YT-82824 - Grinder Yato - Free user manual and instructions

USER MANUAL YT-82824 Yato

Exterior view of a YATO precision tool (no text or symbols on body)

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Labeled diagram of a mechanical tool with numbered parts, including a wrench and a separate wrench assembly.

Close-up of gloved hands using a mechanical tool to handle a small metallic component (no text or symbols visible)

Two-panel black-and-white photo showing a hand pressing down on a device component, no visible text or symbols

Close-up of a hand pressing down on a white handheld device with a rotary dial (no visible text or symbols)

Close-up of hands using a power tool, no visible text or symbols

1. body
2. electric power switch
3. speed control
4. fi xing nut
5. tool chuck
6. battery socket
7. wrench

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Read the operating instruction

Wear protective goggles

Wear hearing protectors

This symbol indicates that waste electrical and electronic equipment (including batteries and storage cells) cannot be disposed of with other types of waste. Waste equipment should be collected and handed over separately to a collection point for recycling and recovery, in order to reduce the amount of waste and the use of natural resources. Uncontrolled release of hazardous components contained in electrical and electronic equipment may pose a risk to human health and have adverse effects for the environment. The household plays an important role in contributing to reuse and recovery, including recycling of waste equipment. For more information about the appropriate recycling methods, contact your local authority or retailer.

WYPOSAŻENIE PRODUKTU

The straight grinder is a type of grinder which allows the material to be machined with grinder pins, wire brushes, and polishing wheels. Due to the small size of the accessories, it is particularly suitable for work in places that cannot be reached with other types of grinders. The correct, reliable, and safe operation of the appliance depends on its proper use, therefore:

Read this entire instructions manual before the first use of the tool and keep it for future reference.

Caution! Produced during the sanding of certain surfaces, the resulting dust can be harmful to health or toxic.

The above remark applies, among others, to the sanding of surfaces covered with paints containing lead, certain types of wood, certain metals (e.g. lead) and materials, therefore, effective dust extraction, dust masks and other skin and respiratory protection measures should be used during work. The supplier shall not be liable for any damage resulting from failure to comply with the safety instructions and recommendations specified in this instructions manual.

PRODUCT ACCESSORIES

The product is supplied complete and does not require assembly. The supply battery and battery charger are not included.

TECHNICAL DATA

Parameter Unit Value
Catalogue No. YT-82824
Rated voltage [V] 18 DC
Tool chuck diameter [mm] 6
Max.diameter of accessories [mm] 25
Thread size of the fi xing nut M15
Rated rpm [min]	^-1 ]	8,000 – 26000
Noise level
- sound pressure	[dB(A)]	78.0 ± 3.0
- power	[dB(A)]	89.0 ± 3.0
Vibration level	[m/s ^2 ]	2.47 ± 1.5
Protection rating		IPX0
Weight	[kg]	1.37
Battery type		Li-Ion

The declared noise emission value has been measured using the standard test method and can be used to compare one tool to another. The declared noise emission value can be used in the preliminary exposure assessment.

The declared total vibration value has been measured using the standard test method and can be used to compare one tool to another. The declared total vibration value can be used in the initial exposure assessment.

Caution! The vibration emission during tool operation may differ from the declared value, depending on the manner the tool is used. Caution! Safety measures to protect the operator, which are based on an assessment of exposure under actual conditions of use (including all parts of the work cycle, such as the time when the tool is switched off or idle and the activation time), must be specified.

GENERAL SAFETY CONDITIONS

NOTE! Get acquainted with all the instructions below. Failure to observe them may lead to an electric shock, fire or injuries. The notion of electric tool used in the instructions applies to all the tools which are powered with electric current, both wire tools and wireless ones.

OBSERVE THE FOLLOWING INSTRUCTIONS

Place of work

The place of work must be properly illuminated and clean. Disorder and poor illumination may be a cause of accidents. Do not work with electric tools in explosive environments, or those which contain inflammable liquids, gases or vapours. Electric tools generate sparks, which may cause a fire in case of contact with inflammable gases or vapours. Do not allow children and outsiders to the place of work. A lack of concentration may result in a loss of control over the tool.

