13
4. Before use
It is essential that the safety precautions print-
ed in these operating instructions are read and observed
before the tool is used.
The SF121-A may be used only with the SFB121
or SFB126 battery.
Before it is used for the first time, it is essential
that a new battery is charged for 24 hours in normal
charging mode or up to 12 hours using the condition-
ing charging mode, thus permitting “forming” of the
battery cells to take place.
At low temperatures: Battery performance drops at low
temperatures. Store the battery at room temperature
when not in use.
At high temperatures: Do not store a battery where it
may be subjected to high temperatures (e.g. exposed
to the sun, at a window, behind a car windscreen or on
a radiator).
Do not completely run down the battery. The cells can
be damaged if the battery is completely discharged.
5. Operation
Insert tool insertion and removal
Use the safety catch
as protection against unin-
tentional switching on during transport or when insert-
ing or removing an insert tool.
Quick-release chuck
An insert tool can be clamped or released without a chuck
key. When the drill driver is switched off by the on-off
control switch, the spindle is locked. This is a help when
opening / tightening the quick-release chuck.
Battery removal
Battery release button
If the battery has to be changed, press in the two release
buttons using two fingers and pull the battery out of the
drill driver.
Battery insertion
Push in the battery as far as it will go. There must be an
audible click.
Only the Hilti SFB121 or SFB126 batteries may be used.
Battery charging
Only the Hilti C 7/24, C 7/36-ACS, SFC7/18, TCU7/36 or
SBC12H battery charger may be used. Please refer to
the charger operating instructions for the charging
process.
electric cables or gas and water pipes are present.
External metal parts of the tool may become live if,
for example, an electric cable is damaged inadvertenly.
This presents a serious risk of electric shock.
3.2.4 Work area
a)
Ensure that the workplace is well lit.
b)
Ensure that the workplace is well ventilated.
Poor-
ly ventilated workplaces may be injurious to the health
due to exposeure to dust.
3.2.5 Personal protective equipment
The user and any other persons in the vicinity must
wear suitable eye protection and protective gloves when
the tool is in use. Breathing protection must be worn
if no dust removal system is used.
Wear
breathing
protection
Wear
protective
gloves
Wear
eye
protection
Printed: 07.07.2013 | Doc-Nr: PUB / 5070618 / 000 / 00
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