Bosch GBH 5-40 DCE Professional Manual Original página 19

OBJ_BUCH-491-005.book Page 19 Friday, July 9, 2010 3:27 PM
Switching On/Off in Chiselling Mode
– To start the machine, press the On/Off
switch 5 at the top (I) until it locks.
– To switch off the machine, press the On/Off
switch 5 at the bottom (0) and release it.
For low temperatures, the power tool reaches
the full hammer/impact capacity only after a cer-
tain 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.
When plugging the plug into the socket outlet or
after a power failure, the constant electronic
control automatically sets the highest speed
and impact rate. This ensures working at opti-
mum performance despite too low preadjust-
ment of the thumbwheel 7.
– Select the impact rate with the thumbwheel
7 according to the material.
The data in the following table are recommend-
ed values.
Application
Working roughcast/light
building materials
Removing tiles
Working brick
Working concrete
Bosch Power Tools
Safety Clutch
If the tool insert becomes caught or
jammed, the drive to the drill spindle is in-
terrupted. 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 loosen the tool insert. When switch-
ing the machine on with the drilling tool
jammed, high reaction torques can occur.
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
"Vario-Lock" position (see "Setting the Oper-
ating Mode", page 18).
– Turn the tool holder to the desired chiselling
position.
– Turn the mode selector switch 3 to the "chis-
elling" position. The tool holder is now
locked.
The mode selector switch 3 must always be
locked in the "Chiselling" position when
chiselling.
Working Advice
Before any work on the machine itself, pull
the mains plug.
Vibration Damper
Thumbwheel
Position
The integrated vibration damper reduces occur-
ring vibrations.
The soft grip handle increases the safety against
slipping off and thus provides for a better grip
and handling of the power tool.
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