Bosch GBH 5-40 D Professional Original Instructions Manual page 12

OBJ_BUCH-2780-002.book Page 12 Monday, October 24, 2016 4:35 PM
12 | English
Changing the Tool
With the SDS-max tool holder, simpler and easier tool chang-
ing is possible without additional aids.
The dust protection cap 1 largely prevents the entry of drilling
dust into the tool holder during operation. When inserting the
tool, take care that the dust protection cap 1 is not damaged.
 A damaged dust protection cap should be changed im-
mediately. We recommend having this carried out by
an after-sales service.
Inserting (see figure A)
– Clean and lightly grease the shank end of the tool.
– Push back the locking sleeve 2 and insert the tool in a twist-
ing manner into the tool holder. Release the locking sleeve
2 again in order to lock the tool.
– Check the latching by pulling the tool.
Removing (see figure B)
– Push back the locking sleeve 2 and remove the tool.
Dust/Chip Extraction
Dust 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 dust can cause allergic
reactions and/or lead to respiratory infections of the user or
bystanders.
Certain dust, such as oak or beech dust, is considered carci-
nogenic, especially in connection with wood-treatment addi-
tives (chromate, wood preservative). Materials containing as-
bestos 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.
Operation
Starting Operation
 Observe correct mains voltage! The voltage of the pow-
er 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 selected using the
mode selector switch 3.
Note: Change the operating mode only when the machine is
switched off! Otherwise, the machine can be damaged.
– Turn the mode selector switch 3 to the desired 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.
1 609 92A 28B | (24.10.16)
Vario-Lock position for adjustment of the
chiselling position
Position for chiselling
Switching On and Off
– To start the machine, press the On/Off switch 4 and keep
it pressed.
– To switch off the machine, release the On/Off switch 4.
For low temperatures, the power tool reaches the full ham-
mer/impact capacity only after a certain time.
To save energy, only switch the power tool on when using it.
Setting the Speed/Impact Rate
The electronic control enables stepless speed and impact
preselection in accordance with the material to be worked.
– Select the impact rate with the thumbwheel 6 according to
the material.
The data in the following table are recommended values.
Application
Working roughcast/light building materials
Removing tiles
Working brick
Working concrete
Overload Clutch
 If the tool insert becomes caught or jammed, the drive
to the drill spindle is interrupted. Because of the forces
that occur, always hold the power tool firmly with both
hands and provide for a secure stance.
 If the power tool jams, switch the machine off and loos-
en the tool insert. When switching the machine on with
the drilling tool jammed, high reaction torques can oc-
cur.
Changing the Chiselling Position (Vario-Lock)
The chisel can be locked in 12 positions. In this manner, the
optimum working position can be set for each application.
– Insert the chisel into the tool holder.
– Turn the mode selector switch 3 to the position "Vario-
Lock" (see "Setting the operating mode", page 12).
– Turn the tool holder to the desired chiselling position.
– Turn the mode selector switch 3 to the position "Chisel-
ling". With this, the tool holder is locked.
 For chiselling, the mode selector switch 3 must always
be set to the position "Chiselling".
Working Advice
 Before any work on the machine itself, pull the mains
plug.
Thumbwheel
Position
1
6
Bosch Power Tools