Dust/Chip Extraction; Starting Operation - Bosch GBH 11 DE Professional Manual Original

OBJ_BUCH-58-003.book Page 18 Tuesday, August 24, 2010 11:14 AM
18 | English
Inserting (see figure A)
– Clean and lightly grease the shank end of the
tool.
– Insert the tool in a twisting manner into the
tool holder until it latches itself.
– Check the latching by pulling the tool.
Removing (see figure B)
– Push back the locking sleeve 2 and remove
the tool.

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 reac-
tions 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 con-
nection with wood-treatment additives (chro-
mate, 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.
Operation

Starting Operation

Observe correct mains voltage! The voltage
of the power source must agree with the
voltage specified on the nameplate of the
machine. Power tools marked with 230 V
can also be operated with 220 V.
Setting the Operating Mode
The operating mode of the power tool is select-
ed with the mode selector switch 4.
Note: Change the operating mode only when the
machine is switched off! Otherwise, the ma-
chine can be damaged.
1 609 929 V44 | (24.8.10)
– Press and hold the unlocking button 3 and
turn the mode selector switch 4 to the re-
quired position.
Position for hammer drilling
When the drilling tool does not
immediately rotate upon
switching on, allow the
machine to run slowly until
the drilling tool rotates.
Vario-Lock position for adjust-
ment of the chiselling position
Position for chiselling
Switching On and Off
– To start the machine, press the On/Off
switch 5 and keep it pressed.
– To switch off the machine, release the
On/Off switch 5.
For low temperatures, the machine reaches the
full hammer/impact capacity only after a certain
time.
This start-up time can be shortened by striking
the inserted tool insert against the floor one
time.
Setting the Speed/Impact Rate
The electronic control enables stepless speed
and impact preselection in accordance with the
material to be worked.
The constant electronic control keeps the prese-
lected speed and impact rate nearly constant
between no-load and load conditions.
The maximum hammering capacity is achieved
when the thumbwheel 7 is set to position "6".
For lower speed settings, the hammering capac-
ity is lower due to technical reasons.
Bosch Power Tools