GWS 18125 VLI Professional - Broyeur BOSCH - Free user manual and instructions

USER MANUAL GWS 18125 VLI Professional BOSCH

www.bosch-pt.com/serviceaddresses

General Power Tool Safety Warnings

WARNING Read all safety warnings, instruc-

tions, illustrations and specifica- 1 609 92A 767 | (07.03.2022) Bosch Power ToolsEnglish | 19

tions provided with this power tool. Failure to follow all in-

structions listed below may result in electric shock, fire and/

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-

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

u Keep children and bystanders away while operating a

power tool. Distractions can cause you to lose control.

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-

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

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

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-

u Use personal protective equipment. Always wear eye

protection. Protective equipment such as a dust mask,

non-skid safety shoes, hard hat or hearing protection

used for appropriate conditions will reduce personal in-

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-

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-

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 and clothing away from moving

parts. Loose clothes, jewellery or long hair can be caught

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.

u Do not let familiarity gained from frequent use of tools

allow you to become complacent and ignore tool

safety principles. A careless action can cause severe in-

jury within a fraction of a second.

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-

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 re-

move the battery pack, if detachable, from the power

tool before making any adjustments, changing ac-

cessories, or storing power tools. Such preventive

safety measures reduce the risk of starting the power tool

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 and accessories. Check for mis-

alignment 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.

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-

formed. Use of the power tool for operations different

from those intended could result in a hazardous situation.

u Keep handles and grasping surfaces dry, clean and

free from oil and grease. Slippery handles and grasping

Bosch Power Tools 1 609 92A 767 | (07.03.2022)20 | English

surfaces do not allow for safe handling and control of the

tool in unexpected situations.

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

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

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.

u Do not use a battery pack or tool that is damaged or

modified. Damaged or modified batteries may exhibit

unpredictable behaviour resulting in fire, explosion or risk

u Do not expose a battery pack or tool to fire or excess-

ive temperature. Exposure to fire or temperature above

130°C may cause explosion.

u Follow all charging instructions and do not charge the

battery pack or tool outside the temperature range

specified in the instructions. Charging improperly or at

temperatures outside the specified range may damage

the battery and increase the risk of fire.

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.

u Never service damaged battery packs. Service of bat-

tery packs should only be performed by the manufacturer

or authorized service providers.

Safety warnings for angle grinder

Safety warnings common for grinding, sanding, wire

brushing or cutting-off operations:

u This power tool is intended to function as a grinder,

sander, wire brush, hole cutter or cut-off tool. Read all

safety warnings, instructions, illustrations and spe-

cifications provided with this power tool. Failure to fol-

low all instructions listed below may result in electric

shock, fire and/or serious injury.

u Operations such as polishing are not to be performed

with this power tool. Operations for which the power

tool was not designed may create a hazard and cause per-

u Do not convert this power tool to operate in a way

which is not specifically designed and specified by the

tool manufacturer. Such a conversion may result in a

loss of control and cause serious personal injury.

u Do not use accessories which are not specifically de-

signed and specified 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 The dimensions of the accessory mounting must fit

the dimensions of the mounting hardware of the

power tool. 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 applications. The dust mask or respir-

ator must be capable of filtrating particles generated by

the particular application. Prolonged exposure to high in-

tensity 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 Hold the power tool by insulated gripping surfaces

only, when performing an operation where the cutting

tool may contact hidden wiring. Contact with a "live"

wire will also make exposed metal parts of the power tool

"live" and could give the operator an electric shock.

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-

1 609 92A 767 | (07.03.2022) Bosch Power ToolsEnglish | 21

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

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

u Do not operate the power tool near flammable materi-

als. Sparks could ignite these materials.

u Do not use accessories that require liquid coolants.

Using water or other liquid coolants may result in electro-

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

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 with both hands on the power tool

and position your body and arms 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 con-

trol torque reactions or kickback forces, if proper precau-

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

u Do not attach a saw chain woodcarving blade, seg-

mented diamond wheel with a peripheral gap greater

than 10 mm or toothed saw blade. Such blades create

frequent kickback and loss of control.

