Hilti AG 125-13S User manual

AG 125-13S
English 1
Dansk 19
Svenska 37
Norsk 55
Suomi 73
Eesti 91
Latviešu 109
Lietuvių 128
Русский 147
Українська 168
Қазақ 189
Türkçe 209
ﻋﺮﺑﻲ 227
日本語 246
한국어 264
繁體中文 280
中文 295

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AG 125-13S
en Original operating instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
da Originalbrugsanvisning.................................... 19
sv Originalbruksanvisning .................................... 37
no Originalbruksanvisning.................................... 55
fi Alkuperäisetohjeet ....................................... 73
et Algupäranekasutusjuhend ................................. 91
lv Oriģinālā lietošanas instrukcija . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
lt Originali naudojimo instrukcija . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
ru Оригинальное руководство по эксплуатации . . . . . . . . . . . . . . . . . 147
uk Оригінальна інструкція з експлуатації . . . . . . . . . . . . . . . . . . . . . . . 168
kk Түпнұсқа пайдалану бойынша нұсқаулық . . . . . . . . . . . . . . . . . . . . 189
tr Orijinalkullanımkılavuzu.................................. 209
ar ﺩﻟﻴﻞﺍﻻﺳﺘﻌﻤﺎﻝﺍﻷﺻﻠﻲ ................................... 227
ja オリジナル取扱説明書..................................... 246
ko 오리지널사용설명서 ..................................... 264
zh 原始操作說明 ........................................... 280
cn 原版操作说明 ........................................... 295

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English 1
1 Information about the documentation
1.1 About this documentation
• Read this documentation before initial operation or use. This is a prerequisite for safe,
trouble-free handling and use of the product.
• Observe the safety instructions and warnings in this documentation and on the
product.
• Always keep the operating instructions with the product and make sure that the
operating instructions are with the product when it is given to other persons.
1.2 Explanation of symbols used
1.2.1 Warnings
Warnings alert persons to hazards that may occur when handling or using the product.
The following signal words are used in combination with a symbol:
DANGER! Draws attention to an imminent hazard that will lead to serious per-
sonal injury or fatality.
WARNING! Draws attention to a potential hazard that could lead to serious
personal injury or fatality.
CAUTION! Draws attention to a potentially dangerous situation that could lead
to minor personal injury or material damage.
1.2.2 Symbols in the documentation
The following symbols are used in this document:
Read the operating instructions before use
Instructions for use and other useful information
1.2.3 Symbols in the illustrations
The following symbols are used in illustrations:
These numbers refer to the corresponding illustrations found at the beginning of
these operating instructions.
The numbering reflects the sequence of operations shown in the illustrations
and may deviate from the steps described in the text.
Item reference numbers are used in the overview illustration and refer to the
numbers used in the key in the product overview section.
This symbol is intended to draw special attention to certain points when han-
dling the product.
1.3 Product-dependent symbols
1.3.1 Symbols on the product
The following symbols are used on the product:
Wear eye protection.
Revolutions per minute
Revolutions per minute

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Rated speed
Diameter
Protection class II (double-insulated)
1.4 Product information
Hilti products are designed for professional use and may be operated, serviced and
maintained only by trained, authorized personnel. This personnel must be informed of
any particular hazards that may be encountered. The product described and its ancillary
equipment may present hazards when used incorrectly by untrained personnel or when
used not as directed.
The type designation and serial number are printed on the rating plate.
▶Write down the serial number in the table below. Always quote this information when
you contact a Hilti representative or Hilti Service to enquire about the product.
Product information
Angle grinder AG 125-13S
Generation 05
Serial no.
2 Safety
2.1 Safety instructions
2.1.1 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 injury.
Save all warnings and instructions for future reference.
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 or moving parts.
Damaged or entangled cords increase the risk of electric shock.

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▶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, 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.
▶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 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 tools.
▶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.
Service
▶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.

