Hilti AG 125-A22 User manual

*438684*
438684
AG 125-A22
Operating instructions en
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cn
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Инструкция по зксплуатации ru
Kulllanma Talimatı tr
Instrucţiuni de utilizare ro
Ръководство за обслужване bg
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Brugsanvisning da
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Kasutusjuhend et
Пайдалану бойынша басшылықkk
Printed: 07.07.2013 | Doc-Nr: PUB / 5129818 / 000 / 00

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ORIGINAL OPERATING INSTRUCTIONS
AG 125-A22 angle grinder
It is essential that the operating instructions
are read before the power tool is operated for
the first time.
Always keep these operating instructions to-
gether with the power tool.
Ensure that the operating instructions are
with the power tool when it is given to other
persons.
Contents Page
1 General information 1
2Description 2
3 Insert tools, accessories 4
4 Technical data 4
5 Safety instructions 5
6Beforeuse 10
7 Operation 12
8 Care and maintenance 13
9 Troubleshooting 13
10 Disposal 14
11 Manufacturer’s warranty - tools 14
12 EC declaration of conformity (original) 15
1These numbers refer to the corresponding illustra-
tions. The illustrations can be found on the fold-out cover
pages. Keep these pages open while studying the oper-
ating instructions.
In these operating instructions, the designation “power
tool” always refers to the AG 125‑A22 cordless angle
grinder.
Operating controls and parts 1
@Ventilation slots
;On / off switch
=Switch-on interlock
%Vibration-absorbing side handle
&Spindle lockbutton
(Guard release button
)Spindle
+Guard
§Clamping flange with O-ring
/Cutting disc / grinding disc
:Clamping nut
·Kwik‑Lock quick-release clamping nut (optional)
$Wrench
£Battery
|Release buttons with additional function (charge
status display activation)
1 General information
1.1 Safety notices and their meaning
DANGER
Draws attention to imminent danger that will lead to
seriousbodilyinjuryorfatality.
WARNING
Draws attention to a potentially dangerous situation that
could lead to serious personal injury or fatality.
CAUTION
Draws attention to a potentially dangerous situation that
could lead to slight personal injury or damage to the
equipment or other property.
NOTE
Draws attention to an instruction or other useful informa-
tion.
1.2 Explanation of the pictograms and other
information
Warning signs
General
warning Warning: electricity Warning: hot surface Warning: caustic
substances
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Obligation signs
Wear eye
protection Wear a hard hat Wear ear protection Wear protective
gloves
Wear
breathing
protection
Symbols
Read the
operating
instructions
before use
Return waste
material for
recycling.
Volts Direct
current
Rated speed Revolutions
per minute Revolutions per minute Diameter
Location of identification data on the power tool
The type designation and serial number can be found
on the type identification plate on the machine or tool.
Makeanoteofthisdatainyouroperatinginstructions
and always refer to it when making an enquiry to your
Hilti representative or service department.
Type:
Generation: 01
Serial no.:
2 Description
2.1 Use of the product as directed
The power tool is designed for cutting, grinding and brushing metal or mineral materials (concrete, stone, etc.) without
use of water.
The working environment may be as follows: construction site, workshop, renovation, conversion or new construction.
Do not use the battery as a power source for other unspecified appliances.
Working with metals: Cutting, rough grinding, fine grinding, brushing
Working with mineral materials: Cutting, slitting using the corresponding guard (DC‑EX 125/5"-C), grinding using the
corresponding guard (DG‑EX 125/5").
Use only grinding discs, cutting discs and other accessories that are approved for use at a speed of at least 11000
/min for max. 125 mm diameter.
Use only synthetic resin-bonded, fiber-reinforced grinding or cutting discs or diamond cutting discs approved for use
at a peripheral speed of 80 m/sec.
The power tool may be used only for dry cutting or grinding.
Cutting or grinding materials containing asbestos is not permissible.
When grinding stone, a vacuum cleaner equipped with the appropriate filter, e.g. a suitable Hilti vacuum cleaner, must
be used.
Modification of the power tool or tampering with its parts is not permissible.
To avoid the risk of injury, use only genuine Hilti accessories and insert tools.
Observe the information printed in the operating instructions concerning operation, care and maintenance.
The power tool is designed for professional use and may be operated, serviced and maintained only by trained,
authorized personnel. This personnel must be informed of any special hazards that may be encountered. The power
tool and its ancillary equipment may present hazards when used incorrectlybyuntrainedpersonnelorwhenusednot
as directed.
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2.2 Items supplied as standard
1 Power tool
1Sidehandle
1Guard
1Frontcover
1 Kwik‑Lock quick-release clamping nut (op-
tional)
1Flange
1Nut
1Wrench
1 Operating instructions
1 Protective glasses (optional)
2.3 Additional items required for operating the tool
B22/3.3 or B22/2.6 Li‑ion battery and C4/36‑ACS, C4/36‑ACS‑TPS, C4/36, C4/36‑90 or C4/36‑350 charger.
