Bosch GWS Professional 15-125 CIH, GWS Professional 15-125 CIEH, GWS Professional 15-125 CITH, GWS Professional 15-125 CISTH, GWS Professional 15-150 CIH Original Instructions Manual

Robert Bosch GmbH

Power Tools Division
70764 Leinfelden-Echterdingen
GERMANY

www.bosch-pt.com

1 609 92A 16W (2015.02) PS / 322 EURO

GWS Professional

15-125 CIH | 15-125 CIEH | 15-125 CITH | 15-125 CISTH | 15-150 CIH

de Originalbetriebsanleitung
en Original instructions
fr Notice originale
es Manual original
pt Manual original
it Istruzioni originali
nl Oorspronkelijke

gebruiksaanwijzing

da Original brugsanvisning
sv Bruksanvisning i original
no Original driftsinstruks
fi Alkuperäiset ohjeet
el Πρωτότυπο οδηγιών χρήσης

tr Orijinal işletme talimatı
pl Instrukcja oryginalna
cs Původní návod k používání
sk Pôvodný návod na použitie
hu Eredeti használati utasítás
ru Оригинальное руководство по

эксплуатации

uk Оригінальна інструкція з

експлуатації

kk Пайдалану нұсқаулығының

түпнұсқасы

ro Instrucţiuni originale
bg Оригинална инструкция

mk Оригинално упатство за работа
sr Originalno uputstvo za rad
sl Izvirna navodila
hr Originaln e upute za rad
et Algupärane kasutusjuhend
lv Instrukcija s oriģinālvalodā
lt Originali instrukcija
ar
fa

ςТЎϩХʉ ЌТϾϦφЍʉ ʌμВТЎϺυ

ΖЎϩʉ ˒μВЖЙʉʓ ИͳϞφЁʑ

OBJ_BUCH-165-007.book Page 1 Thursday, February 12, 2015 10:55 AM

1 609 92A 16W | (12.2.15) Bosch Power Tools

5 | 4 |

1 609 92A 16W | (12.2.15) Bosch Power Tools

GWS 15-125 CIEH
GWS 15-125 CITH

17

18

19

16 16

7

8

9

10

11

13 15

8 8

12

10

11

10

11

14

10

11

22

8

21

20

2

5

1

4

23

24

5

3

6

OBJ_BUCH-165-007.book Page 4 Thursday, February 12, 2015 10:55 AM

OBJ_BUCH-165-007.book Page 16 Thursday, February 12, 2015 10:55 AM

16 | English

 Prevent unintentional starting. Ensure the switch is in

English

Safety Notes

General Power Tool Safety Warnings

WARNING

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

Save all warnings and instructions for future reference.

The term “power tool” in the warnings refers to your mains­operated (corded) power tool or batte ry-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
shock.

 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.

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 op-

erating power tools may result in serious personal injury.



Use personal protective equipment. Always wear eye
protection.

non-skid safety shoes, hard hat, or hearing protection used
for appropriate conditions will reduce personal injuries.

Read all safety warnings and all in­structions. Failure to follow the warnings

Protective equipment such as dust mask,

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 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 con­nected 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
tools.

 Keep cutting tools sharp and clean. Properly maintained

cutting tools with sharp cuttin g 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.

Service
 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.

1 609 92A 16W | (12.2.15) Bosch Power Tools

OBJ_BUCH-165-007.book Page 17 Thursday, February 12, 2015 10:55 AM

English | 17

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 instruc-

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

 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
and fly apart.

 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.



Thr eaded mount ing of acce ssories 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.

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 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 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 shop apron capable of stopping
small abrasive or workpiece fragments. The eye protec-

tion must be capable of stopping flying debris generated
by various operations. The dust mask or respirator must be
capable of filtrating pa rticles generated by your operation.
Prolonged exposure to high intensity noise may cause
hearing loss.

 Keep bystanders a safe distance away fr om 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.

Accessories that do not match the

 Hold the power tool by insulated gripping surfaces on-

ly, when performing an operation where the cutting ac­cessory 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 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.

 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 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 electrocu­tion or shock.

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 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. 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
point of snagging.

 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.

Bosch Power Tools 1 609 9 2A 16W | (12.2.15)

OBJ_BUCH-165-007.book Page 18 Thursday, February 12, 2015 10:55 AM

18 | English

 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 se­lected 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 frag­ments, 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 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
burst.

Additional safety warnings specific for abrasive cutting
off operations

 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 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 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
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 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 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

whe n the power suppl y is i nterr upte d, e. g ., in case o f a
power failure or when the mains plug is pulled. This pre-

vents uncontrolled restarting.

 Do not touch grinding and cutting discs before they

have cooled down. The discs can become very hot while

working.

 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 sock­et elsewhere.
Products sold in AUS and NZ only: Use a residual current de­vice (RCD) with a rated residual current of 30 mA or less.

