Barrel Cracking
Too much feed pressure. (Remedy: Back off on pressure.)
Segment too hard for material being drilled. (Remedy: Use bit with softer segment.)
Segment Cracking and Loss of Segments
Bit is too hard for material being drilled. (Remedy: Use softer bit if possible, increase motor RPM)
Machine setup is not rigid. (Remedy: Tighten anchor, check vacuum system.)
Start-up to brutal. (Remedy: Always start drilling gently.)
Jamming of the Core Bit
Loose drilling machine. (Remedy: Secure the drilling machine firmly.)
Broken core of concrete, reinforcing steel in the hole. (Remedy: Realigning.)
Lack of water. (Remedy: Supply sufficient water and work the core free without force.)
Loss of side clearance of segment. (Remedy: Check the side clearance of the segment. If too little, change the bit.)
