GWS 850 C Professional - Broyeur BOSCH - Free user manual and instructions

USER MANUAL GWS 850 C Professional BOSCH

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Bosch Power Tools 1 609 92A 2V8 | (21.11.16)

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Bosch Power Tools 1 609 92A 2V8 | (29.11.16)

GWS 8-100 CE GWS 8-125 CE GWS 850 CE Professional

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General Power Tool Safety Warnings

Read all safety warnings and all instruc-

tions. Failure to follow the warnings and

instructions may result in electric shock, fire and/or serious

Save all warnings and instructions for future reference.

The term “power tool” in the warnings refers to your mains-

operated (corded) power tool or battery-operated (cordless)

 Keep work area clean and well lit. Cluttered or dark areas

 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

 Keep children and bystanders away while operating a

power tool. Distractions can cause you to lose control.

 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.

 Avoid body contact with earthed or grounded surfaces,

such as pipes, radiators, ranges and refrigerators.

There is an increased risk of electric shock if your body is

earthed or grounded.

 Do not expose power tools to rain or wet conditions.

Water entering a power tool will increase the risk of electric

 Do not abuse the cord. Never use the cord for carrying,

pulling or unplugging the power tool. Keep cord away

from heat, oil, sharp edges and moving parts. Damaged

or entangled cords increase the risk of electric shock.

 When operating a power tool outdoors, use an exten-

sion cord suitable for outdoor use. Use of a cord suitable

for outdoor use reduces the risk of electric shock.

 If operating a power tool in a damp location is unavoid-

able, use a residual current device (RCD) protected

supply. Use of an RCD reduces the risk of electric shock.

 Stay alert, watch what you are doing and use common

sense when operating a power tool. Do not use a power

tool while you are tired or under the influence of drugs,

alcohol or medication. A moment of inattention while op-

erating power tools may result in serious personal injury.

 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 injuries.

 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-

 Remove any adjusting key or wrench before turning

the power tool on. A wrench or a key left attached to a ro-

tating part of the power tool may result in personal injury.

 Do not overreach. Keep proper footing and balance at

all times. This enables better control of the power tool in

unexpected situations.

 Dress properly. Do not wear loose clothing or jewel-

lery. Keep your hair, clothing and gloves away from

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

caught in moving parts.

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

 Do not force the power tool. Use the correct power tool

for your application. The correct power tool will do the

job better and safer at the rate for which it was designed.

 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.

 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.

 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.

 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

 Keep cutting tools sharp and clean. Properly maintained

cutting tools with sharp cutting edges are less likely to bind

and are easier to control.

 Use the power tool, accessories and tool bits etc. in ac-

cordance with these instructions, taking into account

the working conditions and the work to be performed.

Use of the power tool for operations different from those

intended could result in a hazardous situation.

 Have your power tool serviced by a qualified repair per-

son using only identical replacement parts. This will en-

sure that the safety of the power tool is maintained.

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Bosch Power Tools 1 609 92A 2V8 | (21.11.16)

Safety Warnings for Angle Grinder

Safety Warnings common for Grinding, Sanding, Wire

Brushing or Abrasive Cutting Off Operations

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

sander, wire brush or cut-off tool. Read all safety warn-

ings, instructions, illustrations and specifications pro-

vided with this power tool. Failure to follow all instruc-

tions listed below may result in electric shock, fire and/or

 Operations such as polishing are not recommended to

be performed with this power tool. Operations for which

the power tool was not designed may create a hazard and

cause personal injury.

 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.

 The rated speed of the accessory must be at least equal

to the maximum speed marked on the power tool. Ac-

cessories running faster than their rated speed can break

 The outside diameter and the thickness of your acces-

sory must be within the capacity rating of your power

tool. Incorrectly sized accessories cannot be adequately

guarded or controlled.

 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 con-

 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 in-

stalling an accessory, position yourself and bystanders

away from the plane of the rotating accessory and run

the power tool at maximum no-load speed for one min-

ute. Damaged accessories will normally break apart during

 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 respirator

must be capable of filtrating particles generated by your

operation. Prolonged exposure to high intensity noise may

 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.

