Working Advice - Bosch GBH 5-40 DCE Professional Manual Original

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
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.
Bosch Power Tools
All manuals and user guides at all-guides.com
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
– Turn the tool holder to the desired chiselling
– Turn the mode selector switch 3 to the "chis-

Working Advice

Thumbwheel
Position
Vibration Damper
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.
"Vario-Lock" position (see "Setting the Oper-
ating Mode", page 20).
position.
elling" position. The tool holder is now
locked.
The mode selector switch 3 must always be
locked in the "Chiselling" position when
chiselling.
Before any work on the machine itself, pull
the mains plug.
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