all times. This enables better control of the power tool in  unexpected situations.  Dress properly. Do not wear loose clothing or jewel-

12 | English 
1 609 92A 0B9 | (31.7.13)
Bosch Power Tools
 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.
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 
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.
 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-
trol.
 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 
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 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 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 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 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, 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-
tions.
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.
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 English | 13
Bosch Power Tools
1 609 92A 0B9 | (31.7.13)
 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. 
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. Cor-
ners, 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.
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 
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 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 
you.
 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 
can cause kickback.
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 and Working 
Instructions
 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.
 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.
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14 | English 
1 609 92A 0B9 | (31.7.13)
Bosch Power Tools
 Dusts from materials such as lead-containing coatings, 
some wood types, minerals and metal can be harmful to 
one’s health and cause allergic reactions, lead to res-
piratory infections and/or cancer. Materials containing 
asbestos may only be worked by specialists.
– As far as possible, use a dust extraction system suita-
ble 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. Dusts can 
easily ignite.
 Secure the workpiece. A workpiece clamped with clamp-
ing devices or in a vice is held more secure than by hand.
 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 address-
es, see section “After-sales Service and Application Ser-
vice”.
 Adjust protection guard in such a manner that sparking 
toward the operator is prevented.
 The tightening tension of the clamp from the protection 
guard can be changed by loosening or tightening the ad-
justment screw . Ensure that the protection guard is tightly 
seated and check regularly.
 Do not touch grinding and cutting discs before they 
have cooled down. The discs can become very hot while 
working.
 Actuate the spindle lock button only when the grinder 
spindle is at a standstill. Otherwise, the machine may be-
come damaged.
 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-
er parts.
 When operating the machine with power from mobile gen-
erators, loss of performance or untypical behavior can oc-
cur upon switching on.
 When the machine only runs with strongly reduced speed, 
the kickback stop has failed. When the machine runs at full 
speed immediately after switching on, the reduced start-
ing current, the restarting protection and the kickback 
stop have failed. The power tool should be sent immediate-
ly to an after-sales service for addresses, see section “Af-
ter-sales Service and Application Service”.
 In case of short energy-containing pulses in the supply sys-
tem, which typically develop when lightning strikes, the 
power tool’s kickback stop may actuate. If so, the machine 
will switch off, yet can be restarted again thereafter imme-
diately.
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.
 By applying too high application force, the machine can 
be subject to overload. Overload can lead to overheat-
ing and damage of the power tool. After heavily strain-
ing the power tool, continue to run it at no-load for sev-
eral minutes in order to cool it down.
 Do not use the power tool with a cut-off stand.
 Never use a cutting disc for roughing.
 The quick-clamping nut may be used only for grinding 
or cutting discs. Use only a flawless, undamaged quick-
clamping nut.
 When the damping element between main handle and 
motor housing is damaged, do not continue to use the 
power tool.
 Do not continue to use the power tool when the auxilia-
ry handle is damaged. Do not make any changes or 
modifications to the auxiliary handle.
 When rotating the main handle, always turn it through 
until it engages – see figure 9, page 256.
 To save energy, only switch the power tool on when using 
it.
Products sold in GB only: Your product is fitted with an 
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 author-
ised 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 sock-
et elsewhere.
Products sold in AUS and NZ only: Use a residual current de-
vice (RCD) with a rated residual current of 30 mA or less.
Symbols
The following symbols are important for reading and under-
standing the operating instructions. Please take note of the 
symbols and their meaning. The correct interpretation of the 
symbols will help you to use the machine in a better and safer 
manner.
Symbol
Meaning
Article number
Read all safety warnings and all instruc-
tions
Before any work on the machine itself, 
pull the mains plug from the socket out-
let
Wear protective gloves
OBJ_BUCH-1528-002.book  Page 14  Wednesday, July 31, 2013  10:38 AM

 English | 15
Bosch Power Tools
1 609 92A 0B9 | (31.7.13)
Delivery Scope
Angle grinder, protection guard, auxiliary handle.
Special protection guards, application tools and other acces-
sories shown or described are not part of the standard deliv-
ery scope.
A complete overview of accessories can be found in our ac-
cessories program.
Intended Use
The machine is intended for roughing metal, stone and ceram-
ic materials.
For cutting with bonded abrasives, a special cutting guard 
(accessory) must be used.
When cutting in stone, provide for sufficient dust extraction.
Together with the hand guard (accessory), the machine can 
be used for brushing and grinding/sanding with elastic sand-
ing plates.
The machine is suitable only for working without water.
Technical Data
The technical data of the machine are listed in the table on 
page 246.
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.
Please observe the article number on the type plate of your 
machine. The trade names of the individual machines may 
vary.
Declaration of Conformity
We declare under our sole responsibility that the product de-
scribed under “Technical Data” is in conformity with the fol-
lowing standards or standardization documents: EN 60745 
according to the provisions of the directives 2011/65/EU, 
2004/108/EC, 2006/42/EC.
Technical file (2006/42/EC) at:
Robert Bosch GmbH, PT/ETM9,
D-70745 Leinfelden-Echterdingen
Always wear ear protection.
Wear safety glasses/goggles
Movement direction
Apply strength for the workstep.
Switching On
Switching Off
On/Off switch lock-on
Releasing the lock-on function of the 
On/Off switch
Prohibited action
Permitted action
Next step of action
P
1
Rated power input
P
2
Output power
n
Rated speed
l = Grinder spindle length
d
1
 = Grinder spindle diameter
D = Max. grinding disc diameter
d
2
 = Inner disc diameter
Kickback stop
Restarting Protection
Reduced starting current
Additional information
Surface grinding
Grinding/sanding with sanding sheet
Symbol
Meaning
d
1
l
d
2
D
 
Weight according to EPTA-Procedure 
01/2003 with vibration-damping auxil-
iary handle
Weight according to EPTA-Procedure 
01/2003 with standard-auxiliary handle
/
II
Symbol for protection class 
II 
(completely insulated)
L
wA
Sound power level
L
pA
Sound pressure level
K
Uncertainty
a
h
Vibration total value

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