 Hold the power tool by insulated gripping surfaces on-

ly, when performing an operation where the cutting ac-

cessory may contact hidden wiring or its own cord. Cut-

ting accessory contacting a “live” wire may make exposed

metal parts of the power tool “live” and could give the op-

erator an electric shock.

 Position the cord clear of the spinning accessory. If you

lose control, the cord may be cut or snagged and your hand

or arm may be pulled into the spinning wheel.

 Never lay the power tool down until the accessory has

come to a complete stop. The spinning wheel may grab

the surface and pull the power tool out of your control.

 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.

 Regularly clean the power tool’s air vents. The motor’s

fan will draw the dust inside the housing and excessive accu-

mulation of powdered metal may cause electrical hazards.

 Do not operate the power tool near flammable materi-

als. Sparks could ignite these materials.

 Do not use accessories that require liquid coolants. Us-

ing water or other liquid coolants may result in electrocu-

Kickback and related warnings

 Kickback is a sudden reaction to a pinched or snagged ro-

tating wheel, backing pad, brush or any other accessory.

Pinching or snagging causes rapid stalling of the rotating

accessory which in turn causes the uncontrolled power

tool to be forced in the direction opposite of the accesso-

ry’s rotation at the point of the binding.

For example, if an abrasive wheel is snagged or pinched by

the workpiece, the edge of the wheel that is entering into

the pinch point can dig into the surface of the material

causing the wheel to climb out or kick out. The wheel may

either jump toward or away from the operator, depending

on direction of the wheel’s movement at the point of pinch-

ing. Abrasive wheels may also break under these condi-

Kickback is the result of power tool misuse and/or incor-

rect operating procedures or conditions and can be avoid-

ed by taking proper precautions as given below.

 Maintain a firm grip on the power tool and position your

body and arm to allow you to resist kickback forces. Al-

ways use auxiliary handle, if provided, for maximum

control over kickback or torque reaction during

start-up. The operator can control torque reactions or

kickback forces, if proper precautions are taken.

 Never place your hand near the rotating accessory. Ac-

cessory may kickback over your hand.

 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

 Use special care when working corners, sharp edges,

etc. Avoid bouncing and snagging the accessory. Cor-

ners, sharp edges or bouncing have a tendency to snag the

rotating accessory and cause loss of control or kickback.

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1 609 92A 2V8 | (21.11.16) Bosch Power Tools

 Do not attach a saw chain woodcarving blade or

toothed saw blade. Such blades create frequent kickback

and loss of control.

Safety warnings specific for Grinding and Abrasive

Cutting-Off operations

 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 de-

signed cannot be adequately guarded and are unsafe.

 The grinding surface of the centre depressed wheels

must be mounted below the plane of the guard lip. An

improperly mounted wheel that projects through the plane

of the guard lip cannot be adequately protected.

 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 frag-

ments, accidental contact with wheel and sparks that

could ignite clothing.

 Wheels must be used only for recommended applica-

tions. For example: do not grind with the side of the

cut-off wheel. Abrasive cut-off wheels are intended for

peripheral grinding; side forces applied to these wheels

may cause them to shatter.

 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 possi-

bility of wheel breakage. Flanges for cut-off wheels may be

different from grinding wheel flanges.

 Do not use worn down reinforced wheels from larger

power tools. Wheels intended for larger power tools are

not suitable for the higher speed of a smaller tool and may

Additional safety warnings specific for abrasive cutting

 Do not “jam” the cut-off wheel or apply excessive pres-

sure. Do not attempt to make an excessive depth of cut.

Overstressing the wheel increases the loading and suscep-

tibility to twisting or binding of the wheel in the cut and the

possibility of kickback or wheel breakage.

