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  2. Sine bar - Wikipedia

    en.wikipedia.org/wiki/Sine_bar

    10-inch and 100-millimetre sine bars. In the U.S., 5-inch sine bars are the most common size. [1] Angles are measured using a sine bar with the help of gauge blocks and a dial gauge or a spirit level. The aim of a measurement is to measure the surface on which the dial gauge or spirit level is placed horizontally.

  3. Surface plate - Wikipedia

    en.wikipedia.org/wiki/Surface_plate

    Surface plates are a common tool in the manufacturing industry and are often fitted with mounting points so that it can be an integrated structural element of a machine such as a coordinate-measuring machine, precision optical assembly, or other high precision scientific & industrial machine. Plates are typically square or rectangular, although ...

  4. Ex-Cell-O - Wikipedia

    en.wikipedia.org/wiki/Ex-Cell-O

    Nozzle plates for rockets; Aircraft engine parts; Boring machines; Thread grinding machines; Center lapping machines; By the mid-1960s, the company was based in Troy, Michigan. [6] In 1986, Ex-Cell-O was acquired by defense industry conglomerate Textron for $77.50 per share in cash, totaling about $1.1 billion (about $3.1 billion in 2023 dollars).

  5. Gauge block - Wikipedia

    en.wikipedia.org/wiki/Gauge_block

    Metric gauge block set, 112 pcs Another set with 8 pcs, 125 mm - 500 mm Trolley model. Gauge blocks (also known as gage blocks, Johansson gauges, slip gauges, or Jo blocks) are a system for producing precision lengths.

  6. Sandwich plate system - Wikipedia

    en.wikipedia.org/wiki/Sandwich_plate_system

    Sandwich Plate System (SPS) is the name of a patented structural composite material comprising two metal plates bonded with an elastomer core. SPS was created in partnership with chemical manufacturer BASF incorporating Elastocore ® [ 1 ] as the core material.

  7. Surface integrity - Wikipedia

    en.wikipedia.org/wiki/Surface_integrity

    Surface integrity can have a great impact on a parts function; for example, Inconel 718 can have a fatigue limit as high as 540 MPa (78,000 psi) after a gentle grinding or as low as 150 MPa (22,000 psi) after electrical discharge machining (EDM). [5]

  8. Engineering drawing abbreviations and symbols - Wikipedia

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

    Floor Level of an existing or proposed building or concrete pad FN or F/N: flag note, flagnote; find number: 1. Flagnote: A flagnote is a note that is called out in specific spots in the field of the drawing. It is numbered with a stylized flag symbol surrounding the number (or sometimes a delta symbol). A general note applies generally and is ...

  9. Flatness (manufacturing) - Wikipedia

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

    Sir Joseph Whitworth popularized the first practical method of making accurate flat surfaces during the 1830s, [2] using engineer's blue and scraping techniques on three trial surfaces, in what is known as Whitworth's three plates method. [3] By testing all three in pairs against each other, it is ensured that the surfaces become flat.

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