Bosch GBH 2-28 D, Operating Instructions Manual

F 000 622 356 | 08.2011 

            Bosch Power Tools

     English | 

22

utility company 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 damage.

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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.

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Secure the workpiece. A workpiece clamped with 

clamping devices or in a vice is held more secure than 

by hand.

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For drilling without impact in wood, metal, ceramic 

and plastic as well as for screwdriving, 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.

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Inserting SDS-plus Drilling Tools: Check the latching 

by pulling the tool.

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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 inserting the tool, pay 

attention that the dust protection cap is not damaged.

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Dusts 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 respiratory 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.

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Prevent dust accumulation at the workplace. Dusts 

can easily ignite.

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If the application tool should become blocked, 

switch the machine off. Loosen the application 

tool.

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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.

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.