GWSProfessional - Rapid Electronics Page 1 Wednesday, October 5, 2016 3:16 PM
Robert Bosch Power Tools GmbH
70538 Stuttgart
1 609 92A 2C8 (2016.10) O / 297
GWS Professional
22-180 H | 22-180 JH | 22-230 H | 22-230 JH | 24-180 JH | 24-230 H |
24-230 JH | 26-180 JH | 26-230 JH
Original instructions
Notice originale
Manual original
Manual original
Istruzioni originali
da Original brugsanvisning
sv Bruksanvisning i original
no Original driftsinstruks
fi Alkuperäiset ohjeet
el Πρωτότυπο οδηγιών χρήσης
Orijinal işletme talimatı
Instrukcja oryginalna
Původní návod k používání
Pôvodný návod na použitie
Eredeti használati utasítás
Оригинальное руководство
по эксплуатации
Оригінальна інструкція з
Пайдалану нұсқаулығының
Instrucţiuni originale
Оригинална инструкция
Оригинално упатство за работа
Originalno uputstvo za rad
Izvirna navodila
Originalne upute za rad
Algupärane kasutusjuhend
Instrukcijas oriģinālvalodā
Originali instrukcija
ΖЎϩʉ ˒μВЖЙʉʓ ИͳϞφЁʑ Page 4 Thursday, September 29, 2016 3:34 PM
1 609 92A 2C8 | (29.9.16)
Bosch Power Tools
1 609 92A 2C8 | (29.9.16)
Bosch Power Tools Page 15 Thursday, September 29, 2016 3:35 PM
English | 15
Robert Bosch Power Tools GmbH
Servicezentrum Elektrowerkzeuge
Zur Luhne 2
37589 Kalefeld – Willershausen
Unter können Sie online Ersatzteile bestellen oder Reparaturen anmelden.
Kundendienst: Tel.: (0711) 40040460
Fax: (0711) 40040461
Anwendungsberatung: Tel.: (0711) 40040460
Fax: (0711) 40040462
Unter können Sie online Ersatzteile bestellen.
Tel.: (01) 797222010
Fax: (01) 797222011
Unter können Sie online Ersatzteile bestellen.
Tel.: (044) 8471511
Fax: (044) 8471551
Tel.: +32 2 588 0589
Fax: +32 2 588 0595
Elektrowerkzeuge, Zubehör und Verpackungen sollen einer
umweltgerechten Wiederverwertung zugeführt werden.
Werfen Sie Elektrowerkzeuge nicht in den Hausmüll!
Nur für EU-Länder:
Gemäß der Europäischen Richtlinie
2012/19/EU über Elektro- und ElektronikAltgeräte und ihrer Umsetzung in nationales
Recht müssen nicht mehr gebrauchsfähige
Elektrowerkzeuge getrennt gesammelt und
einer umweltgerechten Wiederverwertung
zugeführt werden.
Änderungen vorbehalten.
Safety Notes
General Power Tool Safety Warnings
WARNING Read all safety warnings and all instructions. Failure to follow the warnings and
instructions may result in electric shock, fire and/or serious
Bosch Power Tools
Save all warnings and instructions for future reference.
The term “power tool” in the warnings refers to your mainsoperated (corded) power tool or battery-operated (cordless)
power tool.
Work area safety
 Keep work area clean and well lit. Cluttered or dark areas
invite accidents.
 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.
 Keep children and bystanders away while operating a
power tool. Distractions can cause you to lose control.
Electrical safety
 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 extension 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 unavoidable, use a residual current device (RCD) protected
supply. Use of an RCD reduces the risk of electric shock.
Personal safety
 Stay alert, watch what you are doing and use common
sense when operating a power tool. Do not use a power
tool while you are tired or under the influence of drugs,
alcohol or medication. A moment of inattention while operating power tools may result in serious personal injury.
 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 energising power tools that have the switch on invites accidents.
 Remove any adjusting key or wrench before turning
the power tool on. A wrench or a key left attached to a rotating part of the power tool may result in personal injury.
1 609 92A 2C8 | (29.9.16) Page 16 Thursday, September 29, 2016 3:35 PM
16 | English
 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 jewellery. 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 extraction and collection facilities, ensure these are connected and properly used. Use of dust collection can reduce 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 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
 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 accordance with these instructions, taking into account
the working conditions and the work to be performed.
Use of the power tool for operations different from those
intended could result in a hazardous situation.