Safety warnings specific for grinding and cutting-off

u Use only wheel types that are specified 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.

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 the operator from broken

wheel fragments, accidental contact with wheel and

sparks that could ignite clothing.

u Wheels must be used only for specified applications.

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.

A wheel intended for larger power tool is not suitable for

the higher speed of a smaller tool and may burst.

u When using dual purpose wheels always use the cor-

rect guard for the application being performed. Failure

to use the correct guard may not provide the desired level

of guarding, which could lead to serious injury.

Additional safety warnings specific for cutting-off

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

u When the wheel is binding or when interrupting a cut

for any reason, switch off the power tool and hold it

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 elim-

inate 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

Bosch Power Tools 1 609 92A 767 | (07.03.2022)22 | English

and near the edge of the workpiece on both sides of the

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.

u Do not attempt to do curved cutting. 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, which can lead to serious in-

Safety warnings specific for sanding operations:

u Use proper sized sanding disc paper. Follow manufac-

turers recommendations, when selecting sanding pa-

per. Larger sanding paper extending too far beyond the

sanding pad presents a laceration hazard and may cause

snagging, tearing of the disc or kickback.

Safety warnings specific for wire brushing operations:

u Be aware that wire bristles are thrown by the brush

even during ordinary operation. Do not overstress the

wires by applying excessive load to the brush The wire

bristles can easily penetrate light clothing and/or skin.

u If the use of a guard is specified for wire brushing, do

not allow any interference of the wire wheel or brush

with the guard. Wire wheel or brush may expand in dia-

meter due to work load and centrifugal forces.

Additional safety information

Wear safety goggles.

The protective guard must not be used for

cutting. With a suitable adapter, the protective

guard can also be used for cutting.

Hold the power tool firmly with both hands

and make sure you have a stable footing. The

power tool can be more securely guided with

u For application tools with an internal thread, such as

brushes and diamond annular cutters, attention must

be paid to the max. thread length of the grinding

spindle. The spindle end must not touch the base of the

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-

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

u Secure the workpiece. A workpiece clamped with

clamping devices or in a vice is held more secure than by

u Store the application tools inside buildings, in a dry,

frost-free room at a uniform temperature.

u Remove the application tools before transporting the

power tool. This will allow you to avoid damage.

u Bonded cutting and grinding discs have an expiration

date, after which the discs must no longer be used.

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-

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

Product Description and

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-

The power tool is intended for cutting and brushing metal,

stone, plastic and composite materials, roughing metal,

plastic and composite materials as well as making holes in

stone materials using diamond annular cutters, without the

use of water. Make sure that the correct protective guard is

used(see "Operation", page28).

Sufficient dust extraction must be provided when cutting

With approved abrasive tools, the power tool can be used for

sanding with sanding discs.

The power tool must not be used to grind stone materials

with diamond grinding heads.

The numbering of the product features refers to the diagram

of the power tool on the graphics page.

1 609 92A 767 | (07.03.2022) Bosch Power ToolsEnglish | 23

Direction of rotation arrow on housing

Rechargeable battery

Rechargeable battery release button

Vibration-damping auxiliary handle (insulated grip-

Standard auxiliary handle (insulated gripping sur-

Locking screw for protective guard

Protective guard for grinding

Protective guard for cutting

Mounting flange with O‑ring

Diamond cutting disc

Quick-clamping nut with bar

Two-pin spanner for clamping nut/round nut

Handle (insulated gripping surface)

Diamond annular cutter

Extraction guard for cutting with cutting guides

Accessories shown or described are not included with the

product as standard. You can find the complete selection of

accessories in our accessories range.

Angle grinder GWS 18V-LI GWS 18-125 V-LI Article number

Rated voltage V= 18 18

Max. grinding disc diameter/rubber sanding pad diameter mm 115 125

Grinding spindle thread M 14 M 14

Max. thread length of grinding spindle mm 22 22

Weight according to EPTA-Procedure01:2014

Recommended ambient temperature during charging °C 0to+35 0to+35

Permitted ambient temperature during operation

Recommended rechargeable batteries GBA 18V...

