10
| English
1 609 92A 1EJ | (12.5.16)
Bosch Power Tools
Additional Safety and Working In-
structions
Observe correct mains voltage! The voltage of the pow-
er source must agree with the voltage specified on the
nameplate of the machine. Power tools marked with
230 V can also be operated with 220 V.
Use appropriate detectors to determine if utility lines
are hidden in the work area or call the local utility com-
pany for assistance.
Contact with electric lines can lead
to fire and electric shock. Damaging a gas line can lead to
explosion. Penetrating a water line causes property dam-
age.
Firmly tighten the auxiliary handle, hold the machine
firmly with both hands while working and keep proper
footing and balance at all times.
The machine is securely
guided with both hands.
Secure the workpiece.
A workpiece clamped with clamp-
ing devices or in a vice is held more secure than by hand.
To save energy, only switch the power tool on when using
it.
For drilling without impact in wood, metal, ceramic and
plastic as well as for screwdriving, tools without SDS-plus
are used (e.g., drill bits with cylindrical shank). For these
tools, a keyless chuck or a key type drill chuck are re-
quired.
GBH 2-28 F:
Only use quick change chucks with
3 identi-
fication grooves
(standard delivery scope) or
2 identifi-
cation grooves
(accessory/spare part) – see figure 1,
page 184.
–
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 immediately.
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.
Dust from materials such as lead-containing coatings,
some wood types, minerals and metal can be harmful to
one’s health and cause allergic reactions, lead to res-
piratory 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 working 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 workplace.
Dust 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.
When working with the machine, always hold it firmly
with both hands and provide for a secure stance.
The
power tool is guided more secure with both hands.
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.
The rapid shut-off feature (KickBack Control) provides
better control over the power tool to increase user pro-
tection compared to power tools that do not have Kick-
Back Control. The power tool will switch off if it sud-
denly and unforeseeably rotates around the drilling
axis.
To
restart the machine
, release the On/Off switch and
then actuate again.
Symbols
The following symbols are important for reading and under-
standing 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
GBH 2-28 F: Rotary Hammer
Grey-marked area: Handle
(insulated gripping surface)
Article number
Read all safety warnings and all
instructions
Before any work on the machine itself,
pull the mains plug from the socket out-
let
Wear protective gloves
Always wear ear protection.
Wear safety glasses/goggles
KickBack Control
Keyless drill chuck
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