Bosch GTB 12V-11 Professional Manual Original página 13

OBJ_BUCH-2903-001.book Page 13 Tuesday, July 19, 2016 12:20 PM
Identify additional safety measures to protect the operator
from the effects of vibration such as: maintain the tool and the
accessories, keep the hands warm, organisation of work pat-
terns.
Assembly
Battery Charging
 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.
Observe the notes for disposal.
Removing the battery
– To remove the battery 7, press the unlocking buttons 6 and
pull the battery out of the machine to the rear. Do not ex-
ert any force.
Changing the Tool (see figure A)
 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.
Pull off the screwing-depth stop 4 toward the front. Pull out
the screwdriver bit 1. If required, the universal bit holder 11
can also be pulled off and replaced.
An auxiliary tool can be used to remove the screwdriver bit or
universal bit holder.
After changing the tool, reattach the screwing-depth stop 4.
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 5 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.
Bosch Power Tools
Reversing the rotational direction
The rotational direction switch 5 is used to reverse the rota-
tional direction of the machine. However, this is not possible
with the On/Off switch 10 actuated.
Rotate clockwise: Move the rotational direction switch 5
on both sides up to the stop into position
Rotate anticlockwise: Move the rotational direction
switch 5 on both sides up to the stop into position
Switching On and Off
To start the machine, press the On/Off switch 10 and keep it
pressed.
The LED 9 lights up when the On/Off switch 10 is halfway or
fully pressed, and enables illumination of the screwing loca-
tion in unfavourable light conditions.
To switch off the machine, release the On/Off switch 10.
To save energy, only switch the power tool on when using it.
Adjusting the Speed
The speed of the switched-on power tool can be variably ad-
justed, depending on how far the On/Off switch 10 is
pressed.
Light pressure on the On/Off switch 10 results in a low rota-
tional speed. Further pressure on the switch results in an in-
crease in speed.
Adjusting the Screw-in Depth (see figure B)
With the adjustment sleeve 3, the screw-in depth of the screw
head into the workpiece can be preset in 8 locking steps per
full turn. Each step corresponds with a 0.25 mm change of
the screw-in depth.
Turning the adjustment sleeve 3 in clockwise direction results
in a greater screw-in depth; turning in anticlockwise direction
reduces the screw-in depth.
The required setting is best determined by testing.
Temperature Dependent Overload Protection
In normal conditions of use, the power tool cannot be over-
loaded. If the power tool is overloaded or not kept within the
permitted battery temperature range, the power output is re-
duced or the power tool is switched off. The power tool will
not run at full power output again until the permitted battery
temperature has been reached.
Protection Against Deep Discharging
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.
Working Advice
 Apply the power tool to the screw only when it is
switched off. Rotating tool inserts can slip off.
Guide the screw toward the screwdriving bit 1. The screw is
held in place by the magnet pull of the universal bit holder 11.
Firmly push the tip of the screw into the material to be
screwed until the screwing-depth stop 4 faces against the
workpiece.
English | 13
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1 609 92A 2PC | (19.7.16)