GWS 12V76 Professional - Grinder BOSCH - Free user manual and instructions

USER MANUAL GWS 12V76 Professional BOSCH

(2) Bosch Power Tools 1 609 92A 559 | (19.07.2019)6 | English English Safety instructions General Power Tool Safety Warnings WARNING Read all safety warnings and all in- structions. 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 (cord- less) power tool. Work area safety u Keep work area clean and well lit. Cluttered or dark areas invite accidents. u 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 or fumes. u Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control. Electrical safety u 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. u Avoid body contact with earthed or grounded sur- faces, such as pipes, radiators, ranges and refrigerat- ors. There is an increased risk of electric shock if your body is earthed or grounded. u Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of elec- tric shock. u Do not abuse the cord. Never use the cord for carry- ing, 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. u When operating a power tool outdoors, use an exten- sion cord suitable for outdoor use. Use of a cord suit- able for outdoor use reduces the risk of electric shock.. u If operating a power tool in a damp location is un- avoidable, use a residual current device (RCD) protec- ted supply. Use of an RCD reduces the risk of electric shock. Personal safety u 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 inatten- tion while operating power tools may result in serious per- sonal injury. u Use personal protective equipment. Always wear eye protection. Protective equipment such as dust mask, non-skid safety shoes, hard hat, or hearing protection used for appropriate conditions will reduce personal in- juries. u 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 en- ergising power tools that have the switch on invites acci- dents. u 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 in- jury. u Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations. u Dress properly. Do not wear loose clothing or jew- ellery. Keep your hair, clothing and gloves away from moving parts. Loose clothes, jewellery or long hair can be caught in moving parts. u If devices are provided for the connection of dust ex- traction and collection facilities, ensure these are con- nected and properly used. Use of dust collection can re- duce dust-related hazards. Power tool use and care u 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 de- signed. u 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. u 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. u 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. u Maintain power tools. Check for misalignment or bind- ing 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. u Keep cutting tools sharp and clean. Properly main- tained cutting tools with sharp cutting edges are less likely to bind and are easier to control. u Use the power tool, accessories and tool bits etc. in accordance with these instructions, taking into ac- count the working conditions and the work to be per- 1 609 92A 559 | (19.07.2019) Bosch Power ToolsEnglish | 7 formed. Use of the power tool for operations different from those intended could result in a hazardous situation. Battery tool use and care u Recharge only with the charger specified by the manu- facturer. A charger that is suitable for one type of bat- tery pack may create a risk of fire when used with another battery pack. u Use power tools only with specifically designated bat- tery packs. Use of any other battery packs may create a risk of injury and fire. u When battery pack is not in use, keep it away from other metal objects, like paper clips, coins, keys, nails, screws or other small metal objects, that can make a connection from one terminal to another. Shorting the battery terminals together may cause burns or a fire. u Under abusive conditions, liquid may be ejected from the battery; avoid contact. If contact accidentally oc- curs, flush with water. If liquid contacts eyes, addi- tionally seek medical help. Liquid ejected from the bat- tery may cause irritation or burns. Service u 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 for Angle Grinder Safety Warnings common for Grinding or Abrasive Cutting Off operations u Do not use accessories which are not specifically de- signed and recommended by the tool manufacturer. Just because the accessory can be attached to your power tool, it does not assure safe operation. u 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. u The outside diameter and the thickness of your ac- cessory must be within the capacity rating of your power tool. Incorrectly sized accessories cannot be ad- equately guarded or controlled. u Threaded mounting of accessories must match the grinder spindle thread. For accessories mounted by flanges, the arbour hole of the accessory must fit 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 loss of control. u Do not use a damaged accessory. Before each use in- spect 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 in- stall an undamaged accessory. After inspecting and installing an accessory, position yourself and bystand- ers 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. u Wear personal protective equipment. Depending on application, use face shield, safety goggles or safety glasses. As appropriate, wear dust mask, hearing pro- tectors, gloves and workshop apron capable of stop- ping small abrasive or workpiece fragments. The eye protection must be capable of stopping flying debris gen- erated by various operations . The dust mask or respir- ator must be capable of filtrating particles generated by your operation. Prolonged exposure to high intensity noise may cause hearing loss. u 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. u 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 con- trol. u 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. u 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. u Do not operate the power tool near flammable materi- als. Sparks could ignite these materials. u This power tool is intended to function as a grinder or cut-off tool. Read all safety warnings, instructions, il- lustrations and specifications provided with this power tool. Failure to follow all instructions listed below may result in electric shock, fire and/or