Lukas AMIN 12-125 TWH User manual

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OPERATION INSTRUCTIONS
AMIN 12-125 TWH

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Index
1 Safety Instructions..................................................................................................... 3
1.1 General safety instructions ........................................................................................ 3
1.2 Safety instructions for grinders .................................................................................. 3
1.3 Obligations of the owner operator.............................................................................. 6
1.4 Obligations of the personnel...................................................................................... 7
1.5 Warranty and liability ................................................................................................. 7
1.6 Explanation of the symbols........................................................................................ 7
1.7 Complying with the environmental protection regulations .......................................... 9
2 Intended Use............................................................................................................. 9
3 Installation................................................................................................................. 9
4 Starting Up .............................................................................................................. 10
4.1 Changing the abrasive wheel .................................................................................. 11
4.2 Adjusting the guard ................................................................................................. 12
4.3 Changing to left-handed operation .......................................................................... 13
5 Handling.................................................................................................................. 14
6 Disassembly – Assembly......................................................................................... 15
6.1 Spare parts drawing ................................................................................................ 19
6.2 Dimensions sheet.................................................................................................... 26
7 Maintenance and Servicing ..................................................................................... 26
7.1 Oil Change .............................................................................................................. 27
8 Help With Problems................................................................................................. 28
9 Scope of Supply ...................................................................................................... 29
10 Accessories to Special Order .................................................................................. 29
11 Storage ................................................................................................................... 30
12 Technical Data ........................................................................................................ 30
13 Statement of Conformity.......................................................................................... 31
14 Warranty Card......................................................................................................... 32

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1 Safety Instructions
1.1 General safety instructions
Read the operation instructions before starting work and follow the
instructions in operation.
In general, the owner operator of the machine is responsible for ensuring a flawless state with regard
to operation and compliance with the safety regulations. The machine has been built to the state of
the art and recognized safety rules. Nonetheless, there can be hazards to life and limb to the
operator or thirds parties when it is used, or else damage could be done to the machine or other
assets.
Only use the machine:
●for the intended purpose,
●in a flawless state regarding safety.
Note the technical data of the machine and the ambient temperatures. The intended use of the
machine is described in this documentation in section Intended Use and must be followed. The basic
precondition for safe working with and trouble-free operation of the machine is a knowledge of the
underlying safety instructions and the safety regulations. In addition, the rules and regulations that
apply at the place of use regarding accident prevention, the setting up of electrical and mechanical
systems and radio interference suppression are to be followed. Pay attention to the cleanliness of
the workplace in all maintenance and repair work. You may not eat or drink while working. If you
make any changes on your initiative that go beyond the intended use, the warranty shall be null and
void and the manufacturer shall have no liability whatsoever.
●The machines are not insulated against contact with electric cables and may not be used
in an atmosphere with a risk of explosion.
It is essential to follow the operation instructions, especially the safety symbols and safety
instructions on the machine and in the documentation.
1.2 Safety instructions for grinders
●Only use approved abrasive wheels with the appropriate diameter of shaft.
●The approved working speed of the abrasive wheel must be higher than the speed
of the grinder.
●Never use a grinder that is not in a proper working state or which has defective components.
●The abrasive wheels must stored and handled with care in accordance with the instructions of
the manufacturer.
●Check the abrasive wheel for damage before using it on the grinder. Never use abrasive wheels
that are chipped, cracked or damaged in any other way.
●The machine must be switched off in the event of a power failure.

