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[Thread] Mental Math (mander.xyz)
submitted 6 days ago by fossilesque@mander.xyz to c/science_memes@mander.xyz
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[-] Geometrinen_Gepardi@sopuli.xyz 99 points 6 days 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 3 points 6 days 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

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this post was submitted on 15 Nov 2024
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