 Do not position your body in line with and behind the

rotating wheel. When the wheel, at the point of operation,

is moving away from your body, the possible kickback may

propel the spinning wheel and the power tool directly at

 When wheel is binding or when interrupting a cut for

any reason, switch off the power tool and hold the pow-

er tool motionless until the wheel comes to a complete

stop. Never attempt to remove the cut-off wheel from

the cut while the wheel is in motion otherwise kickback

may occur. Investigate and take corrective action to elimi-

nate the cause of wheel binding.

 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.

 Support panels or any oversized workpiece to minimize

the risk of wheel pinching and kickback. Large work-

pieces 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.

 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

Safety warnings specific for sanding operations

 Do not use excessively oversized sanding disc paper.

Follow manufacturers recommendations, when select-

ing sanding paper. Larger sanding paper extending be-

yond the sanding pad presents a laceration hazard and

may cause snagging, tearing of the disc, or kickback.

Safety warnings specific for wire brushing operations

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.

 If the use of a guard is recommended for wire brushing,

do not allow any interference of the wire wheel or

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

diameter due to work load and centrifugal forces.

Additional safety warnings

Wear safety goggles.

 Use suitable detectors to determine if utility lines are

hidden in the work area or call the local utility company

for assistance. Contact with electric lines can lead to fire

and electric shock. Damaging a gas line can lead to explo-

sion. Penetrating a water line causes property damage or

may cause an electric shock.

 Release the On/Off switch and set it to the off position

when the power supply is interrupted, e. g., in case of a

power failure or when the mains plug is pulled. This pre-

vents uncontrolled restarting.

 Secure the workpiece. A workpiece clamped with clamp-

ing devices or in a vice is held more secure than by hand.

 Products sold in GB only: Your product is fitted with a

BS 1363/A approved electric plug with internal fuse

(ASTA approved to BS 1362).

If the plug is not suitable for your socket outlets, it should

be cut off and an appropriate plug fitted in its place by an

authorised customer service agent. The replacement plug

should have the same fuse rating as the original plug.

The severed plug must be disposed of to avoid a possible

shock hazard and should never be inserted into a mains

Products sold in AUS and NZ only: Use a residual current

device (RCD) with a rated residual current of 30 mA or

OBJ_BUCH-708-005.book Page 8 Monday, November 21, 2016 10:43 AMEnglish | 9 Bosch Power Tools 1 609 92A 2V8 | (21.11.16) Product Description and Specifica-

Read all safety warnings and all instruc-

tions. Failure to follow the warnings and in-

structions may result in electric shock, fire

and/or serious injury.

The machine is intended for cutting, roughing and brushing of

metal and stone materials without the use of water.

For cutting with bonded abrasives, a special cutting guard

(accessory) must be used.

When cutting in stone, provide for sufficient dust extraction.

With approved sanding tools, the machine can be used for

sanding with sanding discs.

The numbering of the product features refers to the illustra-

1 Spindle lock button

3 Thumbwheel for speed preselection

(GWS 8-100 CE/GWS 8-125 CE/GWS 850 CE)

4 Auxiliary handle (insulated gripping surface)

6 Combination spanner for M 10 grinder spindle*

8 Protection guard for grinding

9 Locking screw for protection guard

10 Mounting flange with O-ring

15 Protection guard for cutting*

22 Cutting guide with dust extraction protection guard *

23 Diamond cutting disc*

24 Handle (insulated gripping surface)

*Accessories shown or described are not part of the standard de-

livery scope of the product. A complete overview of accessories

can be found in our accessories program.

Speed control adjustment

Reduced starting current

Constant electronic control

Weight according to EPTA-Procedure 01:2014

The values given are valid for a nominal voltage [U] of 230 V. For different voltages and models for specific countries, these values can vary.

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1 609 92A 2V8 | (21.11.16) Bosch Power Tools

Mounting the Protective Devices

 Before any work on the machine itself, pull the mains

Note: After breakage of the grinding disc during operation or

damage to the holding fixtures on the protection guard/power

tool, the machine must promptly be sent to an after-sales ser-

vice agent for maintenance. For addresses, see section “Af-

ter-sales Service and Application Service”.

