Changing The Tool - Bosch GBH 3-28 E PROFESSIONAL Instrucciones De Servicio

OBJ_BUCH-188-001.book Page 18 Wednesday, September 13, 2006 4:55 PM

Changing the Tool

With the SDS-plus tool holder, simple and convenient
tool changing is possible without additional aids.
As a requirement of the system, the SDS-plus drilling
tool can move freely. This causes a certain radial run-
out at no-load, which has no effect on the accuracy of
the drill hole, as the drill bit centres itself upon drilling.
The dust protection cap 2 largely prevents the entry of
drilling dust into the tool holder during operation.
When inserting the tool, take care that the dust pro-
tection cap 2 is not damaged.
A damaged dust protection cap should be
changed immediately. We recommend hav-
ing this carried out by an after-sales service.
Inserting SDS-plus Drilling Tools (see figure D)
Clean and lightly grease the shank end of the tool.
Insert the tool in a twisting manner into the tool holder
until it latches itself.
Check the latching by pulling the tool.
Removing SDS-plus Drilling Tools
(see figure E)
Push back the locking sleeve 3 and remove the tool.
Inserting Drilling Tools without SDS-plus
(GBH 3-28 FE) (see figure F)
Note: Do not use drilling tools without SDS-plus for
hammer drilling! Drilling tools without SDS-plus as
well as the tool holder are damaged when used for
hammer drilling.
Insert the keyless replacement chuck 13.
Firmly hold the retaining ring of the keyless replace-
ment chuck 13. Open the keyless replacement chuck
by turning the front sleeve in the direction of the sym-
bol " ".
Insert the drilling tool into the keyless replacement
chuck 13. Firmly hold the retaining ring of the keyless
replacement chuck 13 and turn the front sleeve in the
direction of the symbol "
Set the selector switch 6 to the "Drilling" symbol.
Removing Drilling Tools without SDS-plus
(GBH 3-28 FE) (see figure F)
Firmly hold the retaining ring of the keyless replace-
ment chuck 13. Open the keyless replacement chuck
by turning the front sleeve in the direction of the sym-
bol " ".
Remove the drilling tool.
Inserting Drilling Tools without SDS-plus
(GBH 3-28 E)
Note: Do not use drilling tools without SDS-plus for
hammer drilling! Drilling tools without SDS-plus as
well as the tool holder are damaged when used for
hammer drilling.
18 | English
Insert the key type drill chuck 11.
Open the key type drill chuck 11 by turning until the
tool can be inserted. Insert the tool.
Insert the chuck key into the corresponding holes of
the key type drill chuck 11 and clamp the tool uni-
formly.
Set the selector switch 6 to the "Drilling" symbol.
Removing Drilling Tools without SDS-plus
(GBH 3-28 E)
Turn the sleeve of the key type drill chuck 11 with the
drill chuck key in anticlockwise direction until the drill-
ing tool can be removed.
Dust Extraction with the Dust Extrac-
tion Attachment (Accessory)
Mounting the Dust Extraction Attachment
(see figure G)
For dust extraction, the dust extraction attachment
(accessory) is required. When drilling, the dust extrac-
tion attachment retracts so that the attachment head
is always close to the surface at the drill hole.
Press the button for depth stop adjustment 5 and
remove the depth stop 9. Press button 5 again and
insert the dust extraction attachment into the auxiliary
handle 8 from the front.
Connect an extraction hose (diameter 19 mm, acces-
sory) to the extraction sleeve 16 of the dust extraction
attachment.
The vacuum cleaner must be suitable for the material
being worked.
When vacuuming dry dust that is especially detrimen-
tal to health or carcinogenic, use a special vacuum
cleaner.
Adjusting the Drilling Depth on the Dust Extrac-
tion Attachment (see figure H)
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. Otherwise, the movability of the
SDS-plus drilling tool can lead to incorrect adjustment
of the drilling depth.
Loosen the wing bolt 20 on the dust extraction attach-
ment.
Without switching the power tool on, apply it firmly to
the drilling location. The SDS-plus drilling tool must
face against the surface.
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