Method Of Operation; Starting Operation - Bosch GDR Professional 120-LI Notice Originale

OBJ_BUCH-2873-001.book Page 7 Wednesday, April 20, 2016 8:54 AM
Cordless Impact Screwdriver
Bolt size
Max. screw dia.
Tool holder
Weight according to EPTA-Procedure 01:2014
Permitted ambient temperature
– during charging
*
– during operation and during storage
Recommended batteries
Recommended chargers
* Limited performance at temperatures <0 °C
Assembly
Removing the Battery (see figure A)
 Use only the battery chargers listed on the accessories
page. Only these battery chargers are matched to the lith-
ium-ion battery of your power tool.
Note: The battery supplied is partially charged. To ensure full
capacity of the battery, completely charge the battery in the
battery charger before using your power tool for the first time.
The lithium-ion battery can be charged at any time without re-
ducing its service life. Interrupting the charging procedure
does not damage the battery.
The lithium-ion battery is protected against deep discharging
by the "Electronic Cell Protection (ECP)". When the battery is
empty, the machine is switched off by means of a protective
circuit: The inserted tool no longer rotates.
 Do not continue to press the On/Off switch after the
machine has been automatically switched off. The bat-
tery can be damaged.
To remove the battery 6 press the unlocking buttons 5 and
pull out the battery downwards. Do not exert any force.
Observe the notes for disposal.
Changing the Tool
 Before any work on the machine itself (e. g. mainte-
nance, tool change, etc.) as well as during transport
and storage, remove the battery from the power tool.
There is danger of injury when unintentionally actuating
the On/Off switch.
 Regularly clean the power tool's air vents. The motor's
fan will draw the dust inside the housing and excessive ac-
cumulation of powdered metal may cause electrical haz-
ards.
GDR 120-LI:
Inserting (see figure B)
Pull the locking sleeve 2 forward, push the insert tool to the
stop into the tool holder 1 and release the locking sleeve 2 to
lock the insert tool.
Screwdriver bits 13 can be inserted using a universal bit hold-
er with ball lock 12.
Removing
Pull the locking sleeve 2 forward and remove the insert tool.
Bosch Power Tools
GDR 120-LI
mm M4 – M12
mm 8
¼" hexagon socket
kg 1.1
°C 0...+45
°C –20...+50
GBA 12V ...
GAL 12.. CV
GDS 120-LI: (see figure C)
 When working with an application tool, pay attention
that the application tool is connected securely on the
tool holder. When the application tool is not securely con-
nected with the tool holder, it can come off during applica-
tion.
Slide the application tool 14 onto the square drive of the tool
holder 1.
With this system, there will be a slight amount of play around
the application tool 14 after connecting securely to the tool
holder 1; this has no influence on the function/safety.
Operation

Method of Operation

The tool holder 1 with the 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 thus load is put on the motor. In this
instance, the impact mechanism converts the power of the
motor 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 centre position to
protect the power tool against accidental starting.
Insert the charged battery 6 from the front into the base of the
power tool until the battery is securely locked.
Reversing the rotational direction (see figure D)
The rotational direction switch 7 is used to reverse the rota-
tional direction of the machine. However, this is not possible
with the On/Off switch 8 actuated.
Right rotation: For driving in screws and tightening nuts,
press the rotational direction switch 7 through to the left
stop.
Left Rotation: For loosening and unscrewing screws and
nuts, press the rotational direction switch 7 through to the
right stop.
English | 7
GDS 120-LI
M4 – M12
8
 3/8"
1.1
0...+45
–20...+50
GBA 12V ...
GAL 12.. CV
1 609 92A 2SM | (20.4.16)