Protection Guard for Grinding

Place the protection guard 8 on the spindle collar. Adapt the

position of the protection guard 8 to the requirements of the

work step. Lock protection guard 8 by tightening locking

screw 9 with combination spanner 5/6.

 Adjust the protection guard 8 in such a manner that

sparking is prevented in the direction of the operator.

Note: The encoding keys on the protection guard 8 ensure

that only a protection guard that fits the machine type can be

Protection Guard for Cutting

 For cutting with bonded abrasives, always use the pro-

tection guard for cutting 15.

 Provide for sufficient dust extraction when cutting

The protection guard for cutting 15 is mounted in the same

manner as the protection guard for grinding 8.

Cutting Guide with Dust Extraction Protection Guard

The cutting guide with dust extraction protection guard 22 is

mounted in the same manner as the protection guard for

 Operate your machine only with the auxiliary handle 4.

Screw the auxiliary handle 4 on the right or left of the machine

head depending on the working method.

 For operations with the rubber sanding plate 18 or with

the cup brush/wheel brush/flap disc, always mount the

The hand guard 17 is fastened with the auxiliary handle 4.

Mounting the Grinding Tools

 Before any work on the machine itself, pull the mains

 Do not touch grinding and cutting discs before they

have cooled down. The discs can become very hot while

Clean the grinder spindle 7 and all parts to be mounted.

For clamping and loosening the grinding tools, lock the grind-

er spindle with the spindle lock button 1.

 Actuate the spindle lock button only when the grinder

spindle is at a standstill. Otherwise, the machine may be-

Grinding/Cutting Disc

Pay attention to the dimensions of the grinding tools. The

mounting hole diameter must fit the mounting flange without

play. Do not use reducers or adapters.

When using diamond cutting discs, pay attention that the di-

rection-of-rotation arrow on the diamond cutting disc and the

direction of rotation of the machine (see direction-of-rotation

arrow on the machine head) agree.

See graphics page for the mounting sequence.

To fasten the grinding/cutting disc, screw on the clamping nut

12 and tighten it with the combination spanner 5/6, (see sec-

tion “Quick-clamping Nut”).

 After mounting the grinding tool and before switching

on, check that the grinding tool is correctly mounted

and that it can turn freely. Make sure that the grinding

tool does not graze against the protection guard or oth-

Speed control adjustment

Reduced starting current

Constant electronic control

Weight according to EPTA-Procedure 01:2014

8-125 CE 850 C 850 CE The values given are valid for a nominal voltage [U] of 230 V. For different voltages and models for specific countries, these values can vary.

OBJ_BUCH-708-005.book Page 10 Monday, November 21, 2016 10:43 AMEnglish | 11 Bosch Power Tools 1 609 92A 2V8 | (21.11.16) Mounting flange for grinding spindle

M 14: A plastic part (O-ring) is fitted

around the centring collar of mounting

flange 10. If the O-ring is missing or

damaged, the mounting flange 10

must be replaced before resuming op-

Mounting flange for grinding spindle

M 10: The mounting flange can be used

 For operations with the flap disc, always mount the

Rubber Sanding Plate

 For operations with the rubber sanding plate 18, al-

ways mount the hand guard 17.

See graphics page for the mounting sequence.

Screw on round nut 20 and tighten it with the combination

Cup Brush/Disc Brush

 For operations with the cup brush/wheel brush, always

mount the hand guard 17.

See graphics page for the mounting sequence.

The cup brush/disc brush must be able to be screwed onto

the grinder spindle until it rests firmly against the grinder

spindle flange at the end of the grinder spindle threads. Tight-

en the cup brush/disc brush with an open-end spanner.

For convenient changing of grinding tools without the use of

additional tools, you can use the quick-clamping nut 13 in-

stead of the clamping nut 12.

 The quick-clamping nut 13 may be used only for grind-

ing or cutting discs.

Use only a flawless, undamaged quick-clamping nut 13.

When screwing on, pay attention that the side of the

quick-clamping nut 13 with printing does not face the

grinding disc; the arrow must point to the index mark 25.