 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, 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 warnings, instructions, illustrations and specifications provided with this power tool. Failure to follow all instructions listed below may result in electric shock, fire and/or
serious injury.
1 609 92A 2C8 | (29.9.16)
 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 designed 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. Accessories running faster than their rated speed can break
and fly apart.
 The outside diameter and the thickness of your accessory must be within the capacity rating of your power
tool. Incorrectly sized accessories cannot be adequately
guarded or controlled.
 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.
 Do not use a damaged accessory. Before each use inspect 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 install an undamaged accessory. After inspecting and installing an accessory, position yourself and bystanders
away from the plane of the rotating accessory and run
the power tool at maximum no-load speed for one minute. Damaged accessories will normally break apart during
this test time.
 Wear personal protective equipment. Depending on
application, use face shield, safety goggles or safety
glasses. As appropriate, wear dust mask, hearing protectors, gloves and workshop apron capable of stopping small abrasive or workpiece fragments. The eye
protection must be capable of stopping flying debris generated by various operations. The dust mask or respirator
must be capable of filtrating particles generated by your
operation. Prolonged exposure to high intensity noise may
cause hearing loss.
 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 only, when performing an operation where the cutting accessory may contact hidden wiring or its own cord. Cutting accessory contacting a “live” wire may make exposed
metal parts of the power tool “live” and could give the operator an electric shock.
 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.
Bosch Power Tools Page 17 Thursday, September 29, 2016 3:35 PM
English | 17
 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 accumulation of powdered metal may cause electrical hazards.
 Do not operate the power tool near flammable materials. Sparks could ignite these materials.
 Do not use accessories that require liquid coolants.
Using water or other liquid coolants may result in electrocution or shock.
Kickback and related warnings
 Kickback is a sudden reaction to a pinched or snagged rotating wheel, backing pad, brush or any other accessory.
Pinching or snagging causes rapid stalling of the rotating
accessory which in turn causes the uncontrolled power
tool to be forced in the direction opposite of the accessory’s rotation at the point of the binding.
For example, if an abrasive wheel is snagged or pinched by
the workpiece, the edge of the wheel that is entering into
the pinch point can dig into the surface of the material
causing the wheel to climb out or kick out. The wheel may
either jump toward or away from the operator, depending
on direction of the wheel’s movement at the point of pinching. Abrasive wheels may also break under these conditions.
Kickback is the result of power tool misuse and/or incorrect operating procedures or conditions and can be avoided by taking proper precautions as given below.
 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 reactions or
kickback forces, if proper precautions are taken.
 Never place your hand near the rotating accessory. Accessory 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
point of snagging.
 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.
 Do not attach a saw chain woodcarving blade or
toothed saw blade. Such blades create frequent kickback
and loss of control.
Bosch Power Tools
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 selected wheel. Wheels for which the power tool was not designed 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 fragments, accidental contact with wheel and sparks that
could ignite clothing.
 Wheels must be used only for recommended applications. For example: do not grind with the side of the
cut-off wheel. Abrasive cut-off wheels are intended for
peripheral grinding; side forces applied to these wheels
may cause them to shatter.
 Always use undamaged wheel flanges that are of correct size and shape for your selected wheel. Proper
wheel flanges support the wheel thus reducing the possibility of wheel breakage. Flanges for cut-off wheels may be
different from grinding wheel flanges.
 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
off operations
 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.
 Do not position your body in line with and behind the rotating wheel. When the wheel, at the point of operation, is
moving away from your body, the possible kickback may
propel the spinning wheel and the power tool directly at you.
 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 complete
stop. Never attempt to remove the cut-off wheel from
the cut while the wheel is in motion otherwise kickback
may occur. Investigate and take corrective action to eliminate the cause of wheel binding.
 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 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.
1 609 92A 2C8 | (29.9.16) Page 18 Thursday, September 29, 2016 3:35 PM
18 | English
 Use extra caution when making a “pocket cut” into existing walls or other blind areas. The protruding wheel
may cut gas or water pipes, electrical wiring or objects that
can cause kickback.
Safety warnings specific for sanding operations
 Do not use excessively oversized sanding disc paper.
Follow manufacturers recommendations, when selecting sanding paper. Larger sanding paper extending 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
 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 explosion. 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 prevents uncontrolled restarting.
 Do not touch grinding and cutting discs before they
have cooled down. The discs can become very hot while
 Secure the workpiece. A workpiece clamped with clamping 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
socket elsewhere.
