Do you drill concrete fast or slow? - Quora- hilti bit stuck in concrete board ,29/1/2021· Slow. Not really precise that word is it? Concrete should be hard with even harder stone in the mix. Those stones will be harder than the cement/sand binder. Personally a small diameter hole upto 30mm I would use a tungsten carbide tipped drill an...Diamond Core Bits - Hilti United KingdomEasily remove a stuck core bit When the core bit is stuck in the concrete, rotate the barrel to detach it from the X-Change module and back it out of the hole. Easy core removal
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