• Geometrinen_Gepardi@sopuli.xyz
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    20 hours ago

    When sharpening knives, with practice you can tell when you are done by sliding your fingertips along (not across) the sharpened bevel. It’s possible to feel imperfections measured in micrometers this way.

    • DudeDudenson@lemmings.world
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      2 hours ago

      Worked at a machine shop for a while, it’s funny how the easiest way to gauge surface finish is to run your nail trough it

      At one of the places we worked at we would know when the rough cut was deep enough just by feel

    • danekrae@lemmy.world
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      19 hours ago

      We have equipment to measure down to microns, and my students often test how fine details they can feel.