Products sold in AUS and NZ only: Use a residual current
device (RCD) with a rated residual current of 30 mA or
1 609 92A 2C8 | (29.9.16)
Product Description and Specifications
Read all safety warnings and all instructions. Failure to follow the warnings and instructions may result in electric shock, fire
and/or serious injury.
While reading the operating instructions, unfold the graphics
page for the machine and leave it open.
Intended Use
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.
Product Features
The numbering of the product features refers to the illustration of the machine on the graphics page.
1 Spindle lock button
2 On/Off switch
3 Auxiliary handle (insulated gripping surface)
4 Grinder spindle
5 Protection guard for grinding
6 Locking screw for protection guard
7 Mounting flange with O-ring
8 Grinding wheel*
9 Clamping nut
10 Two-pin spanner for clamping nut*
11 Quick-clamping nut
12 Carbide grinding head*
13 Protection guard for cutting*
14 Cutting disc*
15 Grinding cup*
16 Two-pin spanner, offset, for grinding cup*
17 Hand guard*
18 Spacer discs*
19 Rubber sanding plate*
20 Sanding sheet*
21 Round nut*
22 Cup brush*
23 Cutting guide with dust extraction protection guard *
24 Diamond cutting disc*
25 Handle (insulated gripping surface)
*Accessories shown or described are not part of the standard delivery scope of the product. A complete overview of accessories
can be found in our accessories program.
Bosch Power Tools Page 19 Thursday, September 29, 2016 3:35 PM
English | 19
Noise/Vibration Information
Sound emission values determined according to
EN 60745-2-3.
Typically the A-weighted noise levels of the product are:
Sound pressure level 93 dB(A); Sound power level
104 dB(A). Uncertainty K =3 dB.
Wear hearing protection!
Vibration total values ah (triax vector sum) and uncertainty K
determined according to EN 60745-2-3:
Surface grinding: ah =7.5 m/s2, K =1.5 m/s2,
Disk sanding: ah =4.5 m/s2, K =1.5 m/s2.
The vibration level given in this information sheet has been
measured in accordance with a standardised test given in
EN 60745 and may be used to compare one tool with another. It may be used for a preliminary assessment of exposure.
The declared vibration emission level represents the main applications of the tool. However if the tool is used for different
applications, with different accessories or insertion tools or is
poorly maintained, the vibration emission may differ. This
may significantly increase the exposure level over the total
working period.
An estimation of the level of exposure to vibration should also
take into account the times when the tool is switched off or
when it is running but not actually doing the job. This may significantly reduce the exposure level over the total working
Identify additional safety measures to protect the operator
from the effects of vibration such as: maintain the tool and the
accessories, keep the hands warm, organisation of work patterns.
Technical Data
Angle Grinder
GWS ...
Article number
Rated power input
Output power
Rated speed
Grinding disc diameter, max.
Thread of grinder spindle
Thread length (max.) of grinder spindle
Restarting Protection
Reduced starting current
Weight according to EPTA-Procedure 01:2014
– with vibration-damping auxiliary handle
– with standard-auxiliary handle
Protection class
Angle Grinder
Article number
Rated power input
Output power
Rated speed
Grinding disc diameter, max.
Thread of grinder spindle
Thread length (max.) of grinder spindle
Restarting Protection
Reduced starting current
Weight according to EPTA-Procedure 01:2014
– with vibration-damping auxiliary handle
– with standard-auxiliary handle
Protection class
H81 L..
M 14
H81 M..
M 14
H82 L..
M 14
H82 M..
M 14
H83 M..
M 14
H84 L..
M 14
H84 M..
M 14
H55 M..
M 14
H56 M..
M 14
3 601 ...
GWS ...
3 601 ...
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.
Only for power tools without reduced starting current: Starting cycles generate brief voltage drops. Interference with other equipment/machines may
occur in case of unfavourable mains system conditions. Malfunctions are not to be expected for system impedances below 0.25 ohm.
Bosch Power Tools
1 609 92A 2C8 | (29.9.16) Page 20 Thursday, September 29, 2016 3:35 PM
20 | English
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
service agent for maintenance. For addresses, see section
“After-sales Service and Application Service”.
Protection Guard for Grinding
Place the protection guard 5 on the spindle collar. Adjust the
position of the protection guard 5 to the requirements of the
operation and lock the protection guard 5 with the locking
screw 6.
