Working advice

Always use a centering cross (accessory) when drilling.

Start drilling in first gear at a low speed until the core bit rotates in the material without vibrating. Then switch to second gear if necessary.

You should always adjust the contact pressure to the material you are drilling. Drill applying uniform pressure. If necessary, pull the core bit gently out of the drill hole to remove the wet/dry drilling debris from the diamond segments.

  • If the application tool jams or snags, the power transmission to the drill spindle will be interrupted. Always hold the power tool firmly with both hands to withstand the forces this may create and adopt a position with stable footing.

If the overload threshold is exceeded, the power tool will start noticeably pulsating. Reduce the contact pressure until the power tool starts working normally again.

If the contact pressure is not reduced, the power tool will switch off. You will be able to switch the power tool on again straight away, but you should now continue working with a lower contact pressure.

Wet drilling: Once drilling is complete, allow the water to keep flowing for a short while to rinse out the debris between the core bit and the drill core itself.

If the drill core is tightly seated in the core bit, hit the core bit with a piece of soft wood or plastic to loosen the drill core. If necessary, push the drill core out through the shank of the core bit using a rod.

Note: Do not hit the core bit with hard objects, as this may damage or deform it.