serious injury. u Operations such as sanding, wire brushing or polish- ing 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. u Do not use accessories that require liquid coolants. Using water or other liquid coolants may result in electro- cution or shock. u Hold the power tool by insulated gripping surfaces only, when performing an operation where the cutting accessory may contact hidden wiring. Cutting access- ory contacting a "live" wire may make exposed metal parts of the power tool "live" and could give the operator an electric shock. Kickback and Related Warnings Kickback is a sudden reaction to a pinched or snagged rotat- ing wheel, backing pad, brush or any other accessory. Pinch- ing or snagging causes rapid stalling of the rotating access- ory which in turn causes the uncontrolled power tool to be Bosch Power Tools 1 609 92A 559 | (19.07.2019)8 | English 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 direc- tion of the wheel’s movement at the point of pinching. Abras- ive 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. u 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 reac- tions or kickback forces, if proper precautions are taken. u Never place your hand near the rotating accessory. Accessory may kickback over your hand. u 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. u 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. u Do not attach a saw chain woodcarving blade or toothed saw blade. Such blades create frequent kick- back and loss of control. Safety Warnings specific for Grinding and Abrasive Cutting-Off operations u Use only wheel types that are recommended for your power tool and the specific guard designed for the se- lected wheel. Wheels for which the power tool was not designed cannot be adequately guarded and are unsafe. u The grinding surface of centre depressed wheels must be mounted below the plane of the guard lip. An im- properly mounted wheel that projects through the plane of the guard lip cannot be adequately protected. u 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. The guard helps to protect operator from broken wheel fragments, accidental contact with wheel and sparks that could ignite clothing. u Wheels must be used only for recommended applica- tions. For example: do not grind with the side of cut- off wheel. Abrasive cut-off wheels are intended for peri- pheral grinding, side forces applied to these wheels may cause them to shatter. u Always use undamaged wheel flanges that are of cor- rect size and shape for your selected wheel. Proper wheel flanges support the wheel thus reducing the pos- sibility of wheel breakage. Flanges for cut-off wheels may be different from grinding wheel flanges. u Do not use worn down wheels from larger power tools. Wheel intended for larger power tool is not suit- able for the higher speed of a smaller tool and may burst. Additional Safety Warnings specific for Abrasive Cutting Off operations u 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. u Do not position your body in line with and behind the rotating wheel. When the wheel, at the point of opera- tion, is moving away from your body, the possible kick- back may propel the spinning wheel and the power tool directly at you. u 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 com- plete 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 ac- tion to eliminate the cause of wheel binding. u Do not restart the cutting operation in the workpiece. Let the wheel reach full speed and carefully re-enter the cut. The wheel may bind, walk up or kickback if the power tool is restarted in the workpiece. u Support panels or any oversized workpiece to minim- ize 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. u Use extra caution when making a “pocket cut” into ex- isting walls or other blind areas. The protruding wheel may cut gas or water pipes, electrical wiring or objects that can cause kickback. Additional safety information Wear safety goggles. u Use suitable detectors to determine if there are hid- den supply lines or contact the local utility company for assistance. Contact with electric cables can cause fire and electric shock. Damaging gas lines can lead to ex- plosion. Breaking water pipes causes property damage. u Do not touch grinding and cutting discs until they have cooled down. The discs can become very hot while work- ing. u Release the On/Off switch and set it to the Off posi- tion when the power supply is interrupted, e.g. when the battery pack is removed. This prevents uncontrolled restarting. 1 609 92A 559 | (19.07.2019) Bosch Power ToolsEnglish | 9 u In case of damage and improper use of the battery, va- pours may be emitted. The battery can set alight or ex- plode. Ensure the area is well ventilated and seek medical attention should you experience any adverse effects. The vapours may irritate the respiratory system. u Do not open the battery. There is a risk of short-circuit- ing. u The battery can be damaged by pointed objects such as nails or screwdrivers or by force applied externally. An internal short circuit may occur, causing the battery to burn, smoke, explode or overheat. u Only use the battery with products from the manufac- turer. This is the only way in which you can protect the battery against dangerous overload. Protect the battery against heat, e.g. against continuous intense sunlight, fire, dirt, water and moisture. There is a risk of explosion and short-circuiting. u Do not touch grinding discs until they have cooled down. The discs can become very hot while working. u Secure the workpiece. A workpiece clamped with clamping devices or in a vice is held more secure than by hand. Product Description and Specifications Read all the safety and general instructions. Failure to observe the safety and general in- structions may result in electric shock, fire and/or serious injury. Please observe the illustrations at the beginning of this oper- ating manual. Intended use The power tool is intended for cutting and roughing of metal, stone and wood materials, plastics, non-ferrous metals and tiles without the use of water. A specific protective guard must be used when cutting. Product Features The numbering of the product features refers to the diagram of the power tool on the graphics page. (1) Direction of rotation arrow on housing (2) Spindle lock button (3) On/off switch (4) Battery

