Maintenance And Cleaning - Bosch GBH 2-24 DFR Instrucciones De Servicio

Dust Vacuuming/Vacuuming Attachment
Dust produced while working can be detrimental to
s
health, inflammable or explosive. Suitable protec-
tion measures are required.
Examples: Some dusts are considered to be carci-
nogenic. Use suitable dust/chip extraction and
wear a dust protection mask.
Light metal dust can burn or explode. Always keep
s
the work place clean since material mixtures are
especially dangerous.
The machine can be connected directly to the socket
of a Bosch all-purpose vacuum cleaner with remote
starting. The vacuum cleaner starts automatically
when the machine is switched on.
Mount the vacuuming attachment (optional accessory)
and connect the vacuum cleaner.
The vacuuming attachment is spring loaded up to the
preselected drilling depth. In this manner, the vacuum-
ing attachment head is always held close to the sur-
face.
Setting the Speed (Fig.
By increasing or decreasing the pressure on the on/off
switch 8, the speed can be continuously controlled
during operation.
Advantages:
– Slow starting of holes, e.g., on smooth surfaces or
tiles
– No sliding off of the drill when stating the hole
– No splintering of the hole.
The speed must be selected according to the operat-
ing mode, the material to be worked and the diameter
of the drill.
See Operating Modes for recommended values.
Operating Modes (Fig. L–Q)
The operation of the gearbox for each application is
set with the mode selection switch 11:
Drilling/ Hammer
Screw Drilling
Driving
For this purpose, press the unlocking button 10 and
set to the desired operating mode.
The operating mode selector switch may be ac-
tuated only at a standstill.
Do not use tools without SDS-plus for hammer
drilling or chiselling!
1 619 929 611 • (03.02) T
)
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Vario-Lock Chiselling
The following table shows how the mode selection
switch 11 and the right/left rotation switch 9 as well as
the on/off switch 8 for regulation the speed are to be
set for the various operating modes (see illustrations
on the fold-out page):
Operating Mode
Hammer drilling inconcrete or stone
Drilling in steel or wood
Screw driving
Right rotation
Left rotation
Chiselling
Chisel Adjustment (Vario-Lock)
The chiselling tool can be turned in the tool holder
(Vario-Lock) to an optimum, fatigue-free working posi-
tion.
Insert the tool. Press the unlocking button 10 and set
the mode selection switch 11 to Vario-Lock (Fig.
Turn the tool holder to the desired position. Thirty six
positions are possible.
Sharpening the Chiselling Tools
(Fig. – )
R T
With sharpened insertion tools, one achieves good
working performance and long service life. Therefore,
sharpen the chisel regularly.
Sharpen the tool on a grinding wheel (e.g. alumina
oxide) with constant water supply.
Take care that the cutting edge does not show signs
of coloration since this affects the hardness of the tool.

Maintenance and Cleaning

Before any work on the machine itself, pull the
s
mains plug.
For safe and efficient working, always keep the ma-
s
chine and the ventilation slots clean.
Clean the tool holder daily.
Replacing the Dust Protection Cap
Damaged dust protection caps should be replaced as
soon as possible since dust that enters the tool holder
can cause malfunctions.
It is recommended that this be performed by
customer service.
English–4
Fig.
L
Fig.
M
Fig.
N
Fig.
O
Fig.
P
).
Q