Bosch Professional GBH 2-28 Series Original Instructions Manual page 10

10 | English
– GBH 2-28 DFV: Insert the SDS plus quick-change
chuck (2).
– Clean and lightly grease the shank of the application tool.
– Insert the application tool into the tool holder while turn-
ing it until it locks automatically.
– Check that it is locked by pulling on the tool.
Removing SDS-plus application tools (see figure F)
– Push the locking sleeve (5) back and remove the applica-
tion tool.
Changing the tool (without SDS plus)
(GBH 2-28 DFV)
Inserting the application tool (see figure G)
Note: Application tools that do not have SDS plus must not
be used for hammer drilling or chiselling. Tools without SDS
plus and their drill chucks are damaged by hammer drilling
or chiselling.
– Insert the keyless quick-change chuck (1).
– Hold the retaining ring (19) of the keyless quick-change
chuck firmly in place. Open the tool holder by turning the
front sleeve (18) until the tool can be inserted. Hold the
retaining ring (19) in place and firmly tighten the front
sleeve (18) by turning it in the direction of the arrow until
you hear it click into place.
– Check that it is seated securely by pulling on the tool.
Note: If the tool holder was unscrewed all the way, a scrap-
ing sound may be heard while retightening the tool holder
and it may not fully tighten.
In this case, turn the front sleeve (18) in the opposite direc-
tion to the arrow by one full turn. This will allow the tool
holder to be fully tightened.
– Turn the impact/mode selector switch (11) to the
"drilling" position.
Removing the application tool (see figure H)
– Hold the retaining ring (19) of the keyless quick-change
chuck firmly in place. Open the tool holder by turning the
front sleeve (18) in the direction of the arrow until the
tool can be removed.
Dust extraction with the dust extraction
attachment (accessory)
Dust/Chip Extraction
The dust from materials such as lead paint, some types of
wood, minerals and metal can be harmful to human health.
Touching or breathing in this dust can trigger allergic reac-
tions and/or cause respiratory illnesses in the user or in
people in the near vicinity.
Certain dusts, such as oak or beech dust, are classified as
carcinogenic, especially in conjunction with wood treatment
additives (chromate, wood preservative). Materials contain-
ing asbestos may only be machined by specialists.
– Use a dust extraction system that is suitable for the ma-
terial wherever possible.
– Provide good ventilation at the workplace.
1 609 92A 5N7 | (16.03.2020)
– It is advisable to wear a P2 filter class breathing mask.
The regulations on the material being machined that apply in
the country of use must be observed.
Avoid dust accumulation at the workplace. Dust can
u
easily ignite.
Fitting the dust extraction attachment (see figure I)
For dust extraction, the dust extraction attachment (access-
ory) is required. When drilling, the dust extraction attach-
ment retracts so that the attachment head is always close to
the surface at the drill hole.
– Press the button for depth stop adjustment (12) and re-
move the depth stop (14). Press the button (12) again
and insert the dust extraction attachment into the auxili-
ary handle (13) from the front.
– Connect an extraction hose (diameter 19 mm, accessory)
to the suction opening (20) of the dust extraction attach-
ment.
The dust extractor must be suitable for the material being
worked.
When extracting dust that is dry, especially detrimental to
health or carcinogenic, use a special dust extractor.
Setting the drilling depth on the dust extraction
attachment (see figure J)
You can also set the required drilling depth X when the dust
extraction attachment is fitted.
– Push the SDS-plus application tool into the SDS-plus tool
holder (3) as far as it will go. Otherwise, the movability of
the SDS-plus drilling tool can lead to incorrect adjustment
of the drilling depth.
– Loosen the wing bolt (24) on the dust extraction attach-
ment.
– Without switching it on, press the power tool firmly
against the surface you wish to drill. The SDS-plus applic-
ation tool must be touching the surface.
– Position the guide tube (25) of the dust extraction attach-
ment in its holder such that the head of the dust extrac-
tion attachment rests on the surface to be drilled. Do not
slide the guide tube (25) further than necessary over the
telescopic tube (23), so that as much as possible of the
scale remains visible on the telescopic tube (23).
– Retighten the wing bolt (24). Loosen the clamping screw
(21) on the depth stop of the dust extraction attachment.
– Slide the depth stop (22) onto the telescopic tube (23)
so that the distance X shown in the illustration matches
your required drilling depth.
– Tighten the clamping screw (21) in this position.
Operation
Products that are only sold in AUS and NZ: Use a resid-
u
ual current device (RCD) with a nominal residual current
of 30 mA or less.
Bosch Power Tools