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OBJ_DOKU-22801-001.fm Page 12 Friday, October 8, 2010 8:06 AM
12 | English
Firmly tighten the auxiliary handle, hold the
machine firmly with both hands while work-
ing and keep proper footing and balance at
all times. The machine is guided more secure
with both hands.
Secure the workpiece. A workpiece clamped
with clamping devices or in a vice is held
more secure than by hand.
For drilling without impact in wood, metal,
ceramic and plastic as well as for screwdriv-
ing, tools without SDS-plus are used (e.g.,
drills with cylindrical shank). For these tools,
a keyless chuck or a key type drill chuck are
required.
GBH 2-28 DFV: Only use quick change
chucks with 3 identification grooves (stand-
ard delivery scope) or 2 identification
grooves (accessory/spare part) – see
figure 1, page 196.
– The quick change chuck is automatically
locked. Check the locking effect by pulling
the quick change chuck.
Inserting SDS-plus drilling tools: Check the
latching by pulling the tool.
Replace a damaged dust protection cap im-
mediately. The dust protection cap largely
prevents the penetration of drilling dust into
the tool holder during operation. When in-
serting the tool, pay attention that the dust
protection cap is not damaged.
Symbols
The following symbols are important for reading and understanding the operating instructions.
Please take note of the symbols and their meaning. The correct interpretation of the symbols will
help you to use the machine in a better and safer manner.
Symbol
Meaning
GBH 2-28 D/
GBH 2-28 DV/
GBH 2-28 DFV:
Rotary Hammer
Grey-marked area: Handle (in-
sulated gripping surface)
1 619 929 877 | (8.10.10)
Dusts from materials such as lead-contain-
ing coatings, some wood types, minerals
and metal can be harmful to one's health
and cause allergic reactions, lead to respi-
ratory infections and/or cancer. Materials
containing asbestos may only be worked by
specialists.
– As far as possible, use a dust extraction
system suitable for the material.
– 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.
Prevent dust accumulation at the work-
place. Dusts can easily ignite.
If the application tool should become
blocked, switch the machine off. Loosen
the application tool.
Before switching on the power tool, make
sure that the application tool moves freely.
When switching on with a blocked drilling
tool, high torque reaction can occur.
Always wait until the machine has come to
a complete stop before placing it down. The
tool insert can jam and lead to loss of control
over the power tool.
Symbol
Meaning
Article number (10-digit)
Bosch Power Tools
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