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Full Round Crown
General purpose core bit. Performs well in a wide range of rock materials. Available in all commercial sizes.
Taper Crown
Ideal for coring in soft to medium hard rock. Used for conventional or wire line core bits.
Multi-Air & Fluid Crown
Generally used for fast cooling of the bit when coring medium-hard rock with air or heavy mud circulation.
Strip Diamond Reamer
Four equally divided diamond inserts for soft rock applications.
Concave Crown
Special concave crown on non-coring bits. Used for wedging operations or for drilling blind holes in shales or limestone.
Semi-Round Crown
Good all-around core bit. Performs well in hard rock. Also used in wire line core bits for drilling solid formations.
Multi-Step Crown
Usually selected for core drilling hard rock with wire line core barrels.
Special pilot crown on non-coring bits. Used for drilling drain holes, powder holes, or redrilling grouted holes for pressure tests.
Semi-Flat Crown
Usually used for drilling soft, unconsolidated rock conditions.
Bottom Discharge Crown
Designed to minimize water contact with core, especially in soft rock coring.
Ring Diamond Reamer
Multi-spaced strips of diamonds used for long life in hard rock applications.
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