Hilti AG 125-8SE, AG 125-7SE User Manual
AG 125-7SE
AG 125-8SE
Printed: 08.09.2017 | Doc-Nr: PUB / 5373346 / 000 / 00
English
Printed: 08.09.2017 | Doc-Nr: PUB / 5373346 / 000 / 00
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 personal 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 handling the product.
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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
Rated speed
Diameter
Protection class II (double-insulated)
1.4 Product information
Hilti products are designed for professional use and may be operated, ser-
viced and maintained only by trained, authorized personnel. This personnel
must be informed of any particular hazards that may be encountered. The
product 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. You will be required to
state the product details when contacting Hilti Service or your local Hilti
organization to enquire about the product.
Product information
Angle grinder AG 125-8SE | AG 125-7SE
Generation 05
Serial no.
1.5 Declaration of conformity
We declare, on our sole responsibility, that the product described here
complies with the applicable directives and standards. A copy of the
declaration of conformity can be found at the end of this documentation.
The technical documentation is filed and stored here:
Hilti Entwicklungsgesellschaft mbH | Tool Certification | Hiltistrasse 6 | 86916
Kaufering, Germany
2 Safety
2.1 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.
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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.
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.
▶ 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 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.
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▶ 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 and/or the battery
pack from the power tool before making any adjustments, changing
accessories, or storing power tools. Such preventive safety measures
reduce the risk of starting the power tool accidentally.
▶ Store idle power tools out of the reach of children and do not
allow persons unfamiliar with the power tool or these instructions
to operate the power tool. Power tools are dangerous in the hands of
untrained users.
▶ Maintain power tools. Check for misalignment or 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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2.2 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.
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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.
▶ 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.
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▶ 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.
▶ 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,
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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 man-
ufacturers 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 attach-
ment 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.
2.3 Additional safety instructions
Personal safety
▶ Only use the product if it is in perfect working order.
▶ Never tamper with or modify the tool in any way.
▶ Avoid touching rotating parts – risk of injury!
▶ Wear protective gloves also when changing the accessory tool. Touching
the accessory tool presents a risk of injury (cuts or burns).
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