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  2. Surface finish - Wikipedia

    en.wikipedia.org/wiki/Surface_finish

    Surface finish. Surface finish, also known as surface texture or surface topography, is the nature of a surface as defined by the three characteristics of lay, surface roughness, and waviness. [1] It comprises the small, local deviations of a surface from the perfectly flat ideal (a true plane). Surface texture is one of the important factors ...

  3. Surface roughness - Wikipedia

    en.wikipedia.org/wiki/Surface_roughness

    Surface roughness, often shortened to roughness, is a component of surface finish (surface texture). It is quantified by the deviations in the direction of the normal vector of a real surface from its ideal form. If these deviations are large, the surface is rough; if they are small, the surface is smooth. In surface metrology, roughness is ...

  4. Surface metrology - Wikipedia

    en.wikipedia.org/wiki/Surface_metrology

    Surface metrology. Surface metrology is the measurement of small-scale features on surfaces, and is a branch of metrology. Surface primary form, surface fractality, and surface finish (including surface roughness) are the parameters most commonly associated with the field. It is important to many disciplines and is mostly known for the ...

  5. Profilometer - Wikipedia

    en.wikipedia.org/wiki/Profilometer

    A profilometer is a measuring instrument used to measure a surface's profile, in order to quantify its roughness. Critical dimensions as step, curvature, flatness are computed from the surface topography. While the historical notion of a profilometer was a device similar to a phonograph that measures a surface as the surface is moved relative ...

  6. Surface finishing - Wikipedia

    en.wikipedia.org/wiki/Surface_finishing

    Surface finishing. A drill bit with surface finishing to make the cutting edges harder. Surface finishing is a broad range of industrial processes that alter the surface of a manufactured item to achieve a certain property. [1] Finishing processes may be employed to: improve appearance, adhesion or wettability, solderability, corrosion ...

  7. Moody chart - Wikipedia

    en.wikipedia.org/wiki/Moody_chart

    Moody chart. In engineering, the Moody chart or Moody diagram (also Stanton diagram) is a graph in non-dimensional form that relates the Darcy–Weisbach friction factor fD, Reynolds number Re, and surface roughness for fully developed flow in a circular pipe. It can be used to predict pressure drop or flow rate down such a pipe.

  8. Gauge block - Wikipedia

    en.wikipedia.org/wiki/Gauge_block

    Gauge block. Gauge blocks (also known as gage blocks, Johansson gauges, slip gauges, or Jo blocks) are a system for producing precision lengths. The individual gauge block is a metal or ceramic block that has been precision ground and lapped to a specific thickness. Gauge blocks come in sets of blocks with a range of standard lengths.

  9. International roughness index - Wikipedia

    en.wikipedia.org/wiki/International_roughness_index

    The international roughness index (IRI) is the roughness index most commonly obtained from measured longitudinal road profiles. It is calculated using a quarter-car vehicle math model, whose response is accumulated to yield a roughness index with units of slope (in/mi, m/km, etc.). [1][2] Although a universal term, IRI is calculated per ...