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97-113 PDC Core Drill Bits (Double Rib)
97-113 PDC Core Drill Bits (Double Rib)

97-113 PDC Core Drill Bits (Double Rib)

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Reference Table for PDC Core Drill Bits

Rock Hardness category Soft Medium-soft Medium Medium-hard Hard Harder Hardest
Drillability level 1 2 3 4 5 6 7 8 9 10 11 12
Praetz hardness F≤10 10 < F≤1515 < F≤20
Rock Type Sandstone, Limestone, Marble, Dolomite, Pyrite, Unsturdy Granite, Shale Granite, Hard Sandstone, Conglomerate, Limestone, Quartz Veins  Hard granite, Quartzite, Basalt, Igneous Rock
PDC Core Drill Bits Ordinary type
  ♦ ♦ ♦ ♦ ♦ ♦ ♦


Reinforced type
  ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦

High-strength type
  ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦
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