2.4 Constant-speed electronics / automatic brake
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.
Disc deceleration time is reduced automatically.
2.5 Temperature-dependent motor protection
The temperature-dependent motor protection system prevents the power tool overheating by monitoring current input
and motor temperature.
In the event of motor overload due to application of excessive pressure to the disc, performance will drop noticeably
or the power tool may stop running (avoid stalling the power tool in this way).
Permissible tool overload cannot be given as a specific value as it depends on the temperature of the motor.
If the power tool has been overloaded, release the pressure applied and then allow it to run under no load for approx.
30 seconds.
2.6 DC‑EX 125/5"‑C compact dust removal hood for cutting
For cutting concrete and masonry.
CAUTION
Use of this guard for working on metal is not permissible.
NOTE
It is recommended that a dust removal system consisting of matched components, i.e. dust removal hood and a
suitable Hilti vacuum cleaner, are used for cutting, grinding and slitting work on mineral materials such as concrete or
stone. These serve to protect the operator and increase the life of the power tool and disc used.
2.7 Guard with front cover 2
CAUTION
When using cutting discs to cut metals, the guard with front cover must be fitted.
2.8 DG-EX 125/5" dust removal hood for grinding 3
The power tool is suitable only for occasional use with diamond cup wheels for grinding mineral materials.
CAUTION
Use of this guard for working on metal is not permissible.
NOTE
It is recommended that a dust removal system consisting of matched components, i.e. dust removal hood and a
suitable Hilti vacuum cleaner, are used for cutting, grinding and slitting work on mineral materials such as concrete or
stone. These serve to protect the operator and increase the life of the power tool and disc used.
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2.9 Lithium‑ion battery charge status
Whenalithium-ionbatteryisused,thechargestatuscanbeindicatedbygently pressing one of the battery release
buttons (press until resistance is felt - do not release the battery). The display on the rear of the battery provides the
following information:
LEDs light constantly LEDs blink Charge status C
LED 1,2,3,4 -C≧75%
LED 1,2,3 -50 % ≦ C < 75 %
LED 1,2 -25 % ≦ C < 50 %
LED 1 -10 % ≦ C < 25 %
-LED 1 C<10%
3 Insert tools, accessories
Discs of max. 125 mm diameter designed for 11000 /min and a peripheral speed of 80 m/sec
Designation Item number, description
Abrasive cutting disc AC‑D
Abrasive grinding disc AG‑D, AF‑D
Diamond cutting disc DC‑D
Diamond grinding disc DG‑CW
Accessories for the AG 125‑A22
Designation Short designation Description
Kwik‑Lock quick-release clamping
nut (optional)
Dust removal hood for grinding DG-EX 125/5"
Guard with front cover
Compact dust removal hood DC-EX 125/5" C
Toolbox
Vacuum cleaner recommended by
Hilti
Battery B 22/2.6 Li‑Ion
Battery B 22/3.3 Li‑Ion
Charger for Li-ion batteries C 4/36, C 4/36‑ACS or
C 4/36‑ACS TPS
Charger for Li-ion batteries C 4/36‑90
Charger for Li-ion batteries C 4/36‑350
4 Technical data
Right of technical changes reserved.
Power tool AG 125‑A22
Rated voltage 21.6 V
Rated speed 9,500/min
Cutting discs / grinding discs Ø125
Dimensions (L x H x W) without hood 351 mm x 131 mm x 93 mm
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Power tool AG 125‑A22
Weight in accordance with EPTA procedure 01/2003 2.7 kg
Battery B 22/2.6 Li‑Ion B 22/3.3 Li‑Ion
Rated voltage 21.6 V 21.6 V
Capacity 2.6 Ah 3.3 Ah
Energy capacity 56.16 Wh 71.28 Wh
Weight 0.78 kg 0.78 kg
Type of cell Li-ion Li-ion
No. of cells 12 12
Deep discharge protection Yes Yes
Information about the power tool and applications
Drive spindle thread (arbor size) M 14
Spindle length 22 mm
NOTE
The vibration emission level given in this information sheet has been measured in accordance with a standardised test
giveninEN60745andmaybeusedtocompareonetoolwithanother.Itmaybeused 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 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.
Noise information (as perEN 60745‑2‑3):
Typical A-weighted sound power level 94 dB (A)
Typical A-weighted emission sound pressure level 83 dB (A)
Uncertainty for the given sound level 3 dB (A)
Vibration information in accordance with EN 60745
Triaxial vibration value (vibration vector sum) for the
AG 125‑A22 Measured in accordance with EN 60745‑2‑3
Surface grinding using the vibration-absorbing side
handle, ah,AG
3.8 m/s²
Uncertainty (K) 1.5 m/s²
Additional information Other applications such as cutting or wire brushing
may produce vibration values different to those given.
