Bosch GSR 120 Professional Original Instructions Manual page 7

OBJ_BUCH-3067-001.book Page 7 Friday, November 4, 2016 4:32 PM
Cordless Drill/Driver
Max. torque for hard/soft screw-
driving application according to
ISO 5393
Max. drilling dia.
– Steel
– Wood
Max. screw dia.
Chuck clamping range
Drill spindle thread
Weight according to
EPTA-Procedure 01:2014
Permitted ambient temperature
– during charging
**
– during operation and during
storage
Recommended batteries
Recommended chargers
* depending on the battery pack being used
** 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 7 press the unlocking buttons 6 and
pull out the battery downwards. Do not exert any force.
Observe the notes for disposal.
Changing the Tool (see figure B)
Hold the rear sleeve 3 of the keyless chuck 1 tight and turn the
front sleeve 2 in rotation direction , until the tool can be in-
serted. Insert the tool.
Hold the rear sleeve 3 of the keyless chuck 1 tight and firmly
turn the front sleeve 2 in rotation direction  by hand.
The locking is released again to remove the tool when the
front sleeve 2 is turned in the opposite direction.
Bosch Power Tools
Replacing the Drill Chuck
GSR 120
Removing the Securing Screw (see figure C)
The keyless chuck 1 is secured with a securing screw 14
Nm 28/11*
against unintentional loosening from the drill spindle. Com-
pletely open the keyless chuck 1 and unscrew the securing
screw 14 in rotation direction . Please note that the se-
mm 6
curing screw has a left-hand thread.
mm 19
Removing the Drill Chuck (see figure D)
mm 7
Clamp the short end of a hex key 15 into the keyless chuck 1.
mm 0.8 – 10
Place the machine on a stable surface (e. g. a workbench).
3/8"
Hold the machine firmly and loosen the keyless chuck 1 by
turning the hex key 15 in rotation direction . Loosen a tight-
kg 1.2
seated keyless chuck by giving the long end of the hex key 15
a light blow. Remove the hex key from the keyless chuck and
°C 0...+45
completely unscrew the keyless chuck.
Mounting the Drill Chuck (see figure E)
°C –20...+50
The keyless chuck is mounted in reverse order.
GBA 10,8V...O-.
The drill chuck must be tightened with a tightening
GBA 10,8V...M-.
torque of approx. 1.5–2.0 Nm.
AL 11..CV
Screw the securing screw 14 in anti-clockwise direction into
the opened keyless chuck. Always use a new securing screw,
as the threads are covered with a thread-locking compound
that loses its effect after multiple usage.
Dust/Chip Extraction
 Dusts from materials such as lead-containing coatings,
some wood types, minerals and metal can be harmful to
one's health. Touching or breathing-in the dusts can cause
allergic reactions and/or lead to respiratory infections of
the user or bystanders.
Certain dusts, such as oak or beech dust, are considered
as carcinogenic, especially in connection with wood-treat-
ment additives (chromate, wood preservative). Materials
containing asbestos may only be worked by specialists.
– Provide for good ventilation of the working place.
– It is recommended to wear a P2 filter-class respirator.
Observe the relevant regulations in your country for the mate-
rials to be worked.
 Prevent dust accumulation at the workplace. Dusts can
easily ignite.
Operation
Starting Operation
Inserting the battery
Note: Use of batteries not suitable for the machine can lead to
malfunctions of or cause damage to the power tool.
Set the rotational direction switch 8 to the centre position in
order to avoid unintentional starting. Insert the charged bat-
tery 7 into the handle so that it can be felt to engage and faces
flush against the handle.
English | 7
1 609 92A 1UW | (4.11.16)