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2.1.2 Safety warnings common for grinding, sanding, wire brushing, polishing 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.
▶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 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.

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▶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.
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 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 the 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 cut-off wheel. Abrasive cut-off wheels are intended for
peripheral grinding, side forces applied to these wheels may cause them to shatter.

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▶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 wheels from larger power tools. Wheel intended for larger
power tool is 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 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.
▶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.
Safety warnings specific for polishing operations:
▶Do not allow any loose portion of the polishing bonnet or its attachment strings
to spin freely. Tuck away or trim any loose attachment strings. Loose and spinning
attachment strings can entangle your fingers or snag on the workpiece.
2.1.3 Additional safety instructions
Personal safety
▶Use the product only when it is in technically faultless condition.
▶Never tamper with or modify the tool in any way.

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▶Always hold the power tool with both hands on the handles provided. Keep the
handles clean and dry.
▶Avoid touching rotating parts – risk of injury!
▶Wear suitable protective glasses, a hard hat, ear protection, protective gloves and
light respiratory protection while using the power tool.
▶Before beginning the work, check the hazard classification of the dust that will be pro-
duced. Use an industrial vacuum cleaner with an officially approved protection class
in compliance with the locally applicable dust protection regulations. Dust from ma-
terials such as lead-based paint, certain types of wood and concrete/masonry/stone
containing quartz, minerals or metal may be harmful to health.
▶Make sure that the workplace is well ventilated and, where necessary, wear a respirator
appropriate for the type of dust generated. Contact with or inhalation of the dust
may cause allergic reactions and/or respiratory or other diseases among operators
or bystanders. Certain kinds of dust are classified as carcinogenic such as oak and
beech dust, especially in conjunction with additives for wood conditioning (chromate,
wood preservative). Material containing asbestos may be handled only by specialists.
▶Take breaks between working and do physical exercises to improve the blood
circulation in your fingers. Exposure to vibration during long periods of work can lead
to disorders of the blood vessels and nervous system in the fingers, hands and wrists.
Electrical safety
▶Before beginning work, check the working area for concealed electric cables or gas
and water pipes. External metal parts of the power tool may give you an electric shock
if you damage an electric cable accidentally.
▶Do not touch the supply cord or extension cord if it is damaged while working.
Disconnect the mains plug from the power outlet. Check the tool’s supply cord at
regular intervals and have it replaced by Hilti Service if damage is found. Check
extension cords at regular intervals and replace them if found to be damaged.
Using and handling power tools with care
▶Do not use cutting discs for grinding.
▶Remove the clamping flange from the arbor before fitting a threaded accessory tool.
▶Tighten the accessory tool and flange securely. If the accessory tool and flange are
not tightened securely, the accessory tool may work loose from the arbor due to the
braking effect of the motor after switching off.
▶Comply with the manufacturer's instructions for handling and storing grinding discs.
3 Description
3.1 Overview of the product 1
@Spindle lockbutton
;On/off switch
=Air vents
%Vibration-absorbing side handle
&Wrench
(Clamping nut
)Kwik lock clamping nut (optional)
+Cutting disc / grinding disc
§Clamping flange with O-ring
/Guard
:Spindle
∙Quick locking system
$Guard release button
£Threaded bushing for handle