5 Safety instructions
NOTE
The safety rules in section 5.1 contain all general safety
rules for power tools which, in accordance with the
applicable standards, must be listed in the operating
instructions. Accordingly, some of the rules listed may
not be relevant to this tool.
5.1 General power tool safety warnings
a) WARNING
Read all safety warnings and all instructions. Fail-
ure to follow the warnings and instructions may result
in electric shock, fire and/or serious injury. Save all
warnings and instructions for future reference.
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The term “power tool” in the warnings refers to
your mains-operated (corded) power tool or battery-
operated (cordless) power tool.
5.1.1Workareasafety
a) Keep work area clean and well lit. Cluttered or dark
areas invite accidents.
b) Do not operate power tools in explosive atmo-
spheres, such as in the presence of flammable
liquids, gases or dust. Power tools create sparks
which may ignite the dust or fumes.
c) Keep children and bystanders away while operat-
ing a power tool. Distractions can cause you to lose
control.
5.1.2 Electrical safety
a) Power tool plugs must match the outlet. Never
modify the plug in any way. Do not use any ad-
apter plugs with earthed (grounded) power tools.
Unmodified plugs and matching outlets will reduce
risk of electric shock.
b) 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.
c) Do not expose power tools to rain or wet condi-
tions. Water entering a power tool will increase the
risk of electric shock.
d) 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
theriskofelectricshock.
e) 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.
f) 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.
5.1.3 Personal safety
a) 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.
b) 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.
c) Prevent unintentional starting. Ensure the switch
is in the off‐position before connecting to power
source and/or battery pack, picking up or carrying
the tool. Carrying power tools with your finger on the
switch or energising power tools that have the switch
on invites accidents.
d) Remove any adjusting key or wrench before turn-
ing the power tool on. A wrench or a key left at-
tached to a rotating part of the power tool may result
in personal injury.
e) Do not overreach. Keep proper footing and bal-
ance at all times. This enables better control of the
power tool in unexpected situations.
f) 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.
g) 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.
5.1.4 Power tool use and care
a) 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.
b) 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.
c) 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.
d) Store idle power tools out of the reach of chil-
dren 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.
e) 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.
f) Keep cutting tools sharp and clean. Properly main-
tained cutting tools with sharp cutting edges are less
likely to bind and are easier to control.
g) 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 opera-
tions different from those intended could result in a
hazardous situation.
5.1.5 Battery tool use and care
a) Recharge only with the charger specified by the
manufacturer. A charger that is suitable for one
type of battery pack may create a risk of fire when
used with another battery pack.
b) Use power tools only with specifically designated
battery packs. Use of any other battery packs may
create a risk of injury and fire.
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c) When battery pack is not in use, keep it away
from other metal objects, like paper clips, coins,
keys, nails, screws or other small metal objects,
that can make a connection from one terminal to
another. Shorting the battery terminals together may
cause burns or a fire.
d) Under abusive conditions, liquid may be ejected
from the battery; avoid contact. If contact acci-
dentally occurs, flush with water. If liquid contacts
eyes, additionally seek medical help. Liquid ejec-
ted from the battery may cause irritation or burns.
5.1.6 Service
a) Have your power tool servicedby a qualified repair
person using only identical replacement parts.
This will ensure that the safety of the power tool is
maintained.
5.2 Additional safety instructions
5.2.1 Safety warnings common for grinding,
sanding, wire brushing, polishing or abrasive
cutting-off operations
a) 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. Fail-
ure to follow all instructions listed below may result
in electric shock, fire and/or serious injury.
b) Operations such 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.
c) Do not use accessories which are not specifically
designed and recommended by the tool manufac-
turer. Just because the accessory can be attached
to your power tool, it does not assure safe operation.
d) 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.
e) The outside diameter and the thickness of your
accessory must be within the capacity rating of
your power tool. Incorrectly sized accessories can-
not be adequately guarded or controlled.
f) The arbour size of wheels, flanges, backing pads
or any other accessory must properly fit the
spindle of the power tool. Accessories with ar-
bour holes that do not match the mounting hardware
of the power tool will run out of balance, vibrate
excessively and may cause loss of control.
g) 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.
h) 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 opera-
tions. The dust mask or respirator must be capable of
filtrating particles generated by your operation. Pro-
longed exposure to high intensity noise may cause
hearing loss.
i) 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.
j) 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.
k) Position the cord clear of the spinning accessory.