Electric safety

The plug of the power supply cable must fit the mains socket. Do not modify the plug. Do not use any adapters whatsoever in order to adapt the plug to the socket. Unmodified plug which fits the socket reduces the risk of an electric shock. Avoid

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contact with grounded surfaces, such as pipes, heaters and refrigerators. Grounding of the body increases the risk of an electric shock. Do not expose electric tools to precipitation or humidity. Water and humidity which gets into the electric tool increases the risk of an electric shock. Do not overload the power supply cable. Do not use the power supply cable in order to carry the tool or to connect and disconnect the plug from the mains socket. Avoid contact of the power supply cable with heat, oils, sharp tools and moving elements. Damage to the power supply cable increases the risk of an electric shock. In case work is realised outside closed areas, it is necessary to use extension cords designed for applications outside closed areas. Using a correct extension cord permits to reduce the risk of an electric shock.

Personal safety

Commence work in good physical and psychological conditions. Pay attention to what you do. Do not work if you are tired or under effects of medicines or alcohol. Even a moment's inattention during work may lead to serious injuries. Always use individual means of protection. Always wear goggles. Using individual means of protection, such as dust-masks, protective shoes, helmets and hearing protections permits to reduce the risk of serious injuries. Avoid accidental activation of the tool. Make sure the switch is in the OFF position, before you connect the tool to the mains. Holding the tool with a finger on the switch or connecting an electric tool when the switch is in the ON position may lead to serious injuries. Before you turn an electric tool on remove all the spanners and other tools, which have been used for adjustments. A spanner left on rotating elements of the tool may lead to serious injuries. Keep your balance. Maintain an appropriate position. It will permit to control the electric tool in case of unpredicted situations during its operation. Use protective clothes. Do not wear loose clothes or jewellery. Keep your hair, clothes and gloves away from moving elements of the electric tool. Loose clothes, jewellery or long hair may get caught on moving elements of the tool. Use dust extractors or dust containers, if the tool is equipped with any. Make sure they are properly connected. Using of dust extractors permits to reduce the risk of serious injuries.

Caution when using a power tool.

Before inserting a battery pack make sure that the switch stays in "OFF" position. Inserting a battery pack into a power tool, when the switch is in "ON" position may cause accidents.

Use only chargers recommended by the manufacturer. Using a charger designed for only one type of battery pack, to charge other types of battery pack may be a cause of fire.

Use power tools only with battery pack specified by the manufacturer. Use of other battery pack may be a cause of injuries or fire. When the battery pack is not used, it should be stored away from metal objects, such as paper clips, coins, nails, bolts or other small metal elements, that may short the terminals. Shorting terminals of a battery may cause burns or fire.

In adverse conditions, a liquid may escape from a battery; avoid any contact with this liquid. In case of accidental contact with a liquid, rinse with water. If a liquid gets into your eyes, please seek medical advice. A liquid escaping from a battery may cause irritations or burns.

Repairs

Have the tool repaired solely by authorised workshops, where original spare parts are used. This will ensure the adequate safety of operation of the electric tool.

ADDITIONAL SAFETY INSTRUCTIONS

The tool is designed only for grinding, polishing, work with wire brush, carving and cutting. Read all the warnings, instructions, illustrations and specifications supplied along with this power tool. Failure to observe all instructions presented below may lead to electric shock, fire and/or serious injuries.

Do not use any accessories that have not been designed and are not recommended by the manufacturer. The fact that any accessory may be installed does not mean that it guarantees safe operation.

Maximum rotational speed of accessories must be higher or equal to maximum rotational speed of the tool. Accessories of smaller rotational speed than the speed of the tool may disintegrate during operation.

Outer diameter and thickness of accessories must stay within the range defined for the tool.

Accessories of wrong dimensions may not be properly controlled.

Size of mounting hole of wheels, discs, flanges and other accessories must fit the size of tool's spindle. Accessories with mounting hole not filling the size of tool's spindle will start vibrating after the start and this may result in loss of control of the tool.

Shafts of: discs, polishing wheels, cutting discs must be inserted in full into hand grip or tool chuck. If the shaft is not sufficiently held down and/or it protrudes too far, the tool inserted may be loosened and ejected at a high speed.

Do not use damaged accessories. Before each use check the condition of such accessories as abrasive wheels for the presence of cracks and abrasion, polishing wheels for the presence of cracks, abrasion and excessive use, wire brushes for the presence of loosened or cracked wires. In case of dropping of accessories they must be examined for damages or new, undamaged accessories should be installed. Once the accessories are examined and installed, you and other third parties should stay out of the plane of rotation of accessories, and then start the tool for one minute at the maximum rotational speed. Damaged accessories shall be destroyed during the test.

Use personal safety equipment. Depending on application, use protection of faces, goggles or safety glasses. If it is required, use anti-dust masks, hearing protections, gloves or aprons protecting from small parts of accessories or

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materials produced during operation of the tool. Eye protection must be able to stop flying chips produced during operation of the tool. Anti-dust mask must be able to filtrate the dust produced during operation of the tool. Too long exposure to noise may result in loss of hearing.