Lock the grinder spindle with

the spindle lock button 1. To

tighten the quick-clamping

nut, firmly turn the grinding

disc in clockwise direction.

A properly fastened, undam-

aged quick-clamping nut can

be manually loosened by

turning the knurled ring in an-

ticlockwise direction.

Never loosen a tight quick-

clamping nut using pliers;

always use the combination

tion spanner 5/6 as shown in

Approved Grinding Tools

All grinding tools mentioned in these operating instructions

The permissible speed [min

] or the circumferential speed

[m/s] of the grinding tools used must at least match the values

Therefore, observe the permissible rotational/circumferen-

tial speed on the label of the grinding tool.

Rotating the Machine Head

 Before any work on the machine itself, pull the mains

The machine head can be

rotated with respect to

the machine housing in

90° steps. In this man-

ner, the On/Off switch

can be brought into a

more convenient posi-

Completely unscrew the

four screws. Rotate the

machine head carefully,

without removing it from the housing, to the new position.

Screw in and tighten the four screws again.

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1 609 92A 2V8 | (21.11.16) Bosch Power Tools

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 bystanders.

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

cinogenic, especially in connection with wood-treatment

additives (chromate, wood preservative). Materials con-

taining asbestos may only be worked by specialists.

– As far as possible, use a dust extraction system suitable

– Provide for good ventilation of the working place.

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

Observe the relevant regulations in your country for the

materials to be worked.

 Prevent dust accumulation at the workplace. Dust can

 Observe correct mains voltage! The voltage of the pow-

er source must agree with the voltage specified on the

nameplate of the machine. Power tools marked with

230 V can also be operated with 220 V.

 Hold power tool by insulated gripping surfaces 24 and

auxiliary handle 4 only. The accessory may contact hid-

den wiring or its own cord. Accessory contacting a “live”

wire may make exposed metal parts of the power tool “live”

and shock the operator.

When operating the machine with power from mobile genera-

tors that do not have sufficient reserve capacity or are not

equipped with suitable voltage control with starting current

amplification, loss of performance or untypical behavior can

occur upon switching on.

Please observe the suitability of the power generator being

used, particularly with regard to the mains voltage and fre-

Switching On and Off

To start the power tool, push the On/Off switch 2 forwards.

To lock the On/Off switch 2, press the On/Off switch 2 down

at the front until it latches.

To switch off the power tool, release the On/Off switch 2 or,

if it is locked, briefly push down the back of the On/Off switch

2 and then release it.

To save energy, only switch the power tool on when using it.

 Check grinding tools before using. The grinding tool

must be mounted properly and be able to move freely.

Carry out a test run for at least one minute with no load.

Do not use damaged, out-of-centre or vibrating grind-

ing tools. Damaged grinding tools can burst and cause in-

Reduced starting current

The electronic reduced starting current limits the power con-

sumption when switching the tool on and enables operation

from a 13 ampere fuse.

Constant Electronic Control

Constant electronic control holds the speed constant at no-

load and under load, and ensures uniform working perfor-

Speed preselection (GWS 8-100 CE/GWS 8-125 CE/GWS 850 CE)

The required speed can be preselected with the thumbwheel 3 (also while running).

The data in the following table are recommended values.

 Exercise caution when cutting slots in structural walls;

see Section “Information on Structures”.

 Clamp the workpiece if it does not remain stationary

due to its own weight.

 Do not strain the machine so heavily that it comes to a

 After heavily straining the power tool, continue to run

it at no-load for several minutes to cool down the acces-

 Do not touch grinding and cutting discs before they

have cooled down. The discs can become very hot while

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

 Never use a cutting disc for roughing.