Recommended chargers GAL 18...

A) Rated no-load speed for the selection of appropriate application tools in accordance with ENIEC62841-2-3. The actual speed is lower for

safety reasons and according to production tolerances.

Depends on rechargeable battery(5), protective guard((11), (10), (12)) and auxiliary handle((8), (7)) in use

C) Limited performance at temperatures <0°C Noise/Vibration Information

Noise emission values determined according to

Typically the A-weighted noise level of the power tool are: 85

(triax vector sum) and uncertainty K

determined according to ENIEC62841-2-3:

Surface grinding (roughing) and abrasive cutting:

Grinding thin metal sheets or other materials that tend to easily vi-

brate with a large surface area can cause the noise emission value to

increase by up to 15dB. Suitable, heavy damping mats can reduce

the increased noise emissions. Increased noise emissions must be

taken into consideration, both for the risk assessment of the noise

output and for selecting suitable hearing protection.

Bosch Power Tools 1 609 92A 767 | (07.03.2022)24 | English

The vibration level and noise emission value given in these

instructions have been measured in accordance with a

standardised measuring procedure and may be used to com-

pare power tools. They may also be used for a preliminary

estimation of vibration and noise emissions.

The stated vibration level and noise emission value repres-

ent the main applications of the power tool. However, if the

power tool is used for other applications, with different ap-

plication tools or is poorly maintained, the vibration level

and noise emission value may differ. This may significantly

increase the vibration and noise emissions over the total

To estimate vibration and noise emissions accurately, the

times when the tool is switched off or when it is running but

not actually being used should also be taken into account.

This may significantly reduce vibration and noise emissions

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 their hands warm,

and organising workflows correctly.

Rechargeable battery

Bosch sells some cordless power tools without a re-

chargeable battery. You can tell whether a rechargeable bat-

tery is included with the power tool by looking at the pack-

Charging the battery

u Use only the chargers listed in the technical data. Only

these chargers are matched to the lithium-ion battery of

Note: Lithium-ion rechargeable batteries are supplied par-

tially charged according to international transport regula-

tions. To ensure full rechargeable battery capacity, fully

charge the rechargeable battery before using your tool for

Inserting the Battery

Push the charged battery into the battery holder until it

Removing the Battery

To remove the rechargeable battery, press the battery re-

lease button and pull the battery out. Do not use force to do

The rechargeablebattery has two locking levels to prevent

the battery from falling out if the battery releasebutton is

pressed unintentionally. The rechargeable battery is held in

place by a spring when fitted in the power tool.

Battery charge indicator

The green LEDs on the battery charge indicator indicate the

state of charge of the battery. For safety reasons, it is only

possible to check the state of charge when the power tool is

Press the button for the battery charge indicator or to

show the state of charge. This is also possible when the bat-

If no LED lights up after pressing the button for the battery

charge indicator, then the battery is defective and must be

The state of charge of the battery is also displayed on the

user interface Status indications.

Battery model GBA 18V...

3× continuous green light 60–100%

2× continuous green light 30–60%

1× continuous green light 5–30%

1× flashing green light 0–5%

Battery model ProCORE18V...

5 × continuous green light 80–100%

4 × continuous green light 60–80%

3 × continuous green light 40–60%

2 × continuous green light 20–40%

1 × continuous green light 5–20%

1 × flashing green light 0–5%

Recommendations for Optimal Handling of the

Protect the battery against moisture and water.

Only store the battery within a temperature range of −20 to

50°C. Do not leave the battery in your car in the summer, for

Occasionally clean the ventilation slots on the battery using a

soft brush that is clean and dry.

A significantly reduced operating time after charging indic-

ates that the battery has deteriorated and must be replaced.

Follow the instructions on correct disposal.

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

1 609 92A 767 | (07.03.2022) Bosch Power ToolsEnglish | 25

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 grinding

Place the protective guard

(10) on the spindle collar.

