Bosch Professional GBH 7-46 DE Manual Original página 13

OBJ_BUCH-414-003.book Page 13 Thursday, July 28, 2011 3:24 PM
Assembly
Before any work on the machine itself, pull the mains
plug.
Auxiliary Handle
Operate your machine only with the auxiliary handle 6.
The auxiliary handle 6 can be set to any position for a secure
and low-fatigue working posture.
– Turn the bottom part of the auxiliary handle 6 in counter-
clockwise direction and swivel the auxiliary handle 6 to the
desired position. Then retighten the bottom part of the
auxiliary handle 6 by turning in clockwise direction.
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.
– 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
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-treatment
additives (chromate, wood preservative). Materials contain-
ing 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.
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 with the
mode selector switch 3.
Bosch Power Tools
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 requested 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 adjustment of the
chiselling position
Position for chiselling
In the "chiselling" position, the impact rate preselected with
the thumbwheel 5 is automatically increased when switching
on; this causes the power tool to operate with increased ca-
pacity when chiselling.
Switching On/Off in Drilling Mode
– 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.
Switching On/Off in Chiselling Mode
– To start the machine, press the On/Off switch 4 at the top
(I) until it locks.
– To switch off the machine, press the On/Off switch 4 at the
bottom (0) and release it.
For low temperatures, the power tool reaches the full ham-
mer/impact capacity only after a certain 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 preselected speed
and impact rate nearly constant between no-load and load
conditions.
The maximum hammering capacity is achieved when the
thumbwheel 5 is set to position "6". For lower speed settings,
the hammering capacity is lower due to technical reasons.
– Select the speed with the thumbwheel 5 according to the
material.
The data in the following table are recommended values.
English | 13
1 609 929 V45 | (28.7.11)