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3.2 Intended use
The product described is a hand-held electric angle grinder. It is designed for cutting
and grinding metal and mineral materials, and for brushing, sanding and drilling in tiles,
all without use of water. It may used only for dry cutting / grinding.
The tool may be operated only when connected to a power supply providing a voltage
and frequency in compliance with the information given on its rating plate.
• The power tool may be used for cutting, slitting and grinding mineral materials only
when equipped with the corresponding guard and front cover.
• A dust removal hood together with a suitable Hilti vacuum cleaner must be used for
working on mineral materials such as concrete or stone.
3.3 Items supplied
Angle grinder, side handle, standard guard, front cover, clamping flange, clamping nut,
wrench, operating instructions.
You can find other system products approved for your product at your local Hilti Center
or online at: www.hilti.com
3.4 Starting current limitation
The electronic starting current limiter reduces the starting current drawn by the power
tool and thus prevents the mains fuse blowing. It also allows the power tool to start
smoothly, without a jolt.
3.5 Constant-speed electronics
Electronic speed control keeps running speed almost constant irrespective of whether
the power tool is idling or running under load. Constant running speed helps ensure
maximum efficiency.
3.6 Active Torque Control (ATC)
The electronics detect potential stalling of the disc and prevent further rotation of the
drive spindle by switching off the tool.
If the ACT system has been triggered, restart the tool. Do this by releasing the on/off
switch and then pressing it again.
Note
If the ATC system malfunctions, the power tool will run only at greatly reduced
speed and with greatly reduced torque. Have the tool checked by Hilti Service.
3.7 Restart interlock
The power tool does not restart by itself when the on/off switch is locked in the on-
position and the power returns after an interruption in the electric supply. The on/off
switch must first be released and then pressed again to restart.
3.8 Temperature-dependent device protection
The temperature-dependent motor protection system monitors current input and motor
temperature and thus prevents the power tool overheating.
If the motor is overloaded through application of excessive working pressure, the power
tool’s performance drops noticeably or it may stop completely. A standstill should be
avoided. No specific value can be given for the permissible overloading limit for the
power tool as it depends on motor temperature.

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3.9 Front cover for the disc guard 2
When grinding with straight grinding discs and cutting with cutting discs in
metalworking applications, use the standard guard with front cover.
3.10 DG-EX 125/5" dust hood for grinding (accessory) 3
The grinding system is suitable only for occasional use with diamond cup wheels for
grinding mineral materials.
CAUTION Use of this hood for working on metal is prohibited.
3.11 DC-EX 125/5"M dust hood for grinding (accessory) 4
The power tool may be used for cutting and slitting work on mineral materials only when
fitted with a dust hood.
CAUTION Use of this hood for working on metal is prohibited.
3.12 DC-EX 125/5"C dust hood for cutting (accessory) 5
Use the DC-EX 125/5"C dust hood when cutting masonry and concrete.
CAUTION Use of this hood for working on metal is prohibited.
4 Consumables
Only synthetic resin-bonded, fiber-reinforced discs with a maximum diameter of Ø 125
mm which are approved for use at a rotational speed of at least 11,500/min and a
peripheral speed of 80 m/s may be used.
The maximum grinding disc thickness is 6.4 mm and the maximum cutting disc thickness
is 2.5 mm.
WARNING! When cutting or slitting with cutting discs, always use the standard
guard with additional cover plate.
Discs
Application Designation Material
Abrasive cutting disc Cutting, slitting ACD Metal
Diamond cutting disc Cutting, slitting DC-TP, DC-D
(SPX, SP, P) Mineral
Abrasive grinding disc Rough grinding AGD, AFD,
AND Metal
Diamond grinding disc Rough grinding DG-CW (SPX,
SP, P) Mineral
Wire brushes Wire brushes 3CS, 4CS, 3SS,
4SS Metal
Diamond core bit Drilling in tiles DD-M14 Mineral
Abrasive resin-fiber disc Rough grinding AP-D Metal

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Suitability of discs for the equipment used
Item Equipment ACD AGD,
AFD,
AND
DG-CW
(SPX,
SP, P)
DC-TP,
DC-D
(SPX,
SP, P)
AP-D 3CS,
4CS,
3SS,
4SS,
DD-
M14
A Guard X X X X X X
B Front cover (in
combination with
A)
X — — X — —
C DG-EX 125/5"
dust hood for
grinding
— — X — — —
D DC-EX 125/5"C
dust hood for
cutting (only in
conjunction with
A)
— — — X — —
E DC-EX 125/5"M
dust hood for
slitting
— — — X — —
F DCEX SL
adapter (in
conjunction with
E)
— — — X — —
G Side handle X X X X X X
H DCBG 125 hoop
handle (optional
for G)
XXXXXX
I Clamping nut X X X X — —
J Clamping flange X X X X — —
KKwik lock (op-
tional for I) X — — X — —
L Clamping nut for
abrasive resin-
fiber disc
— — — — X —
M Support plate — — — — X —

