High Quality Drill Bit Set Hard Rock Drilling Bits Rock ...
Inserted tricon bits 1. This series tricone bit use Sealed roller bearing structure. With rollers arranged in grooves recessed in the cone body, the size of the bearing journal is increased. 2. Thrust bearing surfaces are hardfaced and treated with friction reducing technology. 3. Ball locked cone, suitable for high rotary speed. 3)TCI Tricone bits
Get Price