Bosch GWB 10,8-LI Professional - Manual (Page 14)

14 | English
1 609 92A 00F | (18.12.12) Bosch Power Tools
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
materials to be worked.
 Prevent dust accumulation at the workplace. Dusts can
easily ignite.
Operation
Starting Operation
Inserting the battery
 Use only original Bosch lithium ion batteries with the
voltage listed on the nameplate of your power tool. Using
other batteries can lead to injuries and pose a fire hazard.
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 3 to the centre position in
order to avoid unintentional starting. Insert the charged bat-
tery 8 into the handle so that it can be felt to engage and faces
flush against the handle.
Reversing the rotational direction (see figure C)
The rotational direction switch 3 is used to reverse the rota-
tional direction of the machine. However, this is not possible
with the On/Off switch 4 actuated.
Right Rotation: For drilling and driving in screws, push the
rotational direction switch 3 left to the stop.
Left Rotation: For loosening or unscrewing screws, push the
rotational direction switch 3 right to the stop.
Switching On and Off
To start the machine, press the On/Off switch 4 and keep it
pressed.
The power light 1 lights up when the On/Off switch 4 is slightly
or completely pressed, and allows the work area to be illumi-
nated when lighting conditions are insufficient.
To save energy, only switch the power tool on when using it.
To switch off the machine, release the On/Off switch 4.
Adjusting the Speed
The speed of the switched on power tool can be variably ad-
justed, depending on how far the On/Off switch 4 is pressed.
Light pressure on the On/Off switch 4 results in a low rotation-
al speed. Further pressure on the switch results in an increase
in speed.
Fully automatic spindle locking (Auto-lock)
When the On/Off switch 4 is not pressed, the drill spindle and
thus the tool holder are locked.
This enables screws to be screwed in, even when the battery is
empty and allows for the machine to be used as a screwdriver.
Run-on Brake
When the On/Off switch 4 is released, the chuck brakes to a
stop, thus preventing the run-on of the tool.
When driving in screws, wait until the screw is screwed in
flush with the material and then release the On/Off switch 4.
By doing so, the head of the screw does not penetrate into the
material.
Battery Charge-control Indication
The battery charge-control indicator 6 consists of three green
LEDs, and indicates the charge condition of the battery for a
few seconds when the On/Off switch 4 is pressed halfway or
fully.
Temperature Dependent Overload Protection
When using as intended for, the power tool cannot be subject
to overload. When the load is too high or the allowable battery
temperature of 70 °C is exceeded, the electronic control
switches off the power tool until the temperature is in the op-
timum temperature range again.
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.
Angle Selection of Drill Head (see figure D)
The drill head can be locked in 5 different angle positions.
Push the release button 5 and swivel the tool head to the re-
quired position. Then, let go of the release button 5 again.
 Before starting operation, check if the drill head is
locked in the respective angle position. Danger of injury.
Working Advice
 Apply the power tool to the screw only when it is
switched off. Rotating tool inserts can slip off.
After longer periods of working at low speed, allow the ma-
chine to cool down by running it for approx. 3 minutes at max-
imum speed with no load.
For drilling in metal, use only perfectly sharpened HSS drill
bits (HSS=high-speed steel). The appropriate quality is guar-
anteed by the Bosch accessories program.
Before screwing larger, longer screws into hard materials, it is
advisable to predrill a pilot hole with the core diameter of the
thread to approx.
2 /
3
of the screw length.
LED Capacity
Continuous lighting 3 x green ≥ 2/3
Continuous lighting 2 x green ≥1/3
Continuous lighting 1 x green < 1/3
Flashing light 1 x green Reserve
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