If you lose control, the cord may be cut or snagged
andyourhandorarmmaybepulledintothespinning
accessory.
l) Never lay the power tool down until the access-
ory has come to a complete stop. The spinning
accessory may grab the surface and pull the power
tool out of your control.
m) 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.
n) 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.
o) Do not operate the power tool near flammable
materials. Sparks could ignite these materials.
p) Do not use accessories that require liquid
coolants. Using water or other liquid coolants may
result in electrocution or shock.
5.2.2 Kickback and related warnings
Kickback is a sudden reaction to a pinched or snagged
rotating wheel, backing pad, brush or any other access-
ory. 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
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pinching. Abrasive wheels may also break under these
conditions.
Kickback is the result of power tool misuse and/or in-
correct operating procedures or conditions and can be
avoided by taking proper precautions as given below.
a) Maintain a firm grip on the power tool and po-
sition 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.
b) Never place your hand near the rotating access-
ory. Accessory may kickback over your hand.
c) Do not position your body inthe 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.
d) Use special care when working corners, sharp
edges etc. Avoid bouncing and snagging the ac-
cessory. Corners, sharp edges or bouncing have a
tendency to snag the rotating accessory and cause
loss of control or kickback.
e) Do not attach a saw chain woodcarving blade or
toothed saw blade. Such blades create frequent
kickback and loss of control.
5.2.3 Safety warnings specific for grinding and
abrasive cutting-off operations
a) 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.
b) The guard must be securely attachedto the power
tool and positioned for maximum safety, so the
least amount of wheel is exposed towards the op-
erator. The guard helps to protect operator from
broken wheel fragments, accidental contact with
wheel and sparks that could ignite clothing.
c) Wheels must be used only for recommended ap-
plications. For example: do not grind with the side
of cut-off wheel.Abrasive cut-off wheels are inten-
ded for peripheral grinding, side forces applied to
these wheels may cause them to shatter.
d) Always use undamaged wheel flanges that are of
correct size and shape for your selected wheel.
Proper wheel flanges support the wheel thus redu-
cing the possibility of wheel breakage. Flanges for
cut-off wheels may be different from grinding wheel
flanges.
e) 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.
5.2.4 Additional safety warnings specific for
abrasive cutting-off operations
a) Do not ²jam² 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.
b) 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.
c) 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.
d) Do not restart the cutting operation in the work-
piece. Let the wheel reach full speed and carefully
reenter the cut. The wheel may bind, walk up or kick-
back if the power tool is restarted in the workpiece.
e) 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.
f) Use extra caution when making a "pocket cut"
into existing walls or other blind areas. The pro-
truding wheel may cut gas or water pipes, electrical
wiring or objects that can cause kickback.
5.2.5 Additional safety instructions for sanding
operations
a) Do not use excessively oversized sanding disc
paper. Follow manufacturers recommendations,
when selecting sanding paper. Larger sanding pa-
per extending beyond the sanding pad presents a
laceration hazard and may cause snagging, tearing
ofthediscorkickback.
5.2.6 Safety warnings specific for wire brushing
operations
a) 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.
b) 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.
5.3 Additional safety instructions
5.3.1 Personal safety
a) Wear ear protectors. Exposure to noise can cause
hearing loss.
b) Always hold the power tool securely with both
hands on the grips provided. Keep the grips dry,
clean and free from oil and grease.
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c) Breathing protection must be worn if the power
tool is used without a dust removal system for
work that creates dust.
d) Do not operate the power tool without the pro-
tective devices that belong to it.
e) Operate the power tool only as intended and when
it is in faultless condition.
f) Improve the blood circulation in your fingers by
relaxing your hands and exercising your fingers
during breaks between working.
g) Switch the power tool on only after bringing it into
position at the workpiece.
h) Remove the battery before storing or transporting
the power tool.
i) Never brake the tool by applying lateral pressure
to the grinding or cutting disc.
j) Do not touch the clamping flange or the clamping
screw while the power tool is running.
k) Never press the spindle lockbutton while the
grinding or cutting disc is still rotating.
l) Never direct the power tool toward persons.
m) Adjust the pressure applied to the grinding or
cutting disc to suit the material you are working
on, so that the grinding or cutting disc doesn’t
stall, possibly causing the tool to kick back.
n) Avoid touching rotating parts. Switch the power
tool on only after bringing it into position at the
workpiece. Touching rotating parts, especially rotat-
ing insert tools, may lead to injury.
o) When grinding with straight grinding discs and
cutting with cutting discs in metalworking applic-
ations, use only the guard with cover plate. This is
available as an optional accessory.
p) Children must be instructed not to play with the
power tool.
q) The power tool is not intended for use by children,
by debilitated persons or those who have received
no instruction or training.
r) Do not use the power tool if it starts with a jolt.This
may be an indication that the electronic control unit
is defective. Have the tool repaired at an authorized
Hilti service center right away.
s) Dust from material such as paint containing lead,
some wood species, minerals and metal may be
harmful. Contact with or inhalation of the dust may
cause allergic reactions and/or respiratory diseases
to the operator 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 must only be treated by special-
ists. Where the use of a dust extraction device is
possible it shall be used. To achieve a high level
of dust collection, use a suitable vacuum cleaner
of the type recommended by Hilti for wood dust
and/or mineral dust together with this tool. Ensure
that the workplace is well ventilated. The use of a
dust mask of filter class P2 is recommended. Fol-
low national requirements for the materials you
want to work with.