Adjust the position of the pro-

tective guard (10) to meet

the requirements of the oper-

ation. Lock the protective

guard (10) by tightening the

locking screw (9) using the

u Adjust the protective guard (10) such that sparking in

the direction of the operator is prevented.

Note: The coding cams on the protective guard (10) ensure

that only a protective guard that is suitable for the power

Protective guard for cutting

u For cutting, always use the protective guard for

cutting(11) or the protective guard for grinding (10)

together with the cover for cutting(12).

u Provide sufficient dust extraction when cutting stone.

The protective guard for cutting(11) is fitted in the same

way as the protective guard for grinding(10).

Plastic cover for cutting

Attach the plastic cover for cutting(12) to the protective

guard for grinding(10) (see figureA). The cover(12) aud-

ibly and visually engages on the protective guard(10).

To remove the cover (see figureB), unlock the cover(12) on

the left- or right-hand side of the protective guard(10) (➊)

and remove the cover (➋).

Extraction guard for cutting with a guide block

The extraction guard for cutting with a cutting guide(33) is

fitted in the same way as the protective guard for grinding.

By securing the auxiliary handle(8)/(7) with the clip through

the extraction guard on the gearbox housing, the power tool

is firmly attached to the extraction guard. A suitable Bosch

dust extractor can be connected to the extraction guard with

a cutting guide(33). To do so, insert the vacuum hose with

dust extraction adapter into the provided receiving connec-

tion of the extraction guard.

Note: The friction generated by the dust in the vacuum hose

and accessory during extraction causes an electrostatic

charge that the user may experience as static discharge (de-

pending on environmental factors and their physiological

state). Bosch generally recommends using an anti-static va-

cuum hose (accessory) to vacuum up fine dust and dry ma-

u Always fit the hand guard (25) when working with the

rubber sanding pad (26) or with the cup brush/conical

brush/diamond annular cutter.

Attach the hand guard(25) to the auxiliary handle(8)/(7).

Standard auxiliary handle/low-vibration auxiliary handle

Screw the auxiliary handle (8)/(7) on the right or left of the

machine head depending on the working method.

u Do not operate your power tool without the auxiliary

u Do not continue to use the power tool if the auxiliary

handle (8)/(7) is damaged. Do not make any altera-

tions to the auxiliary handle (8)/(7).

The low-vibration auxiliary

handle (7) reduces vibra-

tion, enabling the tool to be

used safely and more com-

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-

Clean the grinding spindle (24) and all the parts to be fitted.

Lock the grinding spindle with the spindle lock button (2)

before clamping and releasing the abrasive tools.

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 disc/cutting disc/disc brush

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.

Note: When assembling bonded grinding or cutting discs

and disc brushes using the supplied mounting flange(13)

and the clamping nut(20) or quick-clamping nut(21), the

use of intermediate layers is not necessary.

To secure the grinding disc/cutting disc/disc brush, place

the mounting flange with O-ring(13) on the grinding

spindle(24) and screw on the clamping nut(20). Pay atten-

tion to the alignment of the clamping nut(20) depending on

the grinding disc/cutting disc/disc brush used (see figures in

the front part of the operating manual), and tighten it with

Bosch Power Tools 1 609 92A 767 | (07.03.2022)26 | English

the two-pin spanner(see " Quick-clamping nut

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

A plastic part (O-ring) is fitted around the cent-

ring collar in the mounting flange (13). If the

O-ring is missing or damaged, the mounting

flange (13) must be replaced before operation

Quick-clamping nut with bar

Grinding/Cutting Disc

Pay attention to the dimensions of the abrasive tools. The

diameter of the hole must match that of the hub flange. Do

not use an adapter or reducer.

When using diamond cutting discs, ensure that the arrow in-

dicating the direction of rotation on the diamond cutting disc

matches the direction of rotation of the power tool (see the

direction of rotation arrow on the machine head).

See the graphics page for fitting instructions.

Use the quick-clamping nut (19) to secure the grinding/cut-

ting disc without the need for additional tools.