 Adjust the protection guard 5 in such a manner that
sparking is prevented in the direction of the operator.
Protection Guard for Cutting
 For cutting with bonded abrasives, always use the protection guard for cutting 13.
 Provide for sufficient dust extraction when cutting
The protection guard for cutting 13 is mounted in the same
manner as the protection guard for grinding 5.
Cutting Guide with Dust Extraction Protection Guard
The cutting guide with dust extraction protection guard 23 is
mounted in the same manner as the protection guard for
grinding 5.
Auxiliary Handle
 Operate your machine only with the auxiliary handle 3.
Screw the auxiliary handle 3 on the right or left of the machine
head depending on the working method.
Hand Guard
 For operations with the rubber sanding plate 19 or with
the cup brush/wheel brush/flap disc, always mount the
hand guard 17.
The hand guard 17 is fastened with the auxiliary handle 3.
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 4 and all parts to be mounted.
For clamping and loosening the grinding tools, lock the grinder 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 become damaged.
1 609 92A 2C8 | (29.9.16)
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 direction-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
9 and tighten with the two-pin spanner; see Section “Quickclamping 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 other parts.
A plastic part (O-ring) is fitted around
the centring collar of mounting flange 7.
If the O-ring is missing or damaged,
the mounting flange 7 must be replaced
before resuming operation.
Flap Disc
 For operations with the flap disc, always mount the
hand guard 17.
Rubber Sanding Plate
 For operations with the rubber sanding plate 19, always mount the hand guard 17.
See graphics page for the mounting sequence.
Before mounting the rubber sanding plate 19, put the 2 spacer discs 18 onto the grinder spindle 4.
Screw on the round nut 21 and tighten with the two-pin spanner.
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. Tighten the cup brush/disc brush with an open-end spanner.
Grinding Cup
See graphics page for the mounting sequence.
Screw on clamping nut 9 and tighten with two-pin spanner
Bosch Power Tools Page 21 Thursday, September 29, 2016 3:35 PM
English | 21
Quick-clamping Nut
For convenient changing of grinding tools without the use of
additional tools, you can use the quick-clamping nut 11 instead of the clamping nut 9.
 The quick-clamping nut 11 may be used only for grinding or cutting discs.
Use only a flawless, undamaged quick-clamping nut 11.
When screwing on, pay attention that the side of the
quick-clamping nut 11 with printing does not face the
grinding disc; the arrow must point to the index mark 26.
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 attached, undamaged quick-clamping nut can
be loosened by hand when
turning the knurled ring in
anticlockwise direction.
Never loosen a tight quickclamping nut with pliers.
Always use the two-pin
spanner. Insert the two-pin
spanner as shown in the
Approved Grinding Tools
All grinding tools mentioned in these operating instructions
can be used.
The permissible speed [min-1] or the circumferential speed
[m/s] of the grinding tools used must at least match the values
given in the table.
Therefore, observe the permissible rotational/circumferential speed on the label of the grinding tool.
Bosch Power Tools
M 14
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 manner,
the On/Off switch can be
brought into a more convenient position for special working situations,
e. g., for cutting operations using the cutting
guide with dust extraction protection guard 23 or for left-handed persons.
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.
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 carcinogenic, especially in connection with wood-treatment
additives (chromate, wood preservative). Materials containing asbestos may only be worked by specialists.
– As far as possible, use a dust extraction system suitable
for the material.
– 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
easily ignite.
[min ]
Starting Operation
 Observe correct mains voltage! The voltage of the power 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.
1 609 92A 2C8 | (29.9.16) Page 22 Thursday, September 29, 2016 3:35 PM
22 | English
When operating the machine with power from mobile generators 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 frequency.
Switching On and Off
To start the power tool, press the On/Off switch 2 forward
and then down.
To lock-on the pressed On/Off switch 2, push the On/Off
switch 2 further forward.
To switch off the power tool, release the On/Off switch 2, or
when it is locked, briefly press the On/Off switch 2 and then
release it.
To save energy, only switch the power tool on when using it.
Switch Version without Lock-on (country-specific):
To start the power tool, press the On/Off switch 2 forward
and then down.
To switch off the machine, release the On/Off switch 2.
 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 grinding tools. Damaged grinding tools can burst and cause injuries.
