Diamond Core Drill Bit Stuck

This is how to avoid getting your diamond core drill bit stuck in material you’re cutting:

• Always use water
• Clean the core hole often
• Don’t try removing too large a core.
• Good water pressure will help flood the sediments up to the top of the hole and relieves the pressure on the core bit.

If you have the core drill bit stuck on drill, use channellock pliers on the core and put a spanner on the drill shank. Turn counter-clockwise and it should free the core. Spray WD-40 lubricant if this is proving a challenge and allow to penetrate before trying to free the core.