Maintain safe distance between the workplace and outsiders. Persons accessing the workplace must use personal safety equipment. Chips produced during the work or chips of damaged accessories may fly out of immediate vicinity of the workplace.

While working, where the inserted tool may come into contact with hidden live wire, hold the power tool using insulated handles. Inserted accessory when coming into contact with a live wire may cause metal components of the tool to become energized, which could result in electric shock to the tool operator.

Firmly hold the tool in your hand (hands) during the start. The torque of the engine accelerating to full speed can cause the rotation of the tool.

When possible, use the clamps to hold down the workpiece. Never hold the small workpiece in one hand and the tool in the other hand during the work. Using clamps for fastening small workpiece will allow controlling the tool with your hands.

Round materials such as spindles and pipes tend to rotate during cutting and may cause a jam or sudden movement towards the operator.

Place the power cable out of rotating tool components. In case the control of tool is lost, the cable may be cut or seized, and the operator's hand or arm may be drawn into rotating tool's components.

Never put aside the tool until all rotating elements are stopped completely. Rotating elements may “seize” the substrate and get the tool out of control.

After the replacement of inserted accessory or any adjustment, always make sure that the nut of the spindle, tool chuck or any adjustment tool has been firmly tightened. Loosened adjustment tool may unexpectedly displace and cause the loss of control, loosened and rotating elements will be ejected at high speed.

Do not start the tool while carrying it. Accidental contact with rotating elements may cause the clothes being seized and drawn in and contact of tool with operator's body.

It is required to clean the ventilation slots of the tool on regular basis. Motor's fan sucks up the dirt and dust produced during operation of the tool to the interior of the tool. Excessive accumulation of metals particles contained in dust increases the threat of electric shock.

Do not operate the tool close to flammable materials. Sparks produced during the work may cause a fire.

Do not use accessories that require cooling liquid. Water or cooling liquid may cause electric shock.

Warning associated with a risk of rebound of tool in direction of operator.

Rebound of tool in direction of an operator is a result of sudden reaction to locked or clamped: rotating disc, polishing belt, brush or other accessories. Locking or clamping causes sudden stoppage of the rotating accessory which results in rotation of power tool in a direction opposite to rotation of an accessory.

For example, if the abrasive wheel is locked or clamped by the workpiece, the edge of wheel entering the point of clamping may penetrate the surface of material, causing the wheel getting out or being ejected. The wheel may also get out in direction of an operator or in opposite direction, depending on direction of motion of abrasive wheel at clamping point. Abrasive wheels may also crack under such conditions.

Rebound of tool in direction of an operator is a result of improper use and/or failure to comply with instructions contained in this manual. This phenomenon may be avoided by adhering to recommendations.

Apply the secure grip of the tool and proper posture of the body and hands, this will allow counteracting the rebound forces. An operator is able to control the rotation or rebound of tool if proper precautions are taken.

Special precautions should be taken during the work close to corners, sharp edges etc. Avoid bumping and binding of grinding wheel. When processing corners or edges, there is an increased risk of binding of grinding wheel which leads to loss of control of tool or rebound of tool.

Do not use circular saws with teeth. Blades cause repeated rebounds and loss of control of tool.

Always insert the tool into the material in the same direction in which the edge of cutting exits the material (direction of ejection of chips). Inserting the tool in wrong direction will make the cutting edge of the tool inserted exits the material and pulls the tool in this direction.

When using rotating files, cutting wheels, high-speed cutters made of self-bonded carbide, always fasten the workpiece safely. These accessories may be seized if they are slightly tilted in saw cut and cause the rebound. If a cutting wheel is seized, it usually breaks. If a rotating file or cutter made of self-bonded carbide is seized, it may get out of the saw cut and cause loss of control of tool.

Warnings related to grinding and cutting by means of abrasive wheels

Use only discs designed to work with the tool and guards designed for the particular type of job. For example, do not grind using the edge of cutting wheels. Abrasive wheels for cutting are designed for peripheral load; lateral forces applied to such wheel can make it fall to pieces.

In case of threaded abrasive cones and studs, use only undamaged shafts of plates with flat flange of the right size and

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length. The use of correct shaft will reduce the risk of cracking.

Do not "jam" the cutting wheels or apply too much pressure to them. Do not try to increase the cutting depth. Excessive pressure on wheel increases the load, torsion and abrasion resistance during cutting, and the likelihood of a rebound or damage to wheel.