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5 Technical data
5.1 Angle grinder
Note
When powered by a generator or transformer, the generator or transformer’s power
output must be at least twice the rated input power shown on the rating plate of the
power tool. The operating voltage of the transformer or generator must always be
within +5% and -15% of the rated voltage of the power tool.
The information given applies to a rated voltage of 230 V. The data may vary in the
event of deviations from the rated voltage and for country-specific versions. Please
refer to the power tool’s type identification plate for details of its voltage, frequency,
current and input power ratings.
AG 125-13S
Rated power input 1,300 W
Rated speed 11,500 /min
Maximum disc diameter 125 mm
Thread diameter M14
Thread length 22 mm
Weight in accordance with EPTA
procedure 01/2003 2.5 kg
5.2 Noise information and vibration values determined in accordance with EN
60745
The sound pressure and vibration values given in these instructions have been measured
in accordance with a standardized test and may be used to compare one power tool with
another. They may be used for a preliminary assessment of exposure.
The data given represents the main applications of the power tool. However, if the
power tool is used for different applications, with different accessory tools or is poorly
maintained, the data may vary. This may significantly increase exposure over the total
working period.
An accurate estimation of exposure should also take into account the times when the
power tool is switched off, or when it is running but not actually being used for a job. This
may significantly reduce exposure over the total working period.
Identify additional safety measures to protect the operator from the effects of noise
and/or vibration, for example: Maintaining the power tool and accessory tools, keeping
the hands warm, organization of work patterns.
Noise emission values determined in accordance with EN 60745-2-3
AG 125-13S
Sound (power) level (LWA)102 dB(A)
Emission sound pressure level
(LpA)91 dB(A)
Uncertainty for the sound pres-
sure level (KpA)3 dB(A)

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Total vibration (vector sum of three directions), measured in accordance with EN
60745-2-3
Other applications, such as cutting, may produce vibration values that deviate from the
given values.
AG 125-13S
Surface grinding with the
vibration-absorbing side handle
(ah,AG)
5.3 m/s²
Surface grinding with the hoop
handle (ah,AG)6.3 m/s²
Sanding (ah,DS)4.0 m/s²
Uncertainty (K) 1.5 m/s²
6 Before use
CAUTION
Risk of injury. The accessory tool may be hot or have sharp edges.
▶Wear protective gloves when fitting, removing or adjusting the accessory tool or
other parts and when troubleshooting.
6.1 Fitting the side handle
▶Screw the side handle into one of the threaded bushings provided.
6.2 Guard
▶Observe the instructions for fitting the applicable guard.
6.2.1 Fitting the guard 6
Note
The keying on the guard ensures that only a guard designed for use with the power
tool can be fitted. The keyed locating lug also prevents the guard from coming into
contact with the tool.
1. Fit the guard onto the drive spindle collar so that the two triangular marks on the guard
and on the power tool are in alignment.
2. Press the guard onto the drive spindle collar.
3. Press the guard release button and then rotate the guard until it engages in the desired
position.
◁The guard release button jumps back.
6.2.2 Adjusting the guard 7
▶Press the guard release button and then rotate the guard until it engages in the desired
position.
6.2.3 Removing the guard
1. Press the guard release button and then rotate the guard until the two triangular marks
on the guard and the power tool are in alignment.
2. Lift off the guard.

