this post was submitted on 26 Aug 2023
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Tesla is facing issues with the bare metal construction of the Cybertruck, which Elon Musk warned was as tricky to do as making Lego bricks

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[–] Ryumast3r@lemmy.world 13 points 1 year ago* (last edited 1 year ago) (2 children)

I've told many (usually new) design engineers that they're stupid for asking for 0.001" tolerance on parts when they only need 0.005 "or 0.010". The difference between 0.010" and sub-10 micron is easily a factor of 100 in most parts, ESPECIALLY when you're talking larger steel components like panels on a freaking car.

[–] eee@lemm.ee 10 points 1 year ago* (last edited 1 year ago)

ESPECIALLY when you’re talking larger steel components like panels on a freaking car.

not just that, he said "all parts". The stitching on the seats, the floor carpets, USB ports, cupholders and the A/C vents have to be more accurate than the width of a human hair too

[–] Hazdaz@lemmy.world 6 points 1 year ago (2 children)

Unless you are talking about a press fit location or some kind of high precision alignment issue, almost nothing needs anything tighter than .001" and .005 or .010" is perfectly fine for most things. I work with a lot of weldments so if we're within .030" we consider that good enough.

[–] PsychedSy@sh.itjust.works 5 points 1 year ago

+/- .030 good enough for most skin panels on airplanes.

[–] JohnDClay@sh.itjust.works 4 points 1 year ago

Gear teeth I believe need to be precision ground to less than a thou for best efficiency and life. But that's not for most things.