Do not place your hands in the line and behind the spinning wheel. If in the course of work the disc moves away from your hands, then in the case of rebound the rotating wheel and tool will be directed towards the operator.

If the wheel has been seized, locked, or in the event of discontinued cutting for any reason, turn off the tool and hold it idle until the wheel stops completely. Never attempt to release a cutting wheel from a saw cut if the wheel is in motion, otherwise it may cause a rebound. Investigate the causes and take the correct steps to eliminate the cause of locking the wheel.

Do not resume cutting in the workpiece. Let the wheel reach full rotational speed, and then carefully resume cutting. The wheel may be locked, get out of the material or bounce if the power tool is started while in the workpiece.

In order to avoid wheel clamping or bouncing, you have to support panels and other oversized materials. Large-size materials tend to bend under their own weight. Supports must be placed under the workpiece near the line of cutting and near the edge of the material on both sides of the cutting line.

Special caution must be taken when cutting cavities in walls or other surfaces. The wheel can cut gas and water pipes or electric cables, as well as objects that will cause a rebound.

Warnings related to work with wire brush

Caution must be taken, because the wire splinters are ejected out of the brush also during normal operation. Do not overload the wires by applying excessive force to the brush. Wires can easily puncture light clothing and/or skin.

Before the use, for at least one minute let brushes reach the operating speed. Then, no one can stand in front of or in line of the brush. Loose splinters of wires or wires will be thrown out of the brush during this operation.

Direct the material from the spinning brush away from you. While working, small splinters and small pieces of wire can be thrown out at high speed and stick into the skin.

INSTALLATION OF ACCESSORIES

CAUTION! All operations mentioned in this chapter must be carried out with the power supply disconnected – the battery must be disconnected from the tool!

Installation of tooling in the tool chuck (II)

It may be necessary to loosen the fixing nut before inserting a tool into the chuck. To do this, hold the spindle with one spanner and unscrew the nut with the other. The nut should not be completely taken off the chuck.

Place the shank of the tool in the chuck. There must be a gap of no more than 8 mm between the working part of the tool and the chuck. Moreover, make sure that at least half of the tool shank is inside the chuck.

Remove the tooling by by loosening the fi xing nut.

Warning! The tooling might be hot immediately after finishing work. Allow it to cool down itself before removing.

TOOL OPERATION

Rechargeable battery

Only one of the following YATO Li-Ion 18 V batteries can be used to power the tool: YT-82842, YT-82843, YT-82844, YT-82845, which can only be charged with YATO YT-82848 or YT-82849 chargers. It is forbidden to use other batteries with a different rated voltage and not matching the device battery socket. It is forbidden to modify the socket or battery to make them match.

Slide the battery into the socket with the contacts facing inside the tool until the battery latch engages. Make sure that the battery will not slide out on its own during operation. Disconnect the battery by pressing and holding the latch and then pulling the battery out of the tool housing.

Starting and stopping the grinder

Before starting the grinder, hold it with both hands on the handles or isolated housing elements and make sure that the tool does not come into contact with any objects. The direction of rotation of the spindle is indicated by an arrow on the tool housing near the tool chuck.

Start the tool by pressing and holding the back of the on/off button and then sliding it forward (III). The on/off switch can be locked in the front position which can be helpful during prolonged work.

When the tool is started up, hold it in this position for about 30 seconds, watching for any suspicious noises, excessive noise or excessive vibration.

If no signs of malfunction are found, the tool should be switched off by releasing pressure on the switch or, if it was locked, by pressing the back of the switch button. The button retracts automatically, but the tool can still move for some time after the switch is released.

The tool can be put away only after the inserted tool has come to a complete standstill.

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Speed control (IV)

Speed control is only possible when the supply battery is connected.

Press the button and the lights next to the gear number are illuminated one after another. The higher the number of gears, the higher the speed. Once the highest speed is reached, the next press of the button will shift to the lowest speed gear. Lower gears have lights illuminated in green and higher gears have lights illuminated in red.

USING THE GRINDER

Basic precautions must be taken when using grinding stones. Before each use, the grinding stones should be visually inspected for damage and deformation. It is forbidden to use grinding stones in which any damage has been found. Grinding stones should not be thrown, struck or violently applied to the workpiece. This can cause the grinding stone to disintegrate, resulting in serious injury.

The shank of the tooling must not protrude more than 8 mm from the chuck.

Use accessories according to their intended use. For example, do not grind with discs designed for cutting, do not use drill bits for side milling.