Note: When assembling bonded grinding or cutting discs us-

ing the supplied mounting flange(13) and the quick-clamp-

ing nut(19), the use of intermediate layers is not necessary.

To secure the grinding/cutting disc, place the mounting

flange with O-ring(13) on the grinding spindle(24) and

screw on the quick-clamping nut(19).

Only use the quick-clamping nut (19) for grinding/cutting

discs up to a maximum diameter of 150mm.

u The quick-clamping nut (19) may be used only for

grinding or cutting discs.

u Only use quick-clamping nuts (19) that are in good

working order and not damaged.

u When screwing on, make sure that the printed side of

the quick-clamping nut (19) is not facing the grinding

u Always secure a grinding/cutting disc using only the

quick-clamping nut (19) supplied.

Press the spindle lock but-

ton (2) to lock the grinding

spindle. To tighten the

quick-clamping nut (19),

fold up the bar and turn the

quick-clamping nut firmly

clockwise. Then fold down

the bar to secure the quick-

clamping nut. It is not suf-

ficient to tighten the disc

Quick-clamping nuts (19)

that are properly secured

and not damaged can be re-

moved by hand. To do this,

fold up the bar and turn the

quick-clamping nut firmly

anticlockwise. If the quick-

clamping nut is stuck, do

not attempt to loosen it with

a tool – always use a two-

After fitting the hub flange

and the grinding/cutting

disc, the free thread length

of the grinding spindle must

Ensure that the abrasive

tool is firmly seated, so that

it does not twist away from

the spindle in the runout of the power tool.

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

A plastic part (O-ring) is fitted around the cent-

ring collar in the mounting flange (13). If the

O-ring is missing or damaged, the mounting

flange (13) must be replaced before operation

To change the abrasive tool easily without having to use any

additional tools, you can use the quick-clamping nut (21) in-

stead of the clamping nut (20).

u The quick-clamping nut (21) may be used only for

grinding or cutting discs.

Only use quick-clamping nuts (21) that are in good work-

ing order and not damaged.

When screwing on, make sure that the printed side of the

quick-clamping nut (21) is not facing the grinding disc;

the arrow must be pointing towards the index mark (34).

1 609 92A 767 | (07.03.2022) Bosch Power ToolsEnglish | 27

Press the spindle lock but-

ton (2) to lock the grinding

spindle. To tighten the

quick-clamping nut, turn

the grinding disc firmly

If the quick-clamping nut

has been attached correctly

and is not damaged, you

can loosen it by hand by

turning the knurled ring an-

ticlockwise. If the quick-

clamping nut is stuck, do

not attempt to loosen it

with pliers – always use

the two-pin spanner. Posi-

tion the two‑pin spanner as

shown in the figure.

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

A plastic part (O-ring) is fitted around the cent-

ring collar in the mounting flange (13). If the

O-ring is missing or damaged, the mounting

flange (13) must be replaced before operation

Approved abrasive tools

You can use all the abrasive tools mentioned in these operat-

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

Rotating the Machine Head

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.

The machine head can be

rotated in 90° increments.

In this way, the on/off

switch can be brought into

a more favourable handling

position for particular ap-

plications, e.g. for left-

Completely unscrew the

four screws. Rotate the ma-

chine head carefully, without removing it from the hous-

ing, into the new position. Screw in and retighten the four

Dust/Chip Extraction

Dust from materials such as lead-containing coatings, some

wood types, minerals and metal can be harmful to one’s

health. Touching or breathing-in the dust can cause allergic

reactions and/or lead to respiratory infections of the user or

Certain dust, such as oak or beech dust, is considered carci-

nogenic, especially in connection with wood-treatment ad-

ditives (chromate, wood preservative). Materials containing

asbestos may only be worked by specialists.

– Provide for good ventilation of the working place.

– It is recommended to wear a P2 filter-class respirator.