5.3.2 Power tool use and care
a) Grinding discs must be stored and handled care-
fully in accordance with the manufacturer’s in-
structions.
b) Check that the grinding disc is fitted in accord-
ance with the manufacturer's instructions.
c) If use of a spacer ring or other intermediate part is
specified and the part is supplied with the grinding
disc, check to ensure that the part is fitted.
d) Before use, check that the cutting or grinding
disc has been fitted correctly and the clamping
nut tightened. Then allow the power tool to run
for 30 seconds under no load while holding it se-
curely. Switch off the power tool immediately if
significant vibration or any other faults are no-
ticed. Should this occur, examine the power tool
in order to determine the cause.
e) Never use the power tool without the guard.
f) Do not use separate reducing rings or adapters to
enable use of grinding discs with a larger mount-
ing hole.
g) If the grinding disc (or cup wheel, etc.) is equipped
with a threaded insert, check that the threaded
sectionislongenoughtotakeupthelengthof
the drive spindle.
h) The workpiece must be fixed securely in place.
i) Do not use cutting discs for grinding.
j) Take steps to ensure that flying sparks from the
tool do not present a hazard, i.e. by striking your-
self or other persons or by igniting inflammable
substances. Adjust the position of the disc guard
accordingly.
k) When working in dusty conditions, check to en-
sure that the cooling air openings remain unob-
structed. Should it become necessary to remove
dust deposits from the air openings, first unplug
the tool from the electric supply and then use a
non-metallic object to remove the dust, taking
care to avoid damaging parts inside the tool.
l) If the nut securing the disc and flange is not
tightened firmly, the disc may work loose from
the spindle due to the braking effect of the motor.
Tighten the disc / flange securing nut in accordance
with the directions given in the operating instructions.
Wait until the disc comes to a standstill.
5.3.3 Electrical safety
a) Before beginning work, check the working area
(e.g. using a metal detector) to ensure that no
concealed electric cables or gas and water pipes
are present. External metal parts of the power tool
may become live, for example, when an electric cable
is damaged accidentally. This presents a serious risk
of electric shock.
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b) Dirty or dusty power tools that have been used fre-
quently for work on conductive materials should
be checked at regular intervals at a Hilti Service
Center. Under unfavorable circumstances, damp-
ness or dust adhering to the surface of the tool,
especially dust from conductive materials, may lead
to damage to the tool.
5.3.4 Battery use and care
a) Observe the special instructions applicable to the
transport, storage and use of Li-ion batteries.
b) Do not expose batteries to high temperatures or
fire. This presents a risk of explosion.
c) Do not disassemble, squash or incinerate batter-
ies and do not subject them to temperatures over
80°C. A risk of fire, explosion or injury through con-
tact with caustic substances may otherwise result.
d) Do not use batteries other than those approved
for use with the applicable power tool or appli-
ance. Use of other batteries or use of the battery for
purposes for which it is not intended presents a risk
of fire and explosion.
e) Do not charge or continue to use damaged bat-
teries (e.g. batteries with cracks, broken parts,
bent or pushed-in and/or pulled-out contacts).
f) If the battery gets too hot to touch, this may indicate
that it is faulty. Place the tool in a location where
it can be kept under observation, well away from
flammable materials, and allow it to cool down.
Contact Hilti Service after the battery has been
allowedtocool.
5.3.5 Work area safety
a) Ensure that the workplace is well lit.
b) Ensure that the workplace is well ventilated. Ex-
posure to dust at a poorly ventilated workplace may
result in damage to the health.
5.3.6 Personal protective equipment
The user and any other persons in the vicinity must
wear suitable eye protection, a hard hat, ear protec-
tion, protective gloves and breathing protection while
the power tool is in use.
6Beforeuse
WARNING
Never use the power tool without the guard.
6.1 Battery use and care
NOTE
Battery performance drops at low temperatures. Use the
tool only after fully charging the battery. This ensures
that maximum battery capacity is available. Change to
a second battery as soon as a drop in performance is
noticed. Recharge the battery immediately so that it is
ready for reuse.
Store the battery in a cool, dry place. Never store the
battery where it is exposed to direct sunlight or sources
of heat, e.g. on heaters / radiators or behind a motor
vehicle windscreen. Batteries that have reached the end
of their life must be disposed of safely and correctly to
avoid environmental pollution.
