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  2. 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.

  3. Nozoki Ana - Wikipedia

    en.wikipedia.org/wiki/Nozoki_ana

    Nozoki Ana (Japanese: ノ・ゾ・キ・ア・ナ, lit: A Peep Hole) is a Japanese manga series written and illustrated by Honna Wakou about two college students, Tatsuhiko Kido and Emiru Ikuno, who are neighbors in the same apartment complex and are connected by a small "peephole" between their rooms.

  4. Drill bit - Wikipedia

    en.wikipedia.org/wiki/Drill_bit

    A trepan, sometimes called a BTA drill bit (after the Boring and Trepanning Association), is a drill bit that cuts an annulus and leaves a center core. Trepans usually have multiple carbide inserts and rely on water to cool the cutting tips and to flush chips out of the hole. Trepans are often used to cut large diameters and deep holes.

  5. Engineering drawing - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing

    The assembly drawing gives the drawing numbers of the subsequent detailed components, quantities required, construction materials and possibly 3D images that can be used to locate individual items. Although mostly consisting of pictographic representations, abbreviations and symbols are used for brevity and additional textual explanations may ...

  6. Engineering drawing abbreviations and symbols - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing...

    The issuance of a drawing from the engineering/design activity to the production activity. In other words, the event when a draft becomes a completed, official document. A stamp on the drawing saying "ISSUED" documents that RTP has occurred. RTV: room-temperature vulcanizing; return to vendor: 1. RTV sealants, a way to seal joints. 2.

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  8. Metal fabrication - Wikipedia

    en.wikipedia.org/wiki/Metal_fabrication

    The most common cutting method is shearing. Special band saws for cutting metal have hardened blades and feed mechanisms for even cutting. Abrasive cut-off saws, also known as chop saws, are similar to miter saws but have a steel-cutting abrasive disks. Cutting torches can cut large sections of steel with little effort.

  9. Hole saw - Wikipedia

    en.wikipedia.org/wiki/Hole_saw

    A hole saw (also styled holesaw), also known as a hole cutter, [1] is a saw blade of annular (ring) shape, whose annular kerf creates a hole in the workpiece without having to cut up the core material. It is used in a drill. Hole saws typically have a pilot drill bit (arbor) at their center to keep the saw teeth from walking. The fact that a ...