The best roughing results are achieved when setting the ma-

chine at an angle of 30° to 40°. Move the machine back and

forth with moderate pressure. In this manner, the workpiece

will not become too hot, does not discolour and no grooves

Material Application Accessory Thumbwheel Position

Metal Removing paint Sanding disc 2 – 3

Wood, metal Brushing, rust removal Cup brush, sanding disc 3

Metal, masonry Grinding Grinding disc 4 – 6

Metal Rough grinding Grinding disc 6

Cutting disc and cutting guide

(Cutting masonry/stone is permitted only with use of

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Bosch Power Tools 1 609 92A 2V8 | (21.11.16)

With the flap disc (accessory), curved surfaces and profiles

Flap discs have a considerably higher service life, lower noise

levels and lower sanding temperatures than conventional

 For cutting with bonded abrasives, always use the pro-

tection guard for cutting 15.

When cutting, work with moderate feed, adapted to the mate-

rial being cut. Do not exert pressure onto the cutting disc, tilt

or oscillate the machine.

Do not reduce the speed of running down cutting discs by ap-

plying sideward pressure.

The machine must al-

grinding motion. Other-

wise, the danger exists

of it being pushed un-

controlled out of the

When cutting profiles and square bar, it is best to start at the

smallest cross section.

 Provide for sufficient dust extraction when cutting

 Wear a dust respirator.

 The machine may be used only for dry cutting/grinding.

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

When using the cutting guide with dust extraction protection

guard 22, the vacuum cleaner must be approved for vacuum-

ing masonry dust. Suitable vacuum cleaners are available

Switch on the machine

and place the front part

of the cutting guide on

the workpiece. Slide the

machine with moderate

feed, adapted to the ma-

terial to be worked.

For cutting especially hard material, e. g., concrete with high

pebble content, the diamond cutting disc can overheat and

become damaged as a result. This is clearly indicated by cir-

cular sparking, rotating with the diamond cutting disc.

In this case, interrupt the cutting process and allow the dia-

mond cutting disc to cool by running the machine for a short

time at maximum speed with no load.

Noticeably decreasing work progress and circular sparking

are indications of a diamond cutting disc that has become

dull. Briefly cutting into abrasive material (e. g. lime-sand

brick) can resharpen the disc again.

Information on Structures

Slots in structural walls are subject to the Standard DIN 1053

Part 1, or country-specific regulations.

These regulations are to be observed under all circumstanc-

es. Before beginning work, consult the responsible structural

engineer, architect or the construction supervisor.

Maintenance and Service

Maintenance and Cleaning

 Before any work on the machine itself, pull the mains

 For safe and proper working, always keep the machine

and ventilation slots clean.

 In extreme conditions, always use dust extraction as

far as possible. Blow out ventilation slots frequently

and install a portable residual current device (PRCD).

When working metals, conductive dust can settle in the in-

terior of the power tool. The total insulation of the power

tool can be impaired.

Please store and handle the accessory(-ies) carefully.

If the replacement of the supply cord is necessary, this has to

be done by Bosch or an authorized Bosch service agent in or-

der to avoid a safety hazard.

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. Exploded views and information on spare parts can al-

Bosch’s application service team will gladly answer questions

concerning our products and their accessories.

In all correspondence and spare parts orders, please always

include the 10-digit article number given on the nameplate of

OBJ_BUCH-708-005.book Page 13 Monday, November 21, 2016 10:43 AM14 | English

1 609 92A 2V8 | (21.11.16) Bosch Power Tools

HK and Macau Special Administrative Regions

Robert Bosch Hong Kong Co. Ltd.

21st Floor, 625 King’s Road

North Point, Hong Kong

28th Floor Fort Legend Towers,

3rd Avenue corner 31st Street,

Fort Bonifacio Global City,

1634 Taguig City, Philippines

Bosch Service Center:

9725-27 Kamagong Street

Makati City, Philippines

Liberty Square Building

Bosch Service – Training Centre

La Salle Tower Ground Floor Unit No.2

10/11 La Salle Moo 16

Powerwell Service Centre Ptd Ltd

Robert Bosch Vietnam Co. Ltd

13th Floor , 194 Golden Building

473 Dien Bien Phu Street

Ward 25, Binh Thanh District

www.baohanhbosch-pt.com.vn

Australia, New Zealand and Pacific Islands

Robert Bosch Australia Pty. Ltd.

