Designed to bore dry holes through hard rock or concrete-- even when driven by a low-power drill--a steel bit produced by NASA researchers picks up its own cuttings and stores them in a closed chamber right behind the cutting head. Teeth mounted on terraces machined into the bit face cut into the rock. The terraces are machined with their surfaces at an angle rather than perpendicular to the drill axis. Spiral grooves that intersect the terraces collect chips swept up by small teeth. The cuttings then move along the grooves and into the storage chamber. By tapering the grooves from the chamber outward, the designers made the bit's motion work to push cutting along. Besides its use in holing through hard materials without the mess of flushing fluids, NASA sees the bit as a boon in soil sampling work. The storage chamber brings up pure samples of rock from any depth the unique bit can penetrate.

  • Corporate Authors:

    Conover-Mast Publications, Incorporated

    205 East 42nd Street
    New York, NY  United States  10017
  • Publication Date: 1965-9

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Filing Info

  • Accession Number: 00263817
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 9 1975 12:00AM