(5) Battery release button

(6) Battery charge indicator (7) Protective guard for grinding (8) Grinding spindle (9) Handle (insulated gripping surface) (10) Protective guard for cutting

(11) Clamping bolt with washer (12) Cutting disc

Accessories shown or described are not included with the product as standard. You can find the complete selection of accessories in our accessories range. Technical Data Grinder GWS 12V-76 Article number 3 601 JF2 0.. Rated voltage V= 12 Rated speed

19,500 Max. grinding disc diameter mm 76 Mounting diameter mm 10 Weight according to EPTA- Procedure 01:2014

kg 0.70–0.90 Recommended ambient temperature during char- ging °C 0 to +35 Permitted ambient temper- ature during operation

and during storage °C -20 to +50 Recommended batteries GBA 12V... Recommended chargers GAL 12... GAX 18... A) Depends on battery in use B) Limited performance at temperatures <0°C Noise/Vibration Information Noise emission values determined according to EN60745-2-3. Typically, the A-weighted sound pressure level of the power tool is 75dB(A). Uncertainty K=3dB. The noise level when working can exceed the volume stated. Wear hearing pro- tection! Vibration total values a

(triax vector sum) and uncertainty K determined according to EN60745-2-3: Surface grinding (roughing):

The vibration level given in these instructions has been measured in accordance with a standardised measuring pro- cedure and may be used to compare power tools. It can also be used for a preliminary estimation of exposure to vibra- tion. The stated vibration level applies to the main applications of the power tool. However, if the power tool is used for differ- ent applications, with different application tools or poorly maintained, the vibration level may differ. This can signific- antly increase the exposure to vibration over the total work- ing period. To estimate the exposure to vibration accurately, the times when the tool is switched off or when it is running but not ac- tually being used should also be taken into account. This can Bosch Power Tools 1 609 92A 559 | (19.07.2019)10 | English significantly reduce the exposure to vibration over the total working period. Implement additional safety measures to protect the oper- ator from the effects of vibration, such as servicing the power tool and application tools, keeping the hands warm, and organising workflows correctly. Fitting Battery Charging u Use only the chargers listed in the technical data. Only these chargers are matched to the lithium-ion battery of your power tool. Note: The battery is supplied partially charged. To ensure full battery capacity, fully charge the battery in the charger before using your power tool for the first time. The lithium-ion battery can be charged at any time without reducing its service life. Interrupting the charging process does not damage the battery. The lithium-ion battery is protected against deep discharge by the "Electronic Cell Protection (ECP)". When the battery is discharged, the power tool is switched off by means of a protective circuit: The application tool no longer rotates. u Do not continue to press the On/Off switch after the power tool has automatically switched off. The battery can be damaged. Follow the instructions on correct disposal. Removing the Battery (seefigureA) To remove the battery(4), press the release buttons(5) and pull the battery out of the power tool. Do not use force to do this. Battery charge indicator LED Capacity Continuous lighting 3x green 60–100% Continuous lighting 2x green 30–60% Continuous lighting 1x green 10–30% Slowly flashing light 1 x green 0–10% Fitting Protective Equipment u Remove the battery from the power tool before carry- ing out work on the power tool (e.g. maintenance, changing tool, etc.). The battery should also be re- moved for transport and storage. There is risk of injury from unintentionally pressing the on/off switch. Note: If the grinding disc breaks during operation or the holding fixtures on the protective guard/power tool become damaged, the power tool must be sent to the after-sales ser- vice immediately; see the "After-Sales Service and Applica- tion Service" section for addresses. Protective guard for cutting u Always use the protective guard for cutting (10) when cutting bonded abrasives. u Provide sufficient dust extraction when cutting stone. Fitting the Protective Guard (seefigureB) Insert the protective guard for cutting(10) onto the protect- ive guard for grinding(7) until this engages firmly. Adjusting the Protective Guard (seefigureB) Turn the protective guard to the required position and en- sure the protective guard is engaged. No tool is required for this. Fitting the abrasive tools u Remove the battery from the power tool before carry- ing out work on the power tool (e.g. maintenance, changing tool, etc.). The battery should also be re- moved for transport and storage. There is risk of injury from unintentionally pressing the on/off switch. u Do not touch grinding and cutting discs until they have cooled down. The discs can become very hot while work- ing. Clean the grinding spindle(8) and all parts to be mounted. To tighten or loosen the abrasive tools, push the spindle lock button(2) forwards and simultaneously turn the grinding tool to fix the grinding spindle in place. u Do not press the spindle lock button while the grind- ing spindle is moving. The power tool may become dam- aged if you do this. Grinding/cutting disc Pay attention to the dimensions of the abrasive tools. The diameter of the hole must match that of the mounting flange. Do not use an adapter or reducer. When using diamond cutting discs, make sure that the direc- tion of rotation arrow on the diamond cutting disc corres- ponds to the direction of rotation of the machine (see direc- tion of rotation arrow on the housing). See the graphics page for fitting instructions. To remove the grinding/cutting disc, push the spindle lock button(2) forwards while simultaneously turning on the grinding/cutting disc(12) in order to fix the grinding spindle(8) in place (seefigureC1). Use a hex key(13) to remove the clamping bolt with washer(11) and take off the grinding/cutting disc (12) (seefigureC2). To attach the grinding/cutting disc, screw in the clamping bolt with washer(11). Tighten the bolt using the hex key(13) until the washer of the bolt is flush with the grind- ing/cutting disc(12) (seefigureC3). Then push the spindle lock button(2) back again (seefig- ureC4). u After fitting the abrasive tool, check that the abrasive tool is fitted correctly and can turn freely before switching on the power tool. Make sure that the abras- ive tool does not brush against the protective guard or other parts. 1 609 92A 559 | (19.07.2019) Bosch Power ToolsEnglish | 11 Approved abrasive tools You can use all the abrasive tools mentioned in these operat- ing instructions. The permissible speed [min

] or the circumferential speed [m/s] of the abrasive tools used must at least match the val- ues given in the table. It is therefore important to observe the permissible rota- tional/circumferential speed on the label of the abrasive tool. max. [mm] [mm] D b d [min

Best for Hard Ceramic

Best for Hard Ceramic 切削

EU Declaration of Conformity We declare under our sole responsibility that the stated products comply with all applicable provisions of the directives and regulations listed below and are in conformity with the following standards. Technical file at: * Grinder Article number