Hilti AG 125-A22, Operating Instructions Manual

Page: 35 / 342

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
securely. Switch off the power tool immediately
if significant vibration or any other faults are
noticed. 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
mounting hole.
g) If the grinding disc (or cup wheel, etc.) is
equipped with a threaded insert, check that the
threaded section is long enough to take up the
length of 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
yourself or other persons or by igniting inflam-
mable substances. Adjust the position of the
disc guard accordingly.
k) When working in dusty conditions, check to
ensure that the cooling air openings remain
unobstructed. 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.
b) Dirty or dusty power tools that have been used
frequently for work on conductive materials
should be checked at regular intervals at a
Hilti Service Center.
Under unfavorable circum-
stances, dampness or dust adhering to the sur-
face 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 batter-
ies.
b) Do not expose batteries to high temperatures or
fire.
This presents a risk of explosion.
c) Do not disassemble, squash or incinerate bat-
teries and do not subject them to temperatures
over 80°C.
A risk of fire, explosion or injury
through contact 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 in-
dicate that it is faulty. Place the tool at a location
where there is no risk of causing a fire (at least 3
meters away from flammable materials), where
it can be kept under observation and allowed to
cool. Contact Hilti Service after the battery has
been allowed to cool.
5.3.5 Work area safety
a) Ensure that the workplace is well lit.
b) Ensure that the workplace is well ventilated.
Exposure to dust at a poorly ventilated workplace
may result in damage to the health.
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Printed: 31.07.2012 | Doc-Nr: PUB / 5071441 / 000 / 00