WARNING OBJ_BUCH-1048-004.book  Page 10  Monday, December 14, 2015  11:18 AM  English | 11

 English | 11
Bosch Power Tools
1 609 92A 1FD | (14.12.15)
Safety Warnings for Die Grinders
Safety Warnings common for Grinding and Sanding

This power tool is intended to function as a grinder and 
sander. Read all safety warnings, instructions, illustra-
tions and specifications provided with this power tool. 
Failure to follow all instructions listed below may result in 
electric shock, fire and/or serious injury.

Operations such as wire brushing, polishing or cutting-
off 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 grinding accessories must be at 
least equal to the maximum speed marked on the pow-
er tool. Grinding accessories running faster than their rat-
ed 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 
controlled.

The arbour size of wheels, sanding drums or any other 
accessory must properly fit the spindle or collet of the 
power tool.  Accessories that do not match the mounting 
hardware of the power tool will run out of balance, vibrate 
excessively and may cause loss of control.

Mandrel-mounted wheels, sanding drums, cutters or 
other accessories must be inserted fully into the collet 
or chuck. If the mandrel is insufficiently held and/or the 
overhang of the wheel is too long, the mounted wheel may 
become loose and be ejected at high velocity.

Do not use a damaged accessory. Before each use in-
spect the accessory such as abrasive wheels for chips 
and cracks, sanding drum 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 
this test time.

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 
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 power tool only by the 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 ex-
posed metal parts of the power tool “live” and could give 
the operator an electric shock.

Always hold the tool firmly in your hand(s) during the 
start-up. The reaction torque of the motor, as it acceler-
ates to full speed, can cause the tool to twist.

Use clamps to support workpiece whenever practical. 
Never hold a small workpiece in one hand and the tool 
in the other hand while in use. Clamping a small work-
piece allows you to use your hand(s) to control the tool. 
Round material such as dowel rods, pipes or tubing have a 
tendency to roll while being cut, and may cause the bit to 
bind or jump toward you.

Position the cord clear of the spinning accessory. If you 
lose control of the power tool, the cord may be cut or 
snagged and your hand or arm may be pulled into the spin-
ning accessory.

Never lay the power tool down until the accessory has 
come to a complete stop. The spinning accessory may 
grab the surface and pull the power tool out of your control.

After changing the bits or making any adjustments, 
make sure the collet nut, chuck or any other adjust-
ment devices are securely tightened. Loose adjustment 
devices can unexpectedly shift, causing loss of control, 
loose rotating components will be violently thrown.

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 ac-
cumulation of powdered metal may cause electrical haz-
ards.

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-
tion or shock.
Kickback and related warnings

Kickback is a sudden reaction to a pinched or snagged ro-
tating wheel, sanding band, 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.
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-
tions.
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12 | English 
1 609 92A 1FD | (14.12.15)
Bosch Power Tools
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. 
The operator can control kickback forces, if proper precau-
tions are taken.

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.

Do not use a toothed saw blade. Such blades create fre-
quent kickback and loss of control over the power tool.

Always feed the bit into the material in the same direc-
tion as the cutting edge is exiting from the material 
(which is the same direction as the chips are thrown). 
Feeding the tool in the wrong direction causes the cutting 
edge of the bit to climb out of the work and pull the tool in 
the direction of this feed.

When using rotary files, always have the work securely 
clamped. These wheels will grab if they become slightly 
canted in the groove, and can kickback. When a cut-off 
wheel grabs, the wheel itself usually breaks. When the ro-
tary file grabs, it may jump from the groove and you could 
lose control of the tool.
Additional safety instructions for grinding operations
Safety warnings specific for grinding operations

Use only wheel types that are recommended for your 
power tool and only for recommended applications. 
For example: do not grind with the side of a cut-off 
wheel. Abrasive cut-off wheels are intended for peripheral 
grinding, side forces applied to these wheels may cause 
them to shatter.

For threaded abrasive cones and plugs use only undam-
aged wheel mandrels with an unrelieved shoulder 
flange that are of correct size and length. Proper man-
drels will reduce the possibility of breakage.

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 snagging of the wheel in the cut and 
the possibility of kickback or wheel breakage.

Do not position your hand in line with and behind the 
rotating wheel. When the wheel, at the point of operation, 
is moving away from your hand, the possible kickback may 
propel the spinning wheel and the power tool directly at 
you.

When wheel is pinched, snagged 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 other-
wise kickback may occur. Investigate and take corrective 
action to eliminate the cause of wheel pinching or snag-
ging.

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.