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●When connecting or disconnecting the grinder it is essential to ensure that the operating lever is
not and cannot be operated.
●Disconnect the machine from the power supply when changing the tool.
●Never remove any safety devices mounted on the machine and ensure that they are attached
and working properly before you switch the machine on.
●Guards or covers are to be adjusted such that they direct sparks and grinding particles away
from the body.
●Strong vibration can be caused by machine tools that are not attached properly or are damaged.
●Do not use abrasive cutting-off wheels (on machines with a collet chuck).
●Never exceed the maximum permissible working speed. It must be checked regularly.
●Before starting up the machine, check that the abrasive wheel has been attached correctly and
done up tightly. Carry out a test run for 30 seconds when the machine is in a safe position and
not under load. Hold the machine in such a way that the broken pieces could not hit you in the
event of a breakage. The machine must be switched off at once if there is considerable vibration
or if damage is noticed, and after that the cause for these defects must be found.
●When working with certain materials it is possible for dust and vapours to be produced that could
create a potentially explosive atmosphere.
●The work pieces must be fixed adequately before starting work.
●Never use the machine in the vicinity of inflammable liquids or gases.
●Use suitable facilities at the workplace to keep the air clean if hazardous or explosive dusts,
vapours or aerosols are produced.
●The machine tool can still run on after it has been switched off. Put the grinder down in a safe
place and wait for it to stop without applying any pressure to the surface.
●As a matter of principle, use eye protection (EN 166 level B) and ear protection (EN
352). Wear gloves (EN 388 category 2) and protective clothing.
●Depending on the materials being worked with, personal protective equipment and dust
extraction must be provided.
●Do not wear loose-fitting clothing or jewelry. They could be caught up by moving parts. Wear a
hair net if you have long hair.
●Pay attention to the markings, restrictions on use and special notes on use on the abrasive
wheel and the grinder.
●Use a suitable abrasive wheel. An unsuitable product can create excessive amounts of grinding
particles, dust, vibration and noise.
●Only use abrasive wheels that meet the highest safety standards. These products carry the
relevant number of the EN standard and/or the "oSa" marking.
●Do not exceed the maximum pressure. Use a pressure regulator so the pressure is controlled
before it reaches the machine.

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●Abrasive wheels should be stored in such a way that they are not exposed to the harmful effects
of moisture, frost and large temperature variations or mechanical damage.
●Abrasive wheels on substrates should be stored at 18-22°C and 45-65% relative humidity.
●Abrasive belts should be stored on a rod or hook of at least 50 mm in diameter.
●Never use abrasive wheels that have passed their specified "use by" date.
●Do not change the grinder and the abrasive wheels after delivery. Never use force when
attaching them.
●Ensure that suitable chucking flanges are used and that these are in a good mechanical state
and free of foreign bodies such as grinding swarf.
●Only grind with the area of the abrasive wheel intended for that purpose. Avoid grinding with the
edges of abrasive belts, use the middle of the belt if at all possible.
●Abrasive belts that are not being used should be not be kept under tension.
●Avoid blocking and uneven wear to ensure efficient use of the abrasive wheel. If necessary,
dress it regularly.
●Check the grinder each time before use by making a visual inspection to ensure that it is
undamaged and suitable for the intended task.
●Only users with the relevant technical knowledge who have been trained by authorised
technicians who are aware of their responsibility may use the grinder.
●Use a respiratory protection mask (EN 149) if the work produces dust. The inhalation of grinding
dust can lead to lung damage.
●Disassembling or assembling our LUKAS grinder may only be done by us or an authorized
technician.
●Pay attention to flailing compressed air hoses - risk of injury.
●Use only the lubricants recommended by LUKAS.
●Take action at once if you feel tingling, stabbing pains or numbness after using the grinder for
ten minutes without a break. Avoid using the grinder continuously.
●Since vibration is felt more strongly under colder conditions, it is advisable to keep your hands
warm and to regularly move your hands and fingers.
●Keep the fastening flanges and abrasive wheels in good mechanical order and replace them if
they are worn or deformed.
●Do not hold the work piece or the machine too tightly in use and do not exert excessive pressure
on the abrasive wheel.
●Worn or defective abrasive wheels must be disposed of according to the relevant national or
international regulations.
●Bear in mind that the abrasive wheels can be contaminated by the grinding process or grinding
swarf.

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●Abrasive wheels that have been disposed must be destroyed to prevent them from being
reused.
●If they are provided, use spacers between the abrasive wheel and the chucking flange.
●Do not do the clamping device up too tightly.
●Never remove the guards of the machines and ensure that they are in good condition and
applied properly.
●Only start the machine when there is no contact between the work piece and the abrasive wheel.
●Avoid mechanical damage to the abrasive wheel due to the application of force or impacts or
heating up.
1.3 Obligations of the owner operator
The owner operator is required to ensure that the people who work with the machine
●are familiar with the underlying regulations on safety at work and accident prevention and have
been instructed in the handling of the machine,
●who have read and understood the safety and warning information in these operation
instructions and in all other documentation associated with the machine,
●are checked at regular intervals regarding safe ways of working.
Have servicing, maintenance and commissioning work done by a trained technician. Any defects
that could affect safety must be dealt with at once.