6.2 Charging the battery
DANGER
Only used the specified Hilti battery packs and Hilti
battery chargers which are listed under "Accessor-
ies".
6.2.1 Charging a new battery for the first time
Charge the battery fully before using it for the first time.
6.2.2 Charging a previously used battery
Ensure that the outer surfaces of the battery are clean
and dry before inserting it in the corresponding charger.
Read the operating instructions for the charger for further
information about the charging procedure.
Lithium-ion battery packs are ready to use at any time,
even when only partially charged. Charging progress
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is indicated by the LED display (see charger operating
instructions).
6.3 Fitting the battery
CAUTION
Check that the power tool is switched off and the
switch interlock activated before fitting the battery.
Use only the Hilti batteries approved for use with this
power tool.
CAUTION
Check that the terminals on the battery and in the
power tool are free from foreign objects before in-
serting the battery in the power tool.
1. Push the battery into the power tool from the rear as
far as it will go and until it is heard to engage with a
double click.
2. CAUTION If it is not fitted securely, the battery
could fall out while you are working with the tool.
CAUTION A falling battery may present a risk of
injury to yourself or others.
Before beginning the work, check that the battery is
fitted securely to the tool.
6.4 Removing the battery from the power tool
1. Press both battery release buttons.
2. Pull the battery out of the power tool toward the
rear.
6.5 Transport and storage of battery packs
Pull the battery pack out of the locked position (working
position) and move it into the first click-stop position
(transport position).
If you disconnect a battery pack from the power tool
for transport or storage, make sure that the contacts of
the battery pack are not short-circuited. Remove loose
metal parts such as screws, nails, clamps, loose screw
bits, wires or metal swarf from the case, toolbox or
transport container, or prevent these parts from coming
into contact with the battery packs.
Observe national and international transport regulations
when shipping battery packs (transportation by road, rail,
sea or air).
6.6 Fitting the side handle
WARNING
The side handle must be fitted for all types of work.
Thesidehandlemaybescrewedontothetoolonthe
right or left.
6.7 Working with the power tool
Take care to ensure that the closed side of the guard is
always positioned toward the operator’s body.
Adjust the position of the guard to suit the requirements
of the work being done.
6.7.1 Fitting the guard 5
NOTE
The guard is equipped with locating lugs that ensure only
guards of a type suitable for use with the power tool can
be fitted. The locating lugs of the guard fit into the guard
mount on the power tool.
1. Pull the battery out of the power tool.
2. 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.
3. Push the guard onto the drive spindle collar; press
the guard release button.
4. Rotate the guard until it engages and the guard
release button jumps back into its original position.
6.7.1.1 Adjusting the guard
1. Pull the battery out of the tool.
2. Press the guard release button and then rotate the
guard until it engages in the desired position.
6.7.2 Fitting the cutting and grinding guards
NOTE
Read the instructions for fitting the corresponding guard.
NOTE
If you use the front cover, fit it by pushing it onto the
guard.
6.7.2.1 Fitting the cutting guard 46
NOTE
Take care to ensure that the on / off switch is freely
accessible and operable at all times.
6.8 Fitting the cutting / grinding disc 79
WARNING
If the nut securing the disc and flange is not tightened
firmly, the disc may work loose from the spindle due
to the braking effect of the motor. Tighten the disc
/ flange securing nut in accordance with the directions
given in the operating instructions. Wait until the disc
comes to a standstill.
DANGER
Check that the speed rating printed on the cutting
or grinding disc is equal to or higher than the rated
speed of the power tool (see accessories).
DANGER
Check the condition of the grinding disc before using
it. Do not use accessories (e.g. discs) that are broken,
cracked or damaged in any way.
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1. Pull the battery out of the tool.
2. CAUTION The clamping flange is equipped with an
O-ring. The O-ring must be replaced if missing or
damaged.
Fit the clamping flange onto the drive spindle (keyed
fit to prevent slipping/rotation).
3. Fit the diamond disc, cutting disc or grinding disc.
4. Screw on the clamping nut according to the type of
disc fitted.
5. CAUTION Do not press the spindle lockbutton
before the drive spindle has stopped rotating.
Press the spindle lockbutton and hold it in this
position.
6. Use the wrench to tighten the clamping nut securely
and then release the spindle lockbutton.
6.9 Using the Kwik-Lock clamping nut with
grinding / cutting discs
6.9.1 Fitting grinding / cutting discs using the
Kwik-Lock clamping nut 
NOTE
The Kwik-Lock nut may be used instead of the standard
clamping nut. No tools are then required for changing
cutting discs.
NOTE
The Kwik-Lock nut cannot be used with cup wheels,
brushes, rubber backing pads, tuck pointing discs (spe-
cial discs used for joint repair) or with diamond cup
wheels.
