Bosch GBH 2 PROFI Instrucciones De Servicio página 12

Setting the Drilling Depth (Fig.
With the depth stop 10, the maximum drilling depth t
can be set.
Press the button 8 of the auxiliary handle and insert the
depth stop into the auxiliary handle 9 so that the
grooved side of the depth stop points downward.
Insert the SDS-plus tool to the stop into the tool
holder 1. Otherwise, the freedom of motion of the
SDS tool can lead to an incorrect setting of the drilling
depth.
Pull out the depth stop so far that the distance be-
tween the drill tip and the tip of the depth stop corre-
sponds to the desired drilling depth t.
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 5, 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.
1 619 929 623 • (03.05) T
)
L
)
M
Operating Modes (Fig. A–D)
The operation of the gearbox for each application is
set with the mode selection switch 7:
Drilling
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!
The following table shows how the mode selection
switch 7 and the right/left rotation switch 6 as well as
the on/off switch 5 for regulation the speed are to be
set for the various operating modes (see illustrations
on the fold-out page):
Operating Mode
Hammer drilling in concrete or stone
Drilling in steel or wood
Screw driving
Right rotation
Left rotation
Chiselling only with MV 200
(optional accessory)
Sharpening the Chiselling Tools
(Fig. – )
N P
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.
English–3
Hammer Drilling
Fig.
A
Fig.
B
Fig.
C
Fig.
D
Fig.
A