Helpful Tips on Using Core Bits

Barrel Cracking

1. Too much feed pressure. (Remedy: Back off on pressure.)

2. Segment too hard for material being drilled. (Remedy: Use bit with softer segment.)

Segment Cracking and Loss of Segments

1. Bit is too hard for material being drilled. (Remedy: Use softer bit if possible, increase motor RPM)

2. Machine setup is not rigid. (Remedy: Tighten anchor, check vacuum system.)

3. Start-up to brutal. (Remedy: Always start drilling gently.)

Jamming of the Core Bit

1. Loose drilling machine. (Remedy: Secure the drilling machine firmly.)

2. Broken core of concrete, reinforcing steel in the hole. (Remedy: Realigning.)

3. Lack of water. (Remedy: Supply sufficient water and work the core free without force.)

4. Loss of side clearance of segment. (Remedy: Check the side clearance of the segment. If too little, change the bit.)