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| English
Noise/vibration information
Noise emission values determined according to
EN 62841-2-2
.
Typically, the A-weighted noise level of the power tool is:
Sound pressure level
92
dB(A); sound power level
103
dB(A). Uncertainty K =
3
dB.
Wear hearing protection!
Vibration total values a
h
(triax vector sum) and uncertainty K
determined according to
EN 62841-2-2
:
Tightening screws and nuts of the maximum permitted size:
a
h
=
9.5
m/s
2
, K =
1.5
m/s
2
The vibration level and noise emission value given in these
instructions have been measured in accordance with a
standardised measuring procedure and may be used to com-
pare power tools. They may also be used for a preliminary
estimation of vibration and noise emissions.
The stated vibration level and noise emission value repres-
ent the main applications of the power tool. However, if the
power tool is used for other applications, with different ap-
plication tools or is poorly maintained, the vibration level
and noise emission value may differ. This may significantly
increase the vibration and noise emissions over the total
working period.
To estimate vibration and noise emissions accurately, the
times when the tool is switched off or when it is running but
not actually being used should also be taken into account.
This may significantly reduce vibration and noise emissions
over the total working period.
Implement additional safety measures to protect the oper-
ator from the effects of vibration, such as servicing the
power tool and application tools, keeping their hands warm,
and organising workflows correctly.
Assembly
u
Remove the battery from the power tool before carry-
ing out work on the power tool (e.g. maintenance,
changing tool, etc.). The battery should also be re-
moved for transport and storage.
There is risk of injury
from unintentionally pressing the on/off switch.
Battery Charging
u
Use only the chargers listed in the technical data.
Only
these chargers are matched to the lithium-ion battery of
your power tool.
Note:
The battery is supplied partially charged. To ensure
full battery capacity, fully charge the battery in the charger
before using your power tool for the first time.
The lithium-ion battery can be charged at any time without
reducing its service life. Interrupting the charging process
does not damage the battery.
The lithium-ion battery is protected against deep discharge
by the "Electronic Cell Protection (ECP)". When the battery
is discharged, the power tool is switched off by means of a
protective circuit: The application tool no longer rotates.
u
Do not continue to press the On/Off switch after the
power tool has automatically switched off.
The battery
can be damaged.
Removing the battery (see figure A)
To remove the battery
(6)
, press the release button
(5)
and
pull the battery downwards out of the power tool.
Do not
use force to do this.
Changing the Tool
u
Remove the battery from the power tool before carry-
ing out work on the power tool (e.g. maintenance,
changing tool, etc.). The battery should also be re-
moved for transport and storage.
There is risk of injury
from unintentionally pressing the on/off switch.
GDR 120-LI:
Inserting the application tool (see figure B)
Pull the locking sleeve
(2)
forward, guide the application tool
(1)
into the tool holder up to the stop and release the locking
sleeve
(2)
to lock the application tool.
Screwdriver bits
(13)
can be inserted using a universal bit
holder with ball catch
(12)
.
Removing
Pull the locking sleeve
(2)
forward and remove the applica-
tion tool.
GDS 120-LI: (see figure C)
u
When working with an application tool, pay attention
that the application tool is connected securely to the
tool holder.
When the application tool is not securely
connected with the tool holder, it can come off during ap-
plication.
Slide the application tool
(14)
onto the square drive of the
tool holder
(1)
.
Due to the way the system operates, the application tool
(14)
will move around slightly in the tool holder
(1)
; this has
no influence on the function/safety.
Operation
Method of Operation
The tool holder
(1)
(with the application tool) is driven by an
electric motor via a gear and impact mechanism.
The working procedure is divided into two phases:
Screwing in
and
tightening
(impact mechanism in action).
The impact mechanism is activated as soon as the screwed
connection runs tight and load is therefore put on the motor.
The impact mechanism then converts the power of the mo-
tor to steady rotary impacts. When loosening screws or nuts,
the process is reversed.
Starting Operation
Inserting the Battery
Set the rotational direction switch
(7)
to the middle position
to avoid unintentionally switching it on. Insert the charged
1 609 92A 4A8 | (11.09.2020)
Bosch Power Tools
