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Tapered core bit
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
A core bit having a conical diamond-inset crown surface tapering from a borehole size at the bit face to the next larger borehole size at its upper, shank, or reaming-shell end, as from ex to ax, or bx to nx.
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Taper-type dropper, английский
A device by which a straight-type wedge can be attached to a diamond-drill rod, lowered, and set in a borehole.
Swivel coupling, английский
A coupling that gives complete rotary freedom to a deflecting wedge-setting assembly.
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