Before fitting the tooling, set the correct operating speed for the type of equipment. After installation, allow the too to reach its full working speed. Apply only full-speed rotating accessories to the workpiece. Do not apply excessive force, but only as much force as is needed for proper operation. Apply sanding discs at a slight angle to the workpiece. Place the cutting discs perpendicular to the intended cut. Brushes should be applied in such a way that the ends of the wires, not their lateral surfaces, abrade the workpiece.

When finished working, move the accessory safely away from the workpiece, then switch off the power tool and wait for the inserted tool to come to a complete stop. Disconnect the battery from the power tool and proceed with disassembly or adjustment.

The workpiece must be clamped or supported in such a way as to prevent uncontrolled movement of the material and its parts while being worked on. This can be done using supports, brackets, clamps, vices, etc. Clamping should be done in such a way as to ensure free access to the work surface.

Always hold the tool with both hands by the insulated handles (V). This will make the work safer and allow easier control of the tool, also during unexpected situations.

Hold the tool with sufficient force to work safely. An overly firm grip can cause fatigue. Avoid holding the tool with your fingers alone.

When using tools screwed onto a threaded shank, they should be selected so that the fixing thread is no longer than the hole into which it will be screwed. This will prevent the accessories from breaking. Stems with flat flanges and without undercuts or recesses should be used. This will increase the contact area between the stem and the accessory and prevent breakage.

Accessories with a diameter larger than that specified in this manual must not be used.

Get to work. In continuous operation, the heat build-up of the grinder and tool should be monitored and breaks should be taken during operation as the temperature rises. To prevent the motor from overheating, it is advisable to take frequent breaks from the grinder and keep the ventilation slots clear.

When working with the grinder, do not exert too much pressure on the workpiece and do not make sudden movements in order not to damage the tool fitted or the grinder itself.

When drilling or milling in steel or aluminium, tools can be cooled with emulsifying oil or coolant recommended for the specific material, while the use of coolant is not recommended when working in brass. In the final phase of drilling through holes, the pressure on the drill bit should be reduced to avoid breaking or jamming. Once the drill is jammed, switch off the tool immediately. Exerting high pressures on the tools, or a wrong choice of speed for the type of work involved, will result in overloading of the tool, which can be recognised by significant heating of the outer surfaces of the tool body.

Do not overload the tool, the temperature of the external surface must never exceed 60°C.

After finishing work, switch off the tool, disconnect the battery and perform maintenance and inspection.

MAINTENANCE AND OVERHAUL

ATTENTION! Before any adjustment, technical service or maintenance operations unplug the tool. Once the operations have been finished, the technical conditions of the tool must be assessed by means of external evaluation and inspection of the following elements: body and handle, conductor with a plug and deflection, functioning of the electric switch, patency of ventilation slots, sparking of brushes, noise level of functioning of bearings and gears, start-up and smoothness of operation. During the guarantee period, the user cannot dismantle the electric tools or change any sub-assemblies or elements, since it will cancel any guarantee rights. All irregularities detected at overhaul or during functioning of the tools are a signal to have the tool repaired at a service shop. Once the functioning has been concluded, the casing, ventilation slots, switches, additional handle and protections must be cleansed with a stream of air (at a pressure not exceeding 0.3 MPa), with a brush or a cloth without any chemical substances or cleaning liquids. Tools and handles must be cleansed with a clean cloth.

GERÄTEBESCHREIBUNG

Batterie rechargeable

DODATNE SIGURNOSNE UPUTE

Alat je namijenjen samo za brušenje, poliranje, brušenje žičanom četkom, rezbarenje i rezanje. Pročitajte sva upozorenja, upute, ilustracije i specifikacije isporučene s električnim alatom. Nepoštivanje svih dolje navedenih uputa može dovesti do strujnog udara, požara i/ili ozbiljne ozljede.

Ne koristite pribor koji nije dizajnirao i preporučio proizvođač.Samo zato što se pribor može pričvrstiti na alat ne jamči siguran rad.

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DEKLARACJA ZGODNOŚCI DECLARATION OF CONFORMITY DECLARATIE DE CONFORMITATE

1125/YT-82824/EC/2025

We declare and guarantee with full responsibility that the following products:

meet requirements of the following European Standards / Technical Specifications:

and fulfill requirements of the following European Directives:

2006/42/EC Machinery and safety elements

2014/30/EU Electromagnetic compatibility (EMC) Directive

Directiva privind compatibilitatea electromagnetică (EMC) (H.G. nr. 487/2016)

2011/65/EU Restriction of the Use of Certain Hazardous Substances

Serial number: concern all serials numbers of item(s) mentioned in this declaration

The person authorized to compile the technical file: