NOTE
Used to draw attention to an instruction or other
useful information.
1.2 Explanation of the pictograms and other
information
Warning signs
General
warning
Warning:
electricity
Warning:
caustic
substances
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
under no load
Revolutions
per minute
1 These 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 operating instructions.
In these operating instructions, the designation “the
power tool” refers to the SID 121‑A, SIW 121‑A,
SID 144‑A or SIW 144‑A cordless tangential impact
screwdriver with battery fitted.
Location of identification data on the power tool
The type designation can be found on the type iden-
tification plate and the serial number on the side of
the motor housing. Make a note of this data in your
operating instructions and always refer to it when
making an enquiry to your Hilti representative or
service department.
Type:
Serial no.:
2. Description
2.1 Use of the product as directed
The SID 121-A, SIW 121-A, SID 144-A and SIW 144-A are hand-held cordless tangential impact screwdrivers.
They are suitable for driving and removing screws in wood, metal, masonry and concrete.
Working on materials hazardous to the health (e.g. asbestos) is not permissible.
Do not use the battery as a power source for other unspecified appliances.
Modification of the power tool is not permissible.
To avoid the risk of injury, use only genuine Hilti accessories and insert tools.
The power tool should not be used for applications that require a precise torque. For applications which require
a precise torque or where only a special limited torque is permitted, there is a risk of over-tightening and
en
2
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