1 609 92A 16W | (12.2.15) Bosch Power Tools

OBJ_BUCH-165-007.book Page 19 Thursday, February 12, 2015 10:55 AM

English | 19

Product Description and Specifica­tions

Read all safety warnings and all instruc­tions. Failure to follow the warnings and in-

structions 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 Release lever for protection guard
2 Spindle lock button
3 Thumbwheel for speed preselection

(GWS 15-125 CIEH/GWS 15-125 CITH)

4 On/Off switch
5 Auxiliary handle (insulated gripping surface)
6 Grinder spindle
7 Extraction hood for sanding *
8 Mounting flange with O-ring

9 Carbide grinding head *
10 Clamping nut
11 Quick-clamping nut *
12 Protection guard for grinding
13 Grinding wheel *
14 Protection guard for cutting*
15 Cutting disc *
16 Hand guard *
17 Rubber sanding plate *
18 Sanding sheet *
19 Round nut *
20 Cup brush *
21 Cutting guide with dust extraction protection guard *
22 Diamond cutting disc *
23 Handle (insulated gripping surface)
24 Direction-of-rotation arrow for grinding spindle

*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.

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 91 dB(A); Sound power level
102 dB(A). Uncertainty K =3 dB.

Wear hearing protection!

Vibration total values a

(triax vector sum) and uncertainty K

h

determined according to EN 60745-2-3:
Surface grinding: a
Disk sanding: a

=9m/s2, K=1.5 m/s2,

h

=5m/s2, K=1.5 m/s2.

h

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
period.
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.

Declaration of Conformity

We declare under our sole responsibility that the product de­scribed under “Technical Data” is in conformity with all rele­vant provisions of the directives 2011/65/EU, until
19 April 2016: 2004/108/EC, from 20 April 2016 on:
2014/30/EU, 2006/42/EC including their amendments and
complies with the following standards:
EN 60745-1, EN 60745-2-3.

Technical file (2006/42/EC) at:
Robert Bosch GmbH, PT/ETM9,
70764 Leinfelden-Echterdingen, GERMANY

Henk Becker
Executive Vice President
Engineering

Robert Bosch GmbH, Power Tools Division
70764 Leinfelden-Echterdingen, GERMANY
Leinfelden, 16.02.2015

Helmut Heinzelmann
Head of Product Certification
PT/ETM9

Bosch Power Tools 1 609 9 2A 16W | (12.2.15)

OBJ_BUCH-165-007.book Page 20 Thursday, February 12, 2015 10:55 AM

20 | English

Technical Data

Angle Grinder GWS ... 15-125 CIH 15-125 CIEH 15-125 CITH 15-125 CISTH 15-150 CIH

Article number

Rated power input W 1500 1500 1500 1500 1500
Output power
Rated speed
Speed control adjustment
Grinding disc diameter, max.
Thread of grinder spindle
Thread length (max.) of grinder

spindle
Kickback stop
Restarting Protection
Reduced starting current
Constant electronic control
Speed preselection
Weight according to

EPTA-Procedure 01/2003
– with vibration-damping

auxiliary handle

– with standard-auxiliary handle
Protection class /II /II /II / II /II

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

3 601 ... H30 2..

H30 C..

H30 3..
H30 D..

H30 4..
H30 E..

H30 7..
H30 G..

W 860 860 860 860 860

-1

min
min

-1

11000 11000 9300 7500 9300

– 2800–11000 2800–9300 ––

mm 125 125 125 125 150

M 14 M 14 M 14 M 14 M 14

mm 22 22 22 22 22

 

 

 

 

–  ––

kg
kg

2.5

2.4

2.5

2.4

2.5

2.4

2.5

2.4

H30 5..
H30 F..

2.6

2.5

Assembly

Mounting the Protective Devices

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

plug.

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 se r­vice agent for maintenance. For addresses, see section “Af­ter-sales Service and Application Service”.

Protection Guard for Grinding

Place the protection guard 12 on­to the spindle collar as shown in
the illustration. The triangle marks
on the protection guard must cor­respond with the respective
marks on the gear case.

Press the protection guard 12 on­to the spindle collar until the
shoulder of the protection guard
is seated against the flange of the
machine, and turn the protection
guard until it can clearly be heard
to engage.

Adjust the position of the protection guard 12 to the require­ments of the work process. For this, press the release lever 1
upward and turn the protection guard 12 to the required po­sition.

 Adjust the protection guard 12 in such a manner that

sparking is prevented in the direction of the operator.

 The protection guard 12 may be turned only upon actu-

ation of the release lever 1! Otherwise the power tool
may not continue to be used under any circumstances
and must be taken to an after-sales service agent.

Note: The encoding keys on the protection guard 12 ensure

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

Protection Guard for Cutting
 For cutting with bonded abrasives, always use the pro-

tection guard for cutting 14.

 Provide for sufficient dust extraction when cutting

stone.

The protection guard for cutting 14 is mounted in the same
manner as the protection guard for grinding 12.

Cutting Guide with Dust Extraction Protection Guard

The cutting guide with dust extraction protection guard 21 is
mounted in the same manner as the protection guard for
grinding 12.

Extraction Hood for Sanding

The extraction hood 7 can be used for low-dust sanding of
paint, varnish and plastics in conjunction with the carbide
grinding head 9 or the rubber sanding plate 17 with a sanding
sheet 18. The extraction hood 7 is not suitable for working
metals.

1 609 92A 16W | (12.2.15) Bosch Power Tools