Bosch Power Tools 1 609 92A 767 | (07.03.2022)28 | English

Observe the relevant regulations in your country for the ma-

terials to be worked.

u Avoid dust accumulation at the workplace. Dust can

u Do not load the power tool so heavily that it comes to a

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 Exercise caution when cutting slots in structural walls;

see the "Information on structural design" section.

u Clamp the workpiece if it is not secure under its own

u If the power tool has been subjected to a heavy load,

continue to run it at no-load for several minutes to

cool down the accessory.

u Do not use the power tool with a cut-off stand.

u Do not touch grinding and cutting discs until they have

cooled down. The discs can become very hot while work-

If the power tool becomes electrostatically charged, the

built-in electronics will switch the power tool off. Press the

on/off switch (3) again to restart the power tool.

u Always use the protective guard for grinding(10)

when rough grinding with bonded abrasives.

u Never use cutting discs for rough grinding.

u When rough grinding, the protective guard for

cutting(11) or the protective guard for grinding(10)

with a fitted cover for cutting(12) can impact the

workpiece and lead to a loss of control.

The best rough grinding results are achieved with a set angle

of 30° to 40°. Move the power tool back and forth with mod-

erate pressure. This will ensure that the workpiece does not

become too hot or discolour and that grooves are not

u The protective guard for cutting(11) or the protective

guard for grinding(10) with a fitted cover for cutting(12)

must be used when using bonded discs which are ap-

proved for cutting and grinding.

Surface grinding with flap disc

u Always use the protective guard for grinding(10)

when grinding with the flap disc.

The flap disc (accessory) enables you to machine curved

surfaces and profiles. Flap discs have a considerably longer

service life, lower noise levels and lower grinding temperat-

ures than conventional grinding discs.

Surface grinding with sanding disc

u Always fit the hand guard (25) when working with the

rubber sanding pad (26).

Grinding with a sanding disc can be done without a protect-

See the graphics page for fitting instructions.

Screw on the round nut(28) and tighten it with the two-pin

Cup brush/disc brush/conical brush

u Always use the protective guard for grinding(10)

when brushing with disc brushes. Brushing with cup

brushes/conical brushes can be performed without

the protective guard.

u Always fit the hand guard (25) when working with the

cup brush or conical brush.

u The wires of the disc brush can get caught on the pro-

tective guard and break, if the maximum permitted di-

mensions of the disc brushes are exceeded.

See the graphics page for fitting instructions.

The cup brush/conical brush/disc brush with M14 thread

must be screwed onto the grinding spindle until it rests

firmly against the grinding spindle flange at the end of the

grinding spindle thread. Tighten the cup brush/conical

brush/disc brush with an open-ended spanner.

To fasten the disc brush with a diameter of 22.22mm, at-

tach the mounting flange with O-ring(13) to the grinding

spindle(24), screw on the round nut(28) and tighten with

the two-pin spanner.

u For cutting metal with bonded cutting discs or dia-

mond cutting discs, always use the protective guard

for cutting(11) or the protective guard for

grinding(10) with a fitted cover for cutting(12).

u When using the protective guard for grinding(10) for

cutting work with bonded cutting discs, there is an in-

creased risk of being exposed to sparks, particles and

disc fragments if the disc breaks.

When carrying out abrasive cutting, use a moderate feed

that is suited to the material being machined. Do not exert

pressure on the cutting disc and do not tilt or swing the

Do not attempt to reduce the speed of a cutting disc coming

to a stop by applying pressure from the side.

The power tool must always

work in an up-grinding mo-

tion. Otherwise there is a

risk that it will be pushed

uncontrolled out of the cut.

For best results when cut-

ting profiles and rectangular

tubing, start at the smallest

1 609 92A 767 | (07.03.2022) Bosch Power ToolsEnglish | 29

u For cutting stone with bonded cutting discs or dia-

mond cutting discs for concrete/stone, always use the

extraction guard for cutting with a cutting guide(33)

or the protective guard for cutting(11) or the protect-

ive guard for grinding (10) with a fitted cover for

u Provide sufficient dust extraction when cutting stone.

u The power tool may be used only for dry cutting/grind-

u When using the protective guard for cutting(11) , the

protective guard for grinding(10) or the protective

guard for grinding(10) with a fitted cover for

cutting(12) for cutting and grinding applications in

concrete or masonry, there is an increased dust load

and an increased risk of losing control of the power

tool, which can lead to kickback.

