger on the switch or energizing power tools that have the switch on invites accidents.
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 jewelry. Keep your hair, clothing, and gloves away from moving parts.
Loose clothes, jewelry, 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.
The 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 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 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 ARE 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 speciﬁ cations provided with this power tool.
Failure to follow all instructions listed below may result in electric shock, ﬁ re, and/or serious injury.
b) Operations such as sanding, wire brushing, and 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 that 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 ﬂ y 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) Threaded mounting of accessories must match the grinder spindle thread. For accessories mounted by ﬂanges, the arbor hole of the accessory must ﬁ t the locating diameter of the ﬂange.
Accessories that do not match the mounting hardware of the power tool will run out of balance, vibrate excessively, and may cause a loss of control.
g) Do not use a damaged accessory. Before each use inspects the accessory such as abrasive wheels for chips and cracks, a backing pad for cracks, tears, or excess wear, and a wire brush for loose or cracked wires. If a 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 the application, use a face shield, safety goggles, or safety glasses. As appropriate, wear a 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 ﬁ filtrating particles generated by your operation. Prolonged exposure to high- intensity noise may cause hearing loss.
i) Keep bystanders at a safe distance away from the work area. Anyone entering the work area must wear personal protective equipment.
Fragments of workpieces or of a broken accessory may ﬂ y away and cause injury beyond the immediate area of operation.
j) Hold the 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 could give the operator an electric shock.
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 dust inside the housing and excessive accumulation of powdered metal may cause electrical hazards.
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 the 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 ﬁ rm grip on the power tool and position your body and arm to allow you to resist kickback forces. Always use an 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.
The accessory may kick back over your hand.
c) Do not position your body in the area where the power tool will move if kickback occurs.
Kickback will propel the tool in the 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 kickbacks 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.
b) The grinding surface of center depressed wheels must be mounted below the plane of the guard lip.
An improperly mounted wheel that projects through the plane of the guard lip cannot be adequately protected.
c) The guard must be securely attached to the power tool and positioned for maximum safety, so the least amount of wheel is exposed to the operator.
The guard helps to protect the operator from broken wheel fragments, accidental contact with the wheel, and sparks that could ignite clothing.
d) Wheels must be used only for recommended applications. For example: do not grind with the side of the cut-oﬀ wheel.
Abrasive cut-oﬀ wheels are intended for peripheral grinding, side forces applied to these wheels may cause them to shatter.
e) Always use undamaged wheel ﬂanges that are of the 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.
f) Do not use worn-down wheels from larger power tools.
The wheel intended for a 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 binding 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 the 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 re-enter the cut.
The wheel may bind, walk up, or kick back 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 of the workpiece on both sides of the
wheel.
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.

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 the 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 seconds 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;
When using an abrasive cutting wheel, be sure to remove the standard accessory wheel guard and attach the wheel guard with the side guard (sold separately) (Fig. 5);
Do not use separate reducing bushings or adapters to adapt large hole abrasive wheels;
For tools intended to be fitted with a threaded hole wheel, ensure that the thread in the wheel is long enough to accept the spindle length;
Check that the workpiece 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 a dust mask, gloves, helmet, and apron should be worn;
Pay attention to the wheel that continues to rotate after the tool is switched off.

ADDITIONAL SAFETY WARNINGS

Ensure that the power source to be utilized conforms to the power requirements speciﬁ ed on the product nameplate.
Ensure that the power switch is in the OFF position. If the plug is connected to a receptacle while the power switch is in the ON position, the power tool will start operating immediately, which could cause a serious accident.
When the work area is removed from the power source, use an extension cord of suﬃcient thickness and rated capacity. The extension cord should be kept as short as practicable.
Ensure that the depressed center wheel to be utilized is the correct type and free of cracks or surface defects. Also, ensure that the depressed center wheel is properly mounted and the wheel nut is securely tightened.
Conﬁ rm that the push button is disengaged by pushing the push button two or three times before switching the power tool on.
To prolong the life of the machine and ensure a ﬁrst class ﬁnish, it is important that the machine should not be overloaded by applying too much pressure. In most applications, the weight of the machine alone is suﬃcient for eﬀective grinding.
Too much pressure will result in reduced rotational speed, inferior surface ﬁnish, and overloading which could reduce the life of the machine.
The wheel continues to rotate after the tool is switched oﬀ .
After switching oﬀ the machine, do not put it down until the depressed center wheel has come to a complete stop. Apart from avoiding serious accidents, this precaution will reduce the amount of dust and swarf sucked into the machine.
When the machine is not used, the power source should be disconnected.
Be sure to switch OFF and disconnect the attachment plug from the receptacle to avoid a serious accident before the depressed center wheel is assembled and disassembled.
When using the tool at any value except the full speed (Dial scale 6), the motor cannot be suﬃciently cooled due to the decreased number of revolutions. This could result in the risk of burning and damaging the motor before an overload protective mechanism starts to function.
Make sure that you use the tool by lightly applying it to the surface of the material when you use it at any value except the full speed (Dial scale 6).
Caution when using near welding equipment
When using the grinder in the immediate vicinity of welding equipment, the rotational speed may become unstable. Do not use the grinder near welding equipment.
RCD
The use of a residual current device with a rated residual current of 30 mA or less at all times is recommended.

