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  2. Deep hole drilling - Wikipedia

    en.wikipedia.org/wiki/Deep_hole_drilling

    The ejector drilling process was developed as deep hole drilling technology which can be used on conventional machine tools. The use of single-lip deep hole drilling is particularly common on machining centres in series production. On the right you can see schematic drawings of conventional deep hole drilling machines. [1]

  3. Boring (manufacturing) - Wikipedia

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

    The boring bar is the protruding arm of the machine that holds the cutting tool(s), and must be very rigid. [2] Because of the factors just mentioned, deep-hole drilling and deep-hole boring are inherently challenging areas of practice that demand special tooling and techniques. Nevertheless, technologies have been developed that produce deep ...

  4. Gun drill - Wikipedia

    en.wikipedia.org/wiki/Gun_drill

    A gun drilling machine drilling holes in steel. There are three basic types of deep hole drilling. [2] Processes are categorized by how the cutting coolant flushes heat and chips from the cutting face. The three types of deep drilling are: Gun drilling - The cutting tool is a fluted solid rod that has a hole bored down the center.

  5. Bertha (tunnel boring machine) - Wikipedia

    en.wikipedia.org/wiki/Bertha_(tunnel_boring_machine)

    Freighter Fairpartner carrying the disassembled tunnel boring machine into the Port of Seattle in April 2013. Bertha was designed and manufactured by Hitachi Zosen Sakai Works of Osaka, Japan, and was the world's largest earth pressure balance tunnel boring machine, [14] at a cutterhead diameter of 57.5 feet (17.5 m) across.

  6. Boring (earth) - Wikipedia

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

    Boring is drilling a hole, tunnel, or well in the Earth. It is used for various applications in geology , agriculture , hydrology , civil engineering , and mineral exploration . Today, most Earth drilling serves one of the following purposes:

  7. Drilling - Wikipedia

    en.wikipedia.org/wiki/Drilling

    Blast hole several meters long, drilled in granite. Deep hole drilling is defined as drilling a hole of depth greater than ten times the diameter of the hole. [3] These types of holes require special equipment to maintain the straightness and tolerances. Other considerations are roundness and surface finish.

  8. Jig borer - Wikipedia

    en.wikipedia.org/wiki/Jig_borer

    Franklin D. Jones, in his textbook Machine Shop Training Course (5th ed), [4] noted: "In many cases, a jig borer is a 'jig eliminator.' In other words, such a machine may be used instead of a jig either when the quantity of work is not large enough to warrant making a jig or when there is insufficient time for jig making."

  9. Raise borer - Wikipedia

    en.wikipedia.org/wiki/Raise_borer

    A schematic overview of the machinery used irony a raised boring. A raise borer is a machine used in underground mining, to excavate a circular hole between two levels of a mine without the use of explosives. The raise borer is set up on the upper level of the two levels to be connected, on an evenly laid platform (typically a concrete pad).

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