Conversation
MISSIFLIPPI TRUTHER 
coolbean@brain.worm.pink
its kinda terrifying how the micrometer isnt an unheard of unit in machining
like thats so small what do you mean ppl work with tolerances the size of red blood cells and literal bacteria
like thats so small what do you mean ppl work with tolerances the size of red blood cells and literal bacteria
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@coolbean this is why if you’re paying for something to get machined anything with a tolerance below 0.1mm is astronomically expensive
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MISSIFLIPPI TRUTHER
coolbean@brain.worm.pink
@Clover lazy bastards cant even make it finer than a hair's width. pathetic
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@coolbean I say astronomically but looking it up actually for flat surfaces ±0.125mm seems to be standard for flat surfaces, though going tighter than that by half makes things go up 30-50% and more than that costs double or triple
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@coolbean so like ±0.05mm to ±0.025mm is considered precision and is 1.5-2.5x cost
±0.0125mm is considered ultra precision and is 3-10x cost
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@coolbean you can do micrometer size stuff with hand tools, esp if you're just talking about flatness
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@coolbean if you want to be absolutely flabbergasted by how precise hand manufactured stuff can be you should look into optics. Fucking nanometer scale in both surface roughness and shape with a turntable
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@coolbean heugen optics has a bunch of vids on how to do that kinda stuff. You need pretty elaborate measurement tools as you can basically only figure out how close oyu aee to the desired shape with interferometry but the shaping itself just happens with pitch and polish
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