SYMBOLS

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

****	G10VE: Disc Grinder
****	To reduce the risk of injury, users must read the instruction manual.
****	Always wear eye protection.

| Class II tool

SPECIFICATIONS

Model	G10VE
Voltage	220 V
Power Input	1200 W
Rated speed	2800 – 10000 /min
Wheel	Outer dia. × thickness × hole dia.
Peripheral speed	72 m/s
Weight (Only main body)	1.6 kg

**STANDARD ACCESSORIES

**

See the list below to check the accessories for G10VE.

| G10VE
---|---
Wrench| 1
Depressed center wheel | 1

APPLICATIONS

Removal of casting ﬁ n and ﬁnishing of various types of steel, bronze, and aluminum materials and castings.
Grinding of welded sections or sections cut by means of a cutting torch.
Grinding of synthetic resins, slate, brick, marble, etc.
Cutting of synthetic concrete, stone, brick, marble, and similar materials.

PRIOR TO OPERATION

Power source
Ensure that the power source to be utilized conforms to the power requirements speciﬁ ed on the product nameplate.
Power switch
Ensure that the power switch is in the OFF position. If the plug is connected to a receptacle while the power switch is in the ON position, the power tool will start operating immediately, which could cause a serious accident.
Extension cord
When the work area is removed from the power source, use an extension cord of suﬃcient thickness and rated capacity. The extension cord should be kept as short as practicable.
Mounting the wheel guard (Fig. 1)
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 Wheel Guard] ○ Slightly loosen the screw on the wheel guard.
○ Install the wheel guard to the packing gland, turn it to the angle suitable for operation, and make adjustments.
○ After the adjustment, ensure that the screw is securely tightened on the wheel guard in order to ﬁxit completely.
Ensure that mounted wheels and points are ﬁtted in accordance with the manufacturer’s instructions. Ensure that the depressed center wheel to be utilized is the correct type and free of cracks or surface defects. Also ensure that the depressed center wheel is properly mounted and the wheel nut is securely tightened, Refer to the section on “ASSEMBLING AND DISASSEMBLING THE DEPRESSED CENTER WHEEL”. Ensure that blotters are used when they are provided with the bonded abrasive product and when they are required.
Do not use separate reducing bushings or adaptors to adapt large-hole abrasive wheels. For tools intended to be ﬁtted with a threaded hole wheel, ensure that the thread in the wheel is long enough to accept the spindle length. Do not use the cutting oﬀ wheel for side grinding.
Conducting a trial run
Ensure that the abrasive products are correctly mounted and tightened before use and run the tool at no-load for 30 seconds 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.
Conﬁ rm the push button
Conﬁ rm that the push button is disengaged by pushing the push button two or three times before switching the power tool on (See Fig. 3).
Fixing the side handle (sold separately)
Screw the side handle into the gear cover (Fig. 2).

PRACTICAL GRINDER APPLICATION

Switch operation
When you start the tool, ﬁrstly push the rear part of the slide knob, then push the slide knob forward.
When you need to keep the switch in the ON position, push the head of the knob to latch in the ON position.
When releasing the switch to the OFF position, push the rear part of the slide knob.
Pressure
To prolong the life of the machine and ensure a ﬁrst class ﬁnish, it is important that the machine should not be overloaded by applying too much pressure. In most applications, the weight of the machine alone is suﬃcient for eﬀective grinding. Too much pressure will result in reduced rotational speed, inferior surface ﬁnish, and overloading which could reduce the life of the machine.
Grinding angle
Do not apply the entire surface of the depressed center wheel to the material to be ground. As shown in Fig. 4, the machine should be held at an angle of 15° – 30° so that the external edge of the depressed center wheel contacts the material at an optimum angle.
To prevent a new depressed center wheel from digging into the workpiece, initial grinding should be performed by drawing the grinder across the workpiece toward the operator (Fig. 4 direction B). Once the leading edge of the depressed center wheel is properly abraded, grinding may be conducted in either direction.
Precautions immediately after ﬁnishing operation
The wheel continues to rotate after the tool is switched oﬀ.
After switching oﬀ the machine, do not put it down until the depressed center wheel has come to a complete stop. Apart from avoiding serious accidents, this precaution will reduce the amount of dust and swarf sucked into the machine.
This model is equipped with an electronic inﬁ nite-variable-speed drive and can change the number of revolutions according to use.
If you turn and set the dial scale (Fig. 5) to 6, the number of revolutions increases, and if you turn and set it to 1, the number of revolutions decreases. Before use, set the number of revolutions using the dial. In so doing, refer to the following table as a rough guide.Dial| Use| Tools
---|---|---
1| Polishing, finishing| Radial grinding disc Sanding disc
2| Removal of paint or coat Removal of rust
Removal of burrs
3
4
5| Grinding| Depressed center wheel
6| Rough grinding Cutting| Depressed center wheel Diamond wheel

NOTE
Use caution not to turn the dial scale to any value below 1 or above 6.