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.
Product Description and Specifica-
tions
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.
While reading the operating instructions, unfold the graphics 
page for the machine and leave it open.
Intended Use
The machine is designed for grinding and deburring metal us-
ing corundum grinding tools, as well as for working with sand-
ing wheels.
Product Features
The numbering of the product features refers to the illustra-
tion of the machine on the graphics page.
1 Collet
2 Grinder spindle
3 Spindle collar
4 On/Off switch
5 Handle (insulated gripping surface)
6 Open-end spanner, size 14 mm*
7 Open-end spanner, size 22 mm*
8 Inner shank dimension L
0
*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.
OBJ_BUCH-1048-004.book  Page 12  Monday, December 14, 2015  11:18 AM

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Bosch Power Tools
1 609 92A 1FD | (14.12.15)
Technical Data
Noise/Vibration Information
Sound emission values determined according to 
EN 60745-2-23.
Typically the A-weighted noise levels of the product are: 
Sound pressure level 88 dB(A); Sound power level 99 dB(A). 
Uncertainty K =3 dB.
Wear hearing protection!
Vibration total values a
h
 (triax vector sum) and uncertainty K 
determined according to EN 60745-2-23: 
Surface grinding (roughing): a
h
=7.5 m/s
2
, K=1.5 m/s
2
.
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 anoth-
er. It may be used for a preliminary assessment of exposure.
The declared vibration emission level represents the main ap-
plications 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 sig-
nificantly 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 pat-
terns.
Declaration of Conformity
We declare under our sole responsibility that the product de-
scribed under “Technical Data” is in conformity with all rele-
vant 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 60745-2-23, EN 50581.
Technical file (2006/42/EC) at:
Robert Bosch GmbH, PT/ETM9,
70764 Leinfelden-Echterdingen, GERMANY
Robert Bosch GmbH, Power Tools Division
70764 Leinfelden-Echterdingen, GERMANY
Leinfelden, 14.12.2015
Assembly

Before any work on the machine itself, pull the mains 
plug.
Mounting the Grinding Tools (see figure A)
– Clean the grinder spindle 
2 and all parts to be mounted.
– Hold the grinder spindle 
2 on the spanner surfaces with the 
open-end spanner 
7 (size 22 mm).
– Loosen the collet 
1 with the open-end spanner 6 (width 
across flats of 14 mm) by turning it counterclockwise.
– Insert the clamping shaft of the grinding tool to the stop in-
to the collet chuck 
1.
– Tighten the collet 
1 with the open-end spanner 6 (width 
across flats of 14 mm) by turning it clockwise.
The grinding tools must run completely concentrically. Do not 
continue to use damaged grinding tools that are out of bal-
ance. If the grinding tools are out of balance they should be re-
placed. Treat with a whetstone (accessory) or change.
Using a whetstone, any particular special shape can be pro-
duced out of the basic forms of the grinding accessory.

Do not tighten the collet chuck as long as no grinding 
accessory is mounted. Otherwise, the collet chuck can 
become damaged.

Only use grinding points with a matching shank diame-
ter. A grinding point/accessory with a shank diameter that 
does not fit the tool holder (see “Technical Data”), can not 
be clamped properly and will damage the collet chuck.

The application tool must be clamped at least 10 mm. 
The inner shank dimension L
0
 can be used to calculate the 
maximum permitted speed of the application tool from the 
specifications provided by manufacturer of the application 
tool. It must not be less than the maximum speed of the 
power tool.
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.
Die grinder
GGS 18 H
Article number
3 601 B09 2..
Rated power input
W
1050
Output power
W
500
Rated speed
min
-1
18000
Collet chuck diameter, max.
mm
10
Spindle collar dia.
mm
43
Grinding tool diameter, max.
mm
55
max. grinding accessory diameter
mm
80
Weight according to 
EPTA-Procedure 01:2014
kg
3.0
Protection class
/II
The values given are valid for a nominal voltage [U] of 230 V. For differ-
ent voltages and models for specific countries, these values can vary.
Henk Becker
Executive Vice President
Engineering
Helmut Heinzelmann
Head of Product Certification
PT/ETM9
OBJ_BUCH-1048-004.book  Page 13  Monday, December 14, 2015  11:18 AM

14 | English 
1 609 92A 1FD | (14.12.15)
Bosch Power Tools
– 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.
Operation
Starting Operation

Observe the mains voltage! The voltage of the power 
source must correspond with the data on the type plate 
of the machine.
Switching On and Off
To start the power tool, first slide the On/Off switch 4 for-
ward, 
then press it and keep it pressed.
To 
lock-on the pressed On/Off switch 4, push the On/Off 
switch 
4 further forward.
To 
switch off the power tool, release the On/Off switch 4, or 
when it is locked, briefly press the On/Off switch 
4 and then 
release 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-
juries.
To save energy, only switch the power tool on when using it.
Working Advice
Optimum grinding results are achieved when the grinding tool 
is moved uniformly back and forth with light pressure. Pres-
sure that is too strong reduces the performance capability of 
the machine and causes the grinding tool to wear more quick-
ly.

Protect the abrasive wheels from impacts.
Maintenance and Service
Maintenance and Cleaning

Before any work on the machine itself, pull the mains 
plug.

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-
so be found under:
www.bosch-pt.com
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
Denham
Uxbridge
UB 9 5HJ
At www.bosch-pt.co.uk you can order spare parts or arrange 
the collection of a product in need of servicing or repair. 
Tel. Service: (0344) 7360109
E-Mail: boschservicecentre@bosch.com
Ireland
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
www.bosch.com.au
Republic of South Africa
Customer service
Hotline: (011) 6519600

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