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1.4 Obligations of the personnel
All persons working with the machine are always required to
●comply with the underlying regulations for safety at work and accident prevention,
●to read and comply with the safety and warning information given in these operation instructions.
1.5 Warranty and liability
If nothing is explicitly stated to the contrary, our "General Terms and Conditions of Sales and
Delivery" shall apply. Warranty and liability claims arising from injury to persons or damage to assets
are hereby excluded if they are due to one or more of the following causes;
●Inappropriate use of the machine
●Incorrect assembly, starting up, operation and maintenance of the machine
●Operation of the machine with defective safety devices or incorrectly applied or non-functional
safety and protective devices.
●Failure to comply with the information given in the operation instructions regarding transport,
storage, assembly, commissioning, operation, maintenance and equipping of the machine
●Making constructional changes or adjustments to the machine that go beyond its normal
intended purpose
●Inadequate monitoring of parts that are subject to wear
●Repairs, inspections or maintenance work that are carried out incorrectly
●Catastrophic failures due to foreign bodies and instances of force majeure.
1.6 Explanation of the symbols
The ope
ration instructions must have been read before starting work and
are to be followed exactly in use.
DANGER
Warning of direct danger to people. Failure to comply can result in severe
or even fatal injuries.

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Lubricants, coolants and cleaners that are a hazard to the environment must be
disposed of safely!
NOTE
Important or additional information on the machine or the documentation.
Eye protection must be used or safety glasses must be worn.
Ear protection must be worn.
Warning of hand injuries.
Warning: Keep your hands away from places that have this warning sign!
There is a danger that your hands could be crushed, drawn in or otherwise injured.
ESD-protected area
The component can be destroyed by an electrostatic discharge.
Only have maintenance and repair work done on hydraulic, electrical and
pneumatic equipment by suitably trained persons and disconnect the electrical
machines from the power source!
Depressurize the hydraulic and pneumatic equipment of the machine before
carrying out any maintenance or repair work!
Change the hoses at regular intervals as part of preventive servicing, even if no
damage is visible! (Follow the details of the manufacturer.)
Used oil

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Before starting up after maintenance or repair work
●check that all screw connections have been done up tightly
●and ensure that any tank covers, screens or filters have been put back in
place
Ensure after finishing the maintenance or repair work and before starting
production again that
●all the materials, tools and other equipment that was required for the
maintenance or repair work has been removed from the working area of the
machine.
●any liquids that may have escaped have been removed
●all the safety devices of the machine function properly.
1.7 Complying with the environmental protection regulations
Comply with the legal requirements for avoiding waste and proper
recycling/disposal in all work on the machine.
Especially when carrying out installation, maintenance and repair work,
substances that are a hazard to water such as
●greases and oils
●hydraulic oils
●coolants
●cleaners containing solvents
do not pollute the ground or get into the sewer system. These substances must be
stored, transported, collected and disposed of in suitable containers.
2 Intended Use
Grinders for abrasive wheels are used to machine metals, for example, for deburring, smoothing
down weld seams or to machine cast parts.
3 Installation
●Blow out the compressed air line and hose before connecting the machine.
●Ensure that all the lines have sufficiently large cross-sections (see section Technical Data) and
that the lines are not kinked or pinched. The compressed air hoses should only be longer than 3
m in exceptional cases.

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●This LUKAS angle grinder must be operated with oil-free compressed air (see section
Maintenance and Servicing).
●Connect the grinder for use with unoiled air to a filter regulator consisting of a filter with water
separator and pressure regulator as follows:
Air consumption Connection thread
0.05 - 0.5 m
3
/min G 1/4
0.15 - 0.9 m
3
/min G 3/8
0.5 - 1.5 m
3
/min G 1/2
0.8 - 6.0 m
3
/min G 3/4
●Check the flow pressure at the take-off point. The flow pressure must be set to 6.3 bar with the
pressure regulator. A higher flow pressure leads to increased wear. If the pressure is too low the
performance is reduced.
Regarding the quality of the compressed air as per ISO 8573-1, we recommend:
CLASS RESIDUALOIL RESIDUAL DUST RESIDUAL WATER
mg/m3
Particle size
µm
max.
concentration
mg/m3
Pressure
condensation
point °C
max.
concentration
g/m3
4 5 15 8 +3 6
4 Starting Up
Ensure that the machine spindle is shorter than the inside thread of the abrasive wheel.
If the abrasive wheel comes away it can cause injuries. Check that the
abrasive wheel has been correctly and securely attached before starting up.
Only use approved abrasive wheels. Check whether the permissible rotating
speed of the abrasive wheel is greater than that of the grinder.