CAUTION

Check that the workpiece is properly supported.
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.
Ensure that sparks resulting from use do not create a hazard e.g. do not hit persons, or ignite ﬂammable substances.
Always use eye and ear protection.
Other personal protective equipment such as a dust mask, gloves, helmet, and apron should be worn when necessary.
If in doubt, wear protective equipment.
When the machine is not used, the power source should be disconnected.

**ASSEMBLING AND DISASSEMBLING THE DEPRESSED CENTER WHEEL (Fig. 6)

**

CAUTION
Be sure to switch OFF and disconnect the attachment plug from the receptacle to avoid a serious accident.

Assembling (Fig. 6)
Turn the disc grinder upside down so that the spindle is facing upward.
Align the across ﬂ ats of the wheel washer with the notched part of the spindle, then attach them.
Fit the protuberance of the depressed center wheel onto the wheel washer.
Screw the wheel nut onto the spindle.
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. 6.
Disassembling
Follow the above procedures in reverse.

CAUTION

Conﬁ rm that the depressed center wheel is mounted ﬁrmly.
Conﬁ rm that the push button is disengaged by pushing the push button two or three times before switching the power tool on.

ASSEMBLING AND DISASSEMBLING THE CUTTING WHEEL (Fig. 7)
CAUTION
Be sure to switch OFF and disconnect the attachment plug from the receptacle to avoid a serious accident.

Assembling (Fig. 7)
Turn the disc grinder upside down so that the spindle is facing upward.
On the spindle, place the Ø20 wheel washer towards the spindle and then attach the cutting wheel.
From the top of the cutting wheel, place the depressing side of the wheel nut towards the cutting wheel and attach it to the spindle.
Screw the wheel nut onto the spindle.
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. 7.
Disassembling
Follow the above procedures in reverse.

CAUTION

Conﬁ rm that the cutting wheel is mounted ﬁrmly.
Conﬁ rm that the push button is disengaged by pushing the push button two or three times before switching the power tool on.

NOTE

To avoid malfunction of the motor, keep the cutting depth to under 5 mm at a time.
Avoid using excessive force by modifying the feed rate when operating the tool.
The wheel guard for the cutting wheel will heat up to high temperatures from grind sparks.
Do not touch the wheel guard during operation.

ASSEMBLING AND DISASSEMBLING THE DIAMOND WHEEL (Fig. 8)
CAUTION
Be sure to switch OFF and disconnect the attachment plug from the receptacle to avoid a serious accident.

Assembling (Fig. 8)
Turn the disc grinder upside down so that the spindle is facing upward.
On the spindle, place the Ø16 wheel washer towards the spindle and then attach the diamond cutter.
From the top of the diamond cutter, place the depressing side of the wheel nut towards the diamond cutter and attach it to the spindle.
Screw the wheel nut onto the spindle.
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. 8.
Use a dry-type diamond cutter.
Disassembling
Follow the above procedures in reverse.

CAUTION

Conﬁ rm that the diamond wheel is mounted ﬁrmly.
Conﬁ rm that the push button is disengaged by pushing the push button two or three times before switching the power tool on.

NOTE

To avoid malfunction of the motor, keep the cutting depth to under 5 mm at a time.
Avoid using excessive force by modifying the feed rate when operating the tool.
Use the same wheel washer and wheel nut included for grinding wheel installation.
However, both are used facing the opposite direction of that when installing the grinding wheel.

MAINTENANCE AND INSPECTION

Inspecting the depressed center wheel
Ensure that the depressed center wheel is free of cracks and surface defects.
Inspecting the mounting screws
Regularly inspect all mounting screws and ensure that they are properly tightened. Should any of the screws be loose, retighten them immediately. Failure to do so could result in serious hazards.
Inspecting the carbon brushes
For your continued safety and electrical shock protection, carbon brush inspection and replacement on this tool should ONLY be performed by a HiKOKI Authorized Service Center.
Maintenance of the motor
The motor unit winding is the very “heart” of the power tool. Exercise due care to ensure the winding does not become damaged and/or wet with oil or water.
Replacing supply cord
If the replacement of the supply cord is necessary, this has to be done by HiKOKI Authorized Service Center in order to avoid a safety hazard.
If the supply cord of this power tool is damaged, it must be replaced by a specially prepared cord available through the service organization.