Bosch GBH 3-28 DRE Professional Notice Originale page 27

OBJ_BUCH-770-003.book Page 26 Tuesday, April 7, 2009 9:51 AM
26 | English
Dust Extraction with the Dust Extrac-
tion Attachment (Accessory)
Dusts from materials such as lead-containing
coatings, some wood types, minerals and
metal can be harmful to one's health. Touch-
ing 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
containing asbestos may only be worked by
specialists.
– Use dust extraction whenever possible.
– Provide for good ventilation of the work-
ing place.
– It is recommended to wear a P2 filter-class
respirator.
Observe the relevant regulations in your
country for the materials to be worked.
Mounting the Dust Extraction Attachment
(see figure J)
For dust extraction, the dust extraction attach-
ment (accessory) is required. When drilling, the
dust extraction attachment retracts so that the
attachment head is always close to the surface
at the drill hole.
Press the button for depth stop adjustment 10
and remove the depth stop 11. Press button 10
again and insert the dust extraction attachment
into the auxiliary handle 12 from the front.
Connect an extraction hose (diameter 19 mm,
accessory) to the extraction sleeve 21 of the
dust extraction attachment.
The vacuum cleaner must be suitable for the
material being worked.
When vacuuming dry dust that is especially
detrimental to health or carcinogenic, use a
special vacuum cleaner.
1 619 929 E56 | (7.4.09)
Adjusting the Drilling Depth on the Dust
Extraction Attachment (see figure K)
The required drilling depth X can also be
adjusted when the dust extraction attachment
is mounted.
Insert the SDS-plus drilling tool to the stop into
the SDS-plus tool holder 3. Otherwise, the mov-
ability of the SDS-plus drilling tool can lead to
incorrect adjustment of the drilling depth.
Loosen the wing bolt 25 on the dust extraction
attachment.
Without switching the power tool on, apply it
firmly to the drilling location. The SDS-plus drill-
ing tool must face against the surface.
Position the the guide pipe 26 of the dust
extraction attachment in its holding fixture in
such a manner that the head of the dust extrac-
tion attachment faces against the surface to be
drilled. Do not slide the guide pipe 26 further
over the telescopic pipe 24 of the dust extrac-
tion attachment than required, so that as much
as possible of the scale 24 on the telescopic
pipe remains visible.
Retighten the wing bolt 25 again. Loosen the
clamping screw 22 on the depth stop of the dust
extraction attachment.
Move the depth stop 23 on the telescopic pipe
24 in such a manner that the clearance X shown
in the figure corresponds with the required
drilling depth.
Tighten the clamping screw 22 in this position.
Bosch Power Tools