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  2. Drill bit - Wikipedia

    en.wikipedia.org/wiki/Drill_bit

    An 1/8 inch left-hand drill bit. Left-hand bits are almost always twist bits and are predominantly used in the repetition engineering industry on screw machines or drilling heads. Left-handed drill bits allow a machining operation to continue where either the spindle cannot be reversed or the design of the machine makes it more efficient to run ...

  3. Annular cutter - Wikipedia

    en.wikipedia.org/wiki/Annular_cutter

    An annular cutter (also called a core drill, core cutter, broach cutter, trepanning drill, hole saw, or cup-type cutter) is a form of core drill used to create holes in metal. An annular cutter, named after the annulus shape , cuts only a groove at the periphery of the hole and leaves a solid core or slug at the center.

  4. Hughes Tool Company - Wikipedia

    en.wikipedia.org/wiki/Hughes_Tool_Company

    At its peak during the Texas oil boom, it was a center for manufacturing, design, research, metallurgy, and engineering for oil field technologies. This included the drill bit (well) and tool joint product lines critical for oil and gas drilling, some of the first technologies for ram blast bits for drilling in mines, geothermal drilling , and ...

  5. Magnetic drilling machine - Wikipedia

    en.wikipedia.org/wiki/Magnetic_drilling_machine

    A morse taper 3 arbor equipped magnetic drill machine using taper shank drill bits. The arbor or chuck on a magnetic drill is attached to the motor. It is a type of clamp used to attach the core drills. There are mainly two types of chuck available for the magnetic drill, industrial arbor (manual tightening) and quick change drill chucks. The ...

  6. Drilling - Wikipedia

    en.wikipedia.org/wiki/Drilling

    Drilling is a cutting process where a drill bit is spun to cut a hole of circular cross-section in solid materials. The drill bit is usually a rotary cutting tool, often multi-point. The bit is pressed against the work-piece and rotated at rates from hundreds to thousands of revolutions per minute.

  7. Drill bit sizes - Wikipedia

    en.wikipedia.org/wiki/Drill_bit_sizes

    Number and letter sizes are commonly used for twist drill bits rather than other drill forms, as the range encompasses the sizes for which twist drill bits are most often used. The gauge-to-diameter ratio is not defined by a formula; it is based on—but is not identical to—the Stubs Steel Wire Gauge , which originated in Britain during the ...

  8. US restricts drilling and mining in Alaska wilderness ... - AOL

    www.aol.com/news/us-restricts-drilling-mining...

    (Reuters) -The Biden administration took steps on Friday to limit both oil and gas drilling and mining in Alaska, angering state officials who said the restrictions will cost jobs and make the U.S ...

  9. Brace (tool) - Wikipedia

    en.wikipedia.org/wiki/Brace_(tool)

    Bits used to come in a variety of types but the more commonly used Ridgeway and Irwin-pattern bits also rely on a tip called a snail, which is a tapered threaded screw that pulls the bit forward. The U-shaped handle is a crank. It gives the brace much greater torque than other kinds of hand-powered drills.

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