For cutting stone, it is best to use a diamond cutting disc.

When using the extraction guard for cutting with a cutting

guide(33), the dust extractor must be approved for extract-

ing stone dust. Suitable dust extractors are available from

Switch on the power tool

and position it with the

front part of the cutting

guide on the workpiece.

Move the power tool with a

moderate feed motion that

is suited to the material be-

When cutting especially

hard materials such as con-

crete with a high pebble content, the diamond cutting disc

can overheat and become damaged as a result. This is

clearly indicated by circular sparking, rotating with the dia-

If this happens, stop cutting and allow the diamond cutting

disc to cool down by running the power tool for a short time

at maximum speed with no load.

If work is noticeably slower and with circular sparking, this

indicates that the diamond cutting disc has become blunt.

You can resharpen the disc by briefly cutting into abrasive

material (e.g. lime-sand brick).

Cutting other materials

u For cutting materials such as plastic, composite ma-

terials, etc. with bonded cutting discs or Carbide Multi

Wheel cutting discs, always use the protective guard

for cutting(11) or the protective guard for

grinding(10) with a fitted cover for cutting (12). You

can achieve improved dust extraction by using the ex-

traction guard with a cutting guide(33).

Working with Diamond Annular Cutters

u Only use dry diamond annular cutters.

u Always fit the hand guard (25) when working with dia-

mond annular cutters.

Do not place the diamond annular cutter parallel to the work-

piece. Plunge it into the workpiece at an angle and in a circu-

lar motion. This will allow you to achieve optimal cooling and

ensure a longer tool life for the diamond annular cutter.

Information on structural design

Recesses in load-bearing walls are subject to country-spe-

cific regulations. These regulations must be observed under

all circumstances. Seek advice from the responsible struc-

tural engineer, architect or construction supervisor before

To start the power tool, push the on/off switch (3) forward.

To lock the on/off switch (3) in position, push the on/off

switch (3) forward and down until it clicks into place.

To switch off the power tool, release the on/off switch (3);

or, if the switch is locked, briefly push the on/off switch (3)

backward and down and then release it.

u Always check abrasive tools before using them. The

abrasive tool must be fitted properly and be able to

move freely. Carry out a test run for at least one

minute with no load. Do not use abrasive tools that are

damaged, run untrue or vibrate during use. Damaged

abrasive tools can burst apart and cause injuries.

Maintenance and Service

Maintenance and Cleaning

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 To ensure safe and efficient operation, always keep

the power tool and the ventilation slots clean.

Store and handle the accessories carefully.

After-Sales Service and Application Service

Our after-sales service responds to your questions concern-

ing maintenance and repair of your product as well as spare

parts. You can find explosion drawings and information on

spare parts at: www.bosch-pt.com

The Bosch product use advice team will be happy to help you

with any questions about our products and their accessor-

In all correspondence and spare parts orders, please always

include the 10‑digit article number given on the nameplate

Robert Bosch Ltd. (B.S.C.)

UB 9 5HJ At www.bosch-pt.co.uk you can order spare parts or arrange

the collection of a product in need of servicing or repair.

Tel. Service: (0344) 7360109

E-Mail: boschservicecentre@bosch.com

You can find further service addresses at:

www.bosch-pt.com/serviceaddresses

The recommended lithium-ion batteries are subject to legis-

lation on the transport of dangerous goods. The user can

transport the batteries by road without further require-

When shipping by third parties (e.g.: by air transport or for-

warding agency), special requirements on packaging and la-

belling must be observed. For preparation of the item being

shipped, consulting an expert for hazardous material is re-

Dispatch battery packs only when the housing is undam-

aged. Tape or mask off open contacts and pack up the bat-

tery in such a manner that it cannot move around in the

packaging. Please also observe the possibility of more de-

tailed national regulations.