Customer Contact Center

OBJ_BUCH-708-005.book Page 16 Monday, November 21, 2016 10:43 AM中文 | 17

(GWS 8- 100 CE/GWS 8- 125 CE/GWS 850 CE)

(GWS 8- 100 CE/GWS 8- 125 CE/GWS 850 CE)

OBJ_BUCH-708-005.book Page 29 Monday, November 21, 2016 10:43 AM30 | 한국어 1 609 92A 2V8 | (21.11.16) Bosch Power Tools 維修和服務

OBJ_BUCH-708-005.book Page 31 Monday, November 21, 2016 10:43 AM32 | 한국어

OBJ_BUCH-708-005.book Page 32 Monday, November 21, 2016 10:43 AM한국어 | 33

OBJ_BUCH-708-005.book Page 33 Monday, November 21, 2016 10:43 AM34 | 한국어

OBJ_BUCH-708-005.book Page 34 Monday, November 21, 2016 10:43 AM한국어 | 35

OBJ_BUCH-708-005.book Page 36 Monday, November 21, 2016 10:43 AM한국어 | 37 Bosch Power Tools 1 609 92A 2V8 | (21.11.16) 작동

OBJ_BUCH-708-005.book Page 37 Monday, November 21, 2016 10:43 AM38 | 한국어

Bosch Korea, RBKR Mechanics and Electronics Ltd.

 OBJ_BUCH-708-005.book Page 39 Monday, November 21, 2016 10:43 AM40 | 

OBJ_BUCH-708-005.book Page 40 Monday, November 21, 2016 10:43 AM | 41

OBJ_BUCH-708-005.book Page 42 Monday, November 21, 2016 10:43 AM | 43

OBJ_BUCH-708-005.book Page 43 Monday, November 21, 2016 10:43 AM44 | 

OBJ_BUCH-708-005.book Page 45 Monday, November 21, 2016 10:43 AM46 | 

OBJ_BUCH-708-005.book Page 46 Monday, November 21, 2016 10:43 AM | 47 Bosch Power Tools 1 609 92A 2V8 | (21.11.16) 

OBJ_BUCH-708-005.book Page 49 Monday, November 21, 2016 10:43 AM50 | Bahasa Indonesia

OBJ_BUCH-708-005.book Page 50 Monday, November 21, 2016 10:43 AMBahasa Indonesia | 51

/II /II /II OBJ_BUCH-708-005.book Page 52 Monday, November 21, 2016 10:43 AMBahasa Indonesia | 53

OBJ_BUCH-708-005.book Page 54 Monday, November 21, 2016 10:43 AMBahasa Indonesia | 55

OBJ_BUCH-708-005.book Page 55 Monday, November 21, 2016 10:43 AM56 | Bahasa Indonesia

OBJ_BUCH-708-005.book Page 57 Monday, November 21, 2016 10:43 AM58 | Tiếng Việt

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OBJ_BUCH-708-005.book Page 59 Monday, November 21, 2016 10:43 AM60 | Tiếng Việt

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OBJ_BUCH-708-005.book Page 61 Monday, November 21, 2016 10:43 AM62 | Tiếng Việt

(chuẩn EPTA 01:2014)

(chuẩn EPTA 01:2014)

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OBJ_BUCH-708-005.book Page 65 Monday, November 21, 2016 10:43 AM66 | Tiếng Việt

AVERTISSEMENT OBJ_BUCH-708-005.book Page 67 Monday, November 21, 2016 10:43 AM68 | Français

OBJ_BUCH-708-005.book Page 68 Monday, November 21, 2016 10:43 AMFrançais | 69

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OBJ_BUCH-708-005.book Page 74 Monday, November 21, 2016 10:43 AMFrançais | 75

standard Metal OBJ_BUCH-708-005.book Page 96 Monday, November 21, 2016 10:43 AM| 97

OBJ_BUCH-708-005.book Page 97 Monday, November 21, 2016 10:43 AM