Removing And Emptying The Core Bit; Removing The Core From The Hole; Disposal Of Drilling Slurry - Hilti DD 30-W Manual

6.5 Removing and emptying the core bit

1. Unplug the supply cord from the power outlet.
CAUTION
Risk of injury The tool becomes hot as a result of use. It may have sharp edges.
▶ Wear protective gloves when changing the tool.
WARNING
Risk of injury. The drilled-out core, or parts of it, may fall out of the core bit.
▶ Take care to ensure that the core doesn't fall out of the core bit inadvertently. Remove all parts of
the core from the core bit.
2. Open the chuck. To do this, pull the chuck locking lever up as far as it will go.
Note
Hold the machine with the tip of the core bit pointing slightly downwards so that the water
remaining in the core bit can flow out.
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.
Printed: 06.07.2017 | Doc-Nr: PUB / 5283534 / 000 / 05
English 25