Power tools, rechargeable batteries, accessor-

ies and packaging should be sorted for environ-

mental-friendly recycling.

Do not dispose of power tools and batteries/re-

chargeable batteries into household waste!

Only for EU countries:

According to the Directive 2012/19/EU on waste electrical

and electronic equipment and its transposition into national

law, power tools that are no longer usable, and, according to

the Directive 2006/66/EC, defective or drained batteries

must be collected separately and disposed of in an environ-

mentally correct manner.

If disposed incorrectly, waste electrical and electronic

equipment may have harmful effects on the environment and

human health, due to the potential presence of hazardous

Only for United Kingdom:

According to Waste Electrical and Electronic Equipment Reg-

ulations 2013 (2013/3113) and the Waste Batteries and

Accumulators Regulations 2009 (2009/890), power tools

that are no longer usable must be collected separately and

disposed of in an environmentally friendly manner.

Battery packs/batteries:

Please observe the notes in the section on transport (see

www.bosch-pt.com/serviceaddresses

www.bosch-pt.com/serviceaddresses

www.bosch-pt.com/serviceaddresses

www.bosch-pt.com/serviceaddresses

www.bosch-pt.com/serviceaddresses

Bosch Service Center

www.bosch-pt.com/serviceaddresses

Bosch Service Center

www.bosch-pt.com/serviceaddresses

www.bosch-pt.com/serviceaddresses

www.bosch-pt.com/serviceaddresses

www.bosch-pt.com/serviceaddresses

www.bosch-pt.com/serviceaddresses

Robert Bosch Sp. z o.o.

www.bosch-pt.com/serviceaddresses

www.bosch-pt.com/serviceaddresses

www.bosch-pt.com/serviceaddresses

www.bosch-pt.com/serviceaddresses

www.bosch-pt.com/serviceaddresses

www.bosch-pt.com/serviceaddresses

www.bosch-pt.com/serviceaddresses

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Robert Bosch SRL Service scule electrice

www.bosch-pt.com/bg/bg/

Други сервизни адреси ще откриете на:

www.bosch-pt.com/serviceaddresses

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www.bosch-pt.com/serviceaddresses

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Copyright © 2012–2020 STMicroelectronics

All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following con-

– Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

– Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclai-

mer in the documentation and/or other materials provided with the distribution.

– Neither the name of STMicroelectronics nor the names of its contributors may be used to endorse or promote products de-

rived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMI-

CLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Copyright © 2009–2020 ARM LIMITED All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following con-

– Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

– Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclai-

mer in the documentation and/or other materials provided with the distribution.

– Neither the name of ARM nor the names of its contributors may be used to endorse or promote products derived from this

software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMI-

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: *

Chairman of Executive

Head of Product Certification

Bosch Power Tools 1 609 92A 767 | (07.03.2022)IV

Declaration of Conformity

We declare under our sole responsibility that the stated products comply with all applicable provisions of the regulations lis-

ted below and are in conformity with the following standards.

Technical file at: Robert Bosch Ltd. (PT/SOP-GB), Broadwater Park, North Orbital Road, Uxbridge UB9 5HJ, United Kingdom

The Supply of Machinery (Safety) Regulations 2008

The Electromagnetic Compatibility Regulations 2016

The Restriction of the Use of Certain Hazardous Substances in

Electrical and Electronic Equipment Regulations 2012

Robert Bosch Power Tools GmbH, 70538 Stuttgart, Germany

represented (in terms of the above regulations) by

Robert Bosch Limited, Broadwater Park, North Orbital Road,

Uxbridge UB9 5HJ, United Kingdom

Managing Director - Bosch UK Martin Sibley

Head of Sales Operations and Aftersales

Robert Bosch Ltd. Broadwater Park, North Orbital Road, Uxbridge UB9 5HJ, United Kingdom, as authorised representative

acting on behalf of Robert Bosch Power Tools GmbH, 70538 Stuttgart, Germany

Place of issue: Uxbridge Date of issue: 21/01/2022

Bosch Power Tools 1 609 92A 767 | (07.03.2022)