CAUTION
When operating the power tool, take care to ensure
that the Kwik-Lock nut does not come into contact
with the work surface. Do not use a damaged Kwik-
Lock nut.
NOTE
The arrow on the upper surface of the nut must be within
the index marks. If the arrow is not within the index marks
when the nut is tightened it will be impossible to release
the nut by hand. In this case, use the pin wrench to
release the Kwik-Lock nut (do not use a pipe wrench!).
1. Pull the battery out of the power tool.
2. Clean the clamping flange and the quick-release
clamping nut.
3. CAUTION The clamping flange is equipped with an
O-ring. The O-ring must be replaced if missing or
damaged.
Fit the clamping flange onto the drive spindle.
4. Fit the diamond disc, cutting disc or grinding disc.
5. Screw the quick-release clamping nut onto the
spindle until it contacts the disc (the side with the
lettering should be visible after the nut is screwed
on).
6. CAUTION Do not press the spindle lockbutton
before the drive spindle has stopped rotating.
Press the spindle lockbutton and hold it in this
position.
7. Use the wrench to tighten the clamping nut or,
respectively, rotate the grinding disc firmly by hand
in a clockwise direction until the Kwik‑Lock nut is
tight, and then release the spindle lockbutton.
6.9.2 Removing grinding / cutting discs secured
with the Kwik-Lock nut
1. Pull the battery out of the tool.
2. Release the Kwik-Lock nut by turning the knurled
ring in a counterclockwise direction. (Use the pin
wrench to release the Kwik-Lock nut if very tight. Do
not use a pipe wrench.)
7Operation
WARNING
Wear personal protective equipment. Exposure to
noise can cause hearing loss.
WARNING
Test new cutting or grinding discs by allowing them
to run at maximum speed in a protected area for at
least 30 seconds.
WARNING
Slits cut in loadbearing walls of buildings or other struc-
tures may influence the statics of the structure, especially
when steel reinforcing bars or load-bearing components
are cut through. Consult the structural engineer, ar-
chitect, or person in charge of the building project
before beginning the work.
WARNING
Never use the tool without the side handle and the
corresponding guard.
CAUTION
Use clamps or a vice to hold the workpiece securely.
CAUTION
Working on the material may cause it to splinter. Wear
eye protection and protective gloves. Wear breathing
protection if no dust removal system is used. Splin-
tering material presents a risk of injury to the eyes and
body.
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CAUTION
Breathing protection must be worn if the power tool
is used without a dust removal system for work that
creates dust.
WARNING
Avoid touching rotating parts. Switch the power tool
on only after bringing it into position at the workpiece.
Touching rotating parts, especially rotating insert tools,
may lead to injury.
CAUTION
The insert tool may get hot during use. Wear protective
gloves when changing insert tools.
WARNING
Reduce the load on the power tool by avoiding tilting
the disc in the kerf when cutting. Thediscorwheel
may otherwise break, or the power tool may kick back or
stall.
CAUTION
Improve the blood circulation in your fingers by re-
laxing your hands and exercising your fingers during
breaks between working.
WARNING
Keep inflammable materials away from the working
area.
7.1 On / off switch with switch-on interlock 8
Theon/offswitchwithsafetylock(switch-oninterlock)
gives you full control of the switch function and avoids
unintentional restarting.
1. Push the safety lock (switch-on interlock) forward to
unlock the on / off switch and then press the switch
fully.
2. The safety lock (switch-on interlock) returns auto-
matically to the locked position when the on / off
switch is released.
8 Care and maintenance
CAUTION
Before beginning cleaning, remove the battery from
the power tool in order to prevent unintentional start-
ing.
8.1 Care of the power tool
DANGER
Under extreme conditions, when used for working on
metal, conductive dust may accumulate inside the tool.
In this case, use of a stationary dust extraction sys-
tem and frequent cleaning of the ventilation slots are
recommended.
The outer casing of the power tool is made from impact-
resistant plastic. Sections of the grip are made from a
synthetic rubber material.
Never operate the power tool when the ventilation slots
are blocked. Clean the ventilation slots carefully using
a dry brush. Do not permit foreign objects to enter the
interior of the power tool. Clean the outside of the power
tool at regular intervals with a slightly damp cloth. Do
not use a spray, steam pressure cleaning equipment or
running water for cleaning. This may negatively affect the
electrical safety of the power tool. Always keep the grip
surfaces of the power tool free from oil and grease. Do
not use cleaning agents which contain silicone.
8.2 Maintenance
WARNING
Do not operate the tool if parts are damaged or
when the controls do not function faultlessly. Have
the power tool repaired by Hilti Service.
WARNING
Repairs to the electrical section of the power tool may
be carried out only by trained electrical specialists.