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6.3 Fitting or removing the front cover 8
1. Position the front cover with the closed side on the standard guard and push it on
until it engages.
2. To remove it, release the catch for the front cover and then lift the front cover away
from the standard guard.
6.4 Fitting or removing the discs
CAUTION
Risk of injury. The accessory tool may be hot.
▶Wear protective gloves when changing the accessory tool.
Note
Diamond discs must be replaced when their cutting or grinding performance drops
significantly. This generally is the case when the diamond segments reach a height
of less than 2 mm (1/16").
Other discs must be replaced when their cutting performance drops significantly or
other parts of the angle grinder (not the disc) come into contact with the material
you are working on.
Abrasive discs must be replaced when their expiry date has been reached.
6.4.1 Fitting the grinding disc 9
1. Disconnect the mains plug from the power outlet.
2. Check that the O-ring is in place in the clamping flange and that it is undamaged.
Result
The O-ring is damaged.
There is no O-ring in the clamping flange.
▶Fit a new clamping flange with O-ring.
3. Fit the clamping flange onto the drive spindle.
4. Fit the grinding disc.
5. Screw on the clamping nut corresponding to the type of accessory tool fitted.
6. Press the spindle lockbutton and hold it in this position.
7. Use the pin wrench to tighten the clamping nut securely, then release the spindle
lockbutton and remove the wrench.
6.4.2 Removing the grinding disc
1. Disconnect the mains plug from the power outlet.
CAUTION
Risk of breakage and irreparable damage. If the spindle lockbutton is pressed
while the spindle is rotating, this may cause the accessory tool to work loose or
detach from the power tool.
▶Press the spindle lockbutton only when the spindle has stopped rotating.
2. Press the spindle lockbutton and hold it in this position.
3. Release the clamping nut by gripping it with the pin wrench and turning the nut
counterclockwise.
4. Release the spindle lockbutton and remove the grinding disc.

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6.4.3 Fitting a grinding disc with a Kwik lock nut 10
CAUTION
Risk of breakage. Heavy wear (abrasion) may cause the Kwik lock nut to break.
▶When working with the power tool, make sure that the Kwik lock nut doesn’t
come into contact with the working surface.
▶Do not use a damaged Kwik lock nut.
Note
The optional Kwik lock nut can be used instead of the standard clamping nut.
Grinding discs can then be changed without the need for additional tools.
1. Disconnect the supply cord plug from the power outlet.
2. Clean the clamping flange and the quick-release clamping nut.
3. Check that the O-ring is in place in the clamping flange and that it is undamaged.
Result
The O-ring is damaged.
There is no O-ring in the clamping flange.
▶Fit a new clamping flange with O-ring.
4. Fit the clamping flange onto the drive spindle.
5. Fit the grinding disc.
6. Screw on the Kwik lock nut until it is seated against the grinding disc.
◁The name Kwik lock should be visible when the nut is screwed on.
7. Press the spindle lockbutton and hold it in this position.
8. Turn the grinding disc firmly by hand in a clockwise direction until the Kwik lock nut
is tightened securely and then release the spindle lockbutton.
6.4.4 Removing a grinding disc secured with a Kwik lock nut
1. Disconnect the mains plug from the power outlet.
CAUTION
Risk of breakage and irreparable damage. If the spindle lockbutton is pressed
while the spindle is rotating, this may cause the accessory tool to work loose or
detach from the power tool.
▶Press the spindle lockbutton only when the spindle has stopped rotating.
2. Press the spindle lockbutton and hold it in this position.
3. Release the Kwik lock nut by turning it counterclockwise by hand.
4. If the Kwik lock nut cannot be released by turning it by hand, use a pin wrench to turn
the nut in a counterclockwise direction.
Note
Never use a pipe wrench! A pipe wrench could damage the Kwik lock nut.
5. Release the spindle lockbutton and remove the grinding disc.
6.5 Fitting the core bit 11
1. Disconnect the mains plug from the power outlet.
2. Fit the side handle. → page 12
3. Fit the guard. → page 12
4. Place the core bit in position and tighten it hand-tight.