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2. List of gauge conversions - Wikipedia

   en.wikipedia.org/wiki/List_of_gauge_conversions

   This is a list of notable railway track gauge conversions, railway lines where the distance between the rails is broadened or narrowed.Conversions to broader gauge are generally to accommodate heavier loads or for wider cars, while conversions to narrower gauge tend to be for compatibility with other lines on a rail network.

3. Sheet metal - Wikipedia

   en.wikipedia.org/wiki/Sheet_metal

   The older United States Standard Gauge is based upon 40 lb per square foot per inch thick. Gauge is defined differently for ferrous (iron-based) and non-ferrous metals (e.g. aluminium and brass). The gauge thicknesses shown in column 2 (U.S. standard sheet and plate iron and steel decimal inch (mm)) seem somewhat arbitrary.

4. Hegman gauge - Wikipedia

   en.wikipedia.org/wiki/Hegman_gauge

   A Hegman gauge, sometimes referred to as a grind gauge, grind gage, or grindometer, is an instrument which indicates the fineness of grind or the presence of coarse particles and agglomeration in a dispersion. [1]

5. List of track gauges - Wikipedia

   en.wikipedia.org/wiki/List_of_track_gauges

   See 7 + 1 ⁄ 2 in (190.5 mm) gauge ridable miniature railways: 210 mm 8 + 1 ⁄ 4 in: See 8 + 1 ⁄ 4 in (210 mm) gauge ridable miniature railways: 229 mm 9 in: See 9 in (229 mm) gauge ridable miniature railways: England: Railway built by minimum gauge pioneer Sir Arthur Heywood, later abandoned in favor of 15 in (381 mm) gauge. 240 mm 9 + 7 ...

6. Engineering drawing abbreviations and symbols - Wikipedia

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

   socket head set screw: A set screw with a socket head (usually implying a hex socket, driven with a hex key. SI: Système international [d'unités] [International System of Units] The metric system in its current form (latest standards). SN or S/N: serial number: SOL ANN: solution anneal, solution annealed: SPEC or spec: specification: SPHER ...

7. 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. The individual gauge block is a metal or ceramic block that has been precision ground and lapped to a specific thickness. Gauge ...