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10 microns = .01 mm = .0004 inch
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this post was submitted on 24 Aug 2023
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the_dunk_tank
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For Lego you can use injection moulding, which is pretty precise. I don't know how they build the chassis parts for Tesla but afaik deep drawing is used for car body sheets, and the tolerances there - depending on size and form of the part, material used, machine used to produce it... - I guess should be at least 10 times higher as what he expects it to be.
The major structure of most cars are made of stamped and spot-welded sheet metal, usually steel. IIRC Teslas are made mostly of aluminum, so some of the parts might be extruded, cast, and/or machined, and they might also be riveted and/or bonded (glued) together. The body shell shouldn't need to be very precise, maybe +/- .03" at most. On the other hand, the dies that make the body panels are under tremendous pressure and need to be more precise so that they can consistently turn out good parts without wearing down or breaking.