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  2. Boring bar - Wikipedia

    en.wikipedia.org/wiki/Boring_bar

    The parts include the body, bar holder and dial screw (graduated micro screw). The body, made of solid stock, has two basic parts. The top part threads or presses into the supporting shank. The lower part (bar holder) is connected via dovetail, T-slots or a smooth notch with an adjustment for bore diameter via the dial screw. As the dial screw ...

  3. Bar stock - Wikipedia

    en.wikipedia.org/wiki/Bar_stock

    Bar stock is widely used in many industries and can be seen in many different industrial processes. These processes include forging, extrusion, machining, and many more.. In forging, billets are heated to high temperatures before a press pushes the workpiece into the shape on the d

  4. Boring (manufacturing) - Wikipedia

    en.wikipedia.org/wiki/Boring_(manufacturing)

    A part's-eye view of a boring bar. Hole types: Blind hole (left), through hole (middle), interrupted hole (right). In machining, boring is the process of enlarging a hole that has already been drilled (or cast) by means of a single-point cutting tool (or of a boring head containing several such tools), such as in boring a gun barrel or an engine cylinder.

  5. Soil nailing - Wikipedia

    en.wikipedia.org/wiki/Soil_nailing

    Solid bars are usually installed into pre-drilled holes and then grouted into place using a separate grout line, whereas hollow bars may be drilled and grouted simultaneously by the use of a sacrificial drill bit and by pumping grout down the hollow bar as drilling progresses. Kinetic methods of firing relatively short bars into soil slopes ...

  6. Parallel (engineering) - Wikipedia

    en.wikipedia.org/wiki/Parallel_(engineering)

    Parallels of different sizes can be used to support a workpiece that doesn't have a flat surface underneath, or to give clearance when drilling in a vise to stop the drill damaging the vise. Parallels can also be used if the vise itself has a damaged face, which could cause the workpiece to be held insecurely.

  7. 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.

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    mail.aol.com

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  9. Kelly drive - Wikipedia

    en.wikipedia.org/wiki/Kelly_drive

    Simple diagram of a drilling rig and its basic operation. The kelly drive is #19. A kelly drive is a type of well drilling device on an oil or gas drilling rig that employs a section of pipe with a polygonal (three-, four-, six-, or eight-sided) or splined outer surface, which passes through the matching polygonal or splined kelly (mating) bushing and rotary table.