Restarting Protection
(GWS 22-180 JH/GWS 22-230 JH/GWS 24-180 JH/
GWS 24-230 JH/GWS 26-180 JH/GWS 26-230 JH)
The restarting protection feature prevents uncontrolled restarting of the machine after an interruption in the power supply.
To restart the operation, switch the On/Off switch 2 to the
Off position and start the machine again.
Reduced starting current
(GWS 22-180 JH/GWS 22-230 JH/GWS 24-180 JH/
GWS 24-230 JH/GWS 26-180 JH/GWS 26-230 JH)
The electronic reduced starting current limits the power consumption when switching the tool on and enables operation
from a 13 ampere fuse.
Note: When the machine runs at full speed immediately after
switching on, the reduced starting current and the restarting
protection have failed. The power tool should be sent immediately to an after-sales service (for addresses, see section
“After-sales Service and Application Service”).
 After heavily straining the power tool, continue to run
it at no-load for several minutes to cool down the accessory.
 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.
Note: When not using for extended periods, pull the mains
plug out of the socket outlet. When the mains plug is inserted
and mains voltage is given, the power tool, even when
switched off, still consumes a low amount of current.
Rough Grinding
 Never use a cutting disc for roughing.
The best roughing results are achieved when setting the machine 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
are formed.
Flap Disc
With the flap disc (accessory), curved surfaces and profiles
can be worked.
Flap discs have a considerably higher service life, lower noise
levels and lower sanding temperatures than conventional
sanding sheets.
Cutting Metal
 For cutting with bonded abrasives, always use the protection guard for cutting 13.
When cutting, work with moderate feed, adapted to the material 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 applying sideward pressure.
The machine must always work in an upgrinding motion. Otherwise, the danger exists
of it being pushed uncontrolled out of the
Working Advice
When cutting profiles and square bar, it is best to start at the
smallest cross section.
 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
Cutting Stone
 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.
1 609 92A 2C8 | (29.9.16)
Bosch Power Tools Page 23 Thursday, September 29, 2016 3:35 PM
English | 23
When using the cutting guide with dust extraction protection
guard 23, the vacuum cleaner must be approved for vacuuming masonry dust. Suitable vacuum cleaners are available
from Bosch.
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 material 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 circular sparking, rotating with the diamond cutting disc.
In this case, interrupt the cutting process and allow the diamond 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 circumstances. 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 interior 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 order to avoid a safety hazard.
Bosch Power Tools
After-sales Service and Application Service
Our after-sales service responds to your questions concerning maintenance and repair of your product as well as spare
parts. Exploded views and information on spare parts can also be found under:
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
the product.
Great Britain
Robert Bosch Ltd. (B.S.C.)
P.O. Box 98
Broadwater Park
North Orbital Road
UB 9 5HJ
At you can order spare parts or arrange
the collection of a product in need of servicing or repair.
Tel. Service: (0344) 7360109
Origo Ltd.
Unit 23 Magna Drive
Magna Business Park
City West
Dublin 24
Tel. Service: (01) 4666700
Fax: (01) 4666888
Australia, New Zealand and Pacific Islands
Robert Bosch Australia Pty. Ltd.
Power Tools
Locked Bag 66
Clayton South VIC 3169
Customer Contact Center
Inside Australia:
Phone: (01300) 307044
Fax: (01300) 307045
Inside New Zealand:
Phone: (0800) 543353
Fax: (0800) 428570
Outside AU and NZ:
Phone: +61 3 95415555
Republic of South Africa
Customer service
Hotline: (011) 6519600
Gauteng – BSC Service Centre
35 Roper Street, New Centre
Tel.: (011) 4939375
Fax: (011) 4930126
1 609 92A 2C8 | (29.9.16) Page 292 Thursday, September 29, 2016 3:35 PM
292 |
1 609 92A 2C8 | (29.9.16)
Bosch Power Tools Page 293 Thursday, September 29, 2016 3:35 PM
| 293
1 605 703 099
1 605 703 099
1 603 340 031
1 603 340 040
1 607 950 043
1 603 340 040
2 602 025 181
1 607 950 004
1 601 329 013
1 607 000 247
Ø 180 mm 2 605 510 297
Ø 230 mm 2 605 510 298
Ø 180 mm 2 605 510 299
Ø 230 mm 2 605 510 300
1 600 793 007
Ø 180 mm 1 605 510 179
Ø 230 mm 1 605 510 180
Bosch Power Tools
2 605 438 197
1 609 92A 2C8 | (29.9.16)