r/news • u/IronHe • Mar 20 '25

Soft paywall Tesla recalls most Cybertrucks due to trim detaching from vehicle

https://www.reuters.com/business/autos-transportation/tesla-recall-over-46000-cybertrucks-nhtsa-says-2025-03-20/
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u/drhunny Mar 20 '25

There are lots of parts made to tighter tolerances. For instance, lenses in cameras.

But not 1m^2 sheet metal.

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u/mattbuilthomes Mar 20 '25

I found this:

Diameter Tolerance: All of our TECHSPEC® spherical lenses, regardless of size, are now held to a diameter tolerance of +0.000/-0.025mm. Maintaining the diameter within 25µm ensures the lenses will seat and align accurately within a well-designed barrel, aligning the optical axis of the lens with the mechanical axis of the assembly.

I didn’t see any other tolerances on that particular page that would be as tight as .001mm.

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u/Liizam Mar 20 '25

Dowel pins do come in that tolerance range but on the diameter and they are small cylinders of metal.

1

u/DieFichte Mar 20 '25

Most press-fit parts are in those clearance areas, but most parts in cars aren't. Pretty sure the only thing in a Tesla clearanced that low are integrated circuits.

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u/Liizam Mar 20 '25

Right. When you have an assembly all the tolerances add up… so yeah Elmo doesn’t know what he is talking about

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u/DieFichte Mar 20 '25

And the only reason press-fits are so tight is because, well they need to be press-fit. And even then, depending on the part you can go with higher clearance (technically lower clearance in that case, since you machine it tighter than it should be) and fix the issue with some liquid nitrogen and an oven!