Check all external parts of the power tool for damage
at regular intervals and check that all controls operate
faultlessly.
8.3 Checking the power tool after care and
maintenance
After carrying out care and maintenance work on the
power tool, check that all protective and safety devices
are fitted and that they function faultlessly.
9 Troubleshooting
Fault Possible cause Remedy
The battery runs down more
quickly than usual. Battery condition is not optimal. Have battery condition diagnosed by Hilti Service or replace with a new
battery.
The battery doesn’t engage with
an audible click. The retaining lugs on the battery are
dirty. Clean the retaining lugs and check that the battery engages securely.
Contact Hilti Service if the problem
persists.
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Fault Possible cause Remedy
LED 1 blinks. The battery is discharged. Charge the battery.
The tool is overloaded (application
limits exceeded). Use the right power tool for the job (don’t use a low-powered tool for
heavy work).
The power tool doesn’t run and
1LEDblinks. The battery is discharged. Change the battery and recharge the discharged battery.
The battery is too hot or too cold. Bring the battery to the recommen-
ded working temperature.
The tool doesn’t work and all 4
LEDs blink. The power tool has been overloaded briefly. Release the switch and press it again.
The overheating prevention cut-out
has been activated. Allow the power tool to cool down.
The power tool or the battery
becomes very warm. Electrical fault. Switch the power tool off immedi- ately, remove the battery and contact
Hilti Service.
The power tool has been overloaded
(application limits exceeded). Use the right power tool for the job (don’t use a low-powered tool for
heavy work).
The power tool doesn’t achieve
full power. A battery with inadequate capacity was used. Use a battery with a capacity of at least 2.6 Ah.
10 Disposal
Most of the materials from which Hilti power tools or appliances are manufactured can be recycled. The materials
must be correctly separated before they can be recycled. In many countries, Hilti has already made arrangements for
taking back your old power tools or appliances for recycling. Please ask your Hilti customer service department or
Hilti representative for further information.
For EC countries only
Disposal of electric tools together with household waste is not permissible.
In observance of the European Directive on waste electrical and electronic equipment and its imple-
mentation in accordance with national law, electrical appliances that have reached the end of their life
must be collected separately and returned to an environmentally compatible recycling facility.
11 Manufacturer’s warranty - tools
Hilti warrants that the tool supplied is free of defects in
materialandworkmanship.Thiswarrantyisvalidsolong
as the tool is operated and handled correctly, cleaned
and serviced properly and in accordance with the Hilti
Operating Instructions, and the technical system is main-
tained. This means that only original Hilti consumables,
components and spare parts may be used in the tool.
This warranty provides the free-of-charge repair or re-
placement of defective parts only over the entire lifespan
of the tool. Parts requiring repair or replacement as a
result of normal wear and tear are not covered by this
warranty.
Additional claims are excluded, unless stringent na-
tional rules prohibit such exclusion. In particular, Hilti
is not obligated for direct, indirect, incidental or con-
sequential damages, losses or expenses in connec-
tion with, or by reason of, the use of, or inability to
use the tool for any purpose. Implied warranties of
merchantability or fitness for a particular purpose are
specifically excluded.
For repair or replacement, send the tool or related parts
immediately upon discovery of the defect to the address
of the local Hilti marketing organization provided.
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This constitutes Hilti’s entire obligation with regard to
warranty and supersedes all prior or contemporaneous comments and oral or written agreements concerning
warranties.
12 EC declaration of conformity (original)
Designation: Angle grinder
Type: AG 125-A22
Generation: 01
Year of design: 2011
We declare, on our sole responsibility, that this product
complies with the following directives and standards:
2006/42/EC, 2004/108/EC, 2006/66/EC, 2011/65/EU,
EN 60745‑1, EN 60745‑2‑3, EN ISO 12100.
Hilti Corporation, Feldkircherstrasse 100,
FL‑9494 Schaan
Paolo Luccini Jan Doongaji
Head of BA Quality and Process Man-
agement
Executive Vice President
Business Area Electric Tools & Ac-
cessories
Business Unit Power
Tools & Accessories
01/2012 01/2012
Technical documentation filed at:
Hilti Entwicklungsgesellschaft mbH
Zulassung Elektrowerkzeuge
Hiltistrasse 6
86916 Kaufering
Deutschland
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*438684*
438684
Hilti Corporation
LI-9494 Schaan
Tel.: [phone]
Fax: [phone]
www.hilti.com
Hilti = registered trademark of Hilti Corp., Schaan
W 4081 | 0213 | 00-Pos. 8 | 1
Printed in China © 2013
Right of technical and prgramme changes reserved S. E. & O. 438684 / A3
Printed: 07.07.2013 | Doc-Nr: PUB / 5129818 / 000 / 00