Diamond Tip Core Drill Bit and Carbide Inserts

     

                

 

Core Drill Bits    

 

 

Rock Drilling Bits  - Steel Tooth Drill Bits and Tungsten Carbide Insert (TCI) Bits come in both mining and oil field drilling 

                          

Carbide Core Drill Bits 

  

Polycrystalline Diamond Compact or called PDC -  These bits are expensive and used for very fast penetration mostly in shales.   This bit has carbide or man-made industrial diamonds set in fixed blades.  The cutters simply scrape the rock away during drilling, and do not rotate and grind the way the cones of a tri-cone bit do.