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3. Rotate the core bit as far as it will go.
4. Pull the core bit out of the chuck.
5. Tilt the core bit slightly away from the imaginary extension of the chuck axis.
6. Pull the core bit out of the water collector.
7. Hold the core bit securely and shake it until the core falls out through the connection end towards the
rear. If parts of the core remain stuck in the core bit, tap the end of core bit vertically downwards against
a soft object (wood or plastic) or use a thin rod (e.g. the depth gauge) to push out the core.
8. Close the chuck locking lever.
6.6 Removing the core from the hole
1. While rotating it slightly, push the core breaking tool into the hole as far as it will go.
Note
Check that the diameter of the core breaking tool (optional accessory) matches the diameter of
the core bit used.
2. Break the core by applying slight lateral pressure to the core breaking tool.
3. Pull the broken core out of the hole with the core breaking tool.
4. Use a rule to measure the hole depth actually reached.
6.7 Disposal of drilling slurry
1. Collect the drilling slurry (e.g. using a wet/dry industrial vacuum cleaner).
2. Allow the drilling slurry to settle and dispose of the solid material at a construction waste disposal site.
Note
The addition of a flocculent may accelerate the separation process.
3. The remaining drilling water (alkaline, pH value > 7) must be neutralized by the addition of an acidic
neutralizing agent or diluted with a large volume of water before it is allowed to flow into the sewerage
system.
7 Care and maintenance
WARNING
Danger of electric shock!
Carrying out care and maintenance while the supply cord is connected to
the power outlet presents a risk of serious injuries including burns.
▶
Always unplug the supply cord before carrying out all care and maintenance tasks.
Care
• Carefully remove any dirt that may be adhering to surfaces.
• Clean the cooling air slots carefully with a dry brush.
• Use only a slightly damp cloth to clean the casing. Do not use cleaning agents containing silicone as
these may attack the plastic parts.
Care of accessory tools (e.g. core bits) and metal parts
▶
Remove any dirt that may be adhering to the item.
▶
Protect the surfaces of accessory tools and the chuck from corrosion by rubbing these items with an oily
cloth from time to time.
▶
Always keep the connection end clean and lightly oiled.
Maintenance
WARNING
Danger of electric shock!
Improper repairs to electrical components may lead to serious injuries
including burns.
▶
Repairs to the electrical section of the tool or appliance may be carried out only by trained electrical
specialists.
• Check all visible parts and controls for signs of damage at regular intervals and make sure that they all
function correctly.
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Summary of Contents for DD 30-W
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