It's almost like he hears about how bad the build quality of Tesla cars have become, so he thinks the solution is more accurrate, more expensive parts. Kind of like he has absolutely no clue what he's doing, and doesn't want to listen to smarter people telling him what they need.

Tesla should mill the car from one solid block of steel.

10 microns is .4 thou, about the width of a cotton fiber. Its possible to machine those tolerances, but very time consuming as machine maintainance steps up. Its also small enough that the thermal expansion of the sheets will be larger than that

If LEGO and soda cans, which are very low cost, can do this, so can we.

This man is a certifiable idiot, and I feel bad for anyone working for him.

"All parts for this vehicle, whether internal or from suppliers, need to be designed and built to sub 10 micron accuracy.​"

LOL

Yeah ok.

Tell me you know nothing about manufacturing, without telling me you know nothing about manufacturing.

That one quote - assuming it is accurate - explains that Musk is even more of an idiot than everyone already knew he was. You don't make things at those tight tolerances. A couple of dimensions on a part might be (for instance the bore on a press fit sleeve), but you'd almost never, ever hold an entire part to that tight of a tolerance.

In imperial units, 10 microns is .00039". A human hair is roughly .001 to .005" thick. So he is asking for a tolerance that is 3 to 10x smaller than the thickness of a human hair. To put the absurdity of Musk's demand into perspective, most parts that go into a car are roughly an order of magnitude looser in tolerance with some dimensions being 2 orders of magnitude looser.

That difference might not sound like a lot, but holding something to +/-.0039 versus +/-.00039" could easily triple the price of an item or more. Easy. You use a tight tolerance only when you need to - that's engineering 101. Some parts could easily be +/- .039" and not affect their performance on bit. Close tolerance engine parts might be held at what Musk is demanding, but never "ALL PARTS" would be held to that.

Due to the nature of Cybertruck, which is made of bright metal with mostly straight edges, any dimensional variation shows up like a sore thumb.​

It sounds to me like the reasonable conclusion to draw from this would be to modify the design of the car. I'd also assume you don't need tolerances to be the same for literally all parts inside and out. I'd also think that, if the car looks that bad if things are 10 or more microns out of place, these cars are going to age terribly after regular use.

But what do I know? If I were smart, I'd be rich, right? And Elon is so rich, he must be a genius!

It's just marketing. Elon wants dumb tesla bros to think their truck is built to that accuracy. No need for it to be reality.

Cybertruck, Cybertruck,
Engineers say "what the fuck"
Micron fits for auto steel?
Those are not a thing that's real
So deal! Deal with it, Cybertruck.

In the full email he goes on to tell the engineer what a micron is.

I guess, he just read that word somewhere and now feels cool that he knows it.

It would be cute if he was a junior manager, but this way it's just sad.

Why does Space Karen still have all his fanbois? Do they really think he's some kind of software/technology/business genius, even after all that has come out about him?

If Elon would have looked back, he would have seen that Delorean has already tried bare metal, and it's nearly impossible to fix. Dent your truck? May as well paint it.

I mean, Elon obviously doesn't care about repairability, but the first few fender benders will result in a pile of articles about how unfixable the body panels actually are.

Elon gonna engineer the shit outta this thing. Nevermind coil steel itself varies by more than that before it goes into a die and stretches. It's almost like he doesn't have any background in automotive manufacturing. This statement makes me think Elon may not know what a micron even is. The fit and finish of Tesla's current offerings seems to evidence it anyway.

Hilarious considering the panel gaps in all his other cars, dude is fucking insane. Unattainable standards don't breed better work they breed exasperation and apathy.

Sounds like a pr campaign

Sure hun. Would you like that with a side of fries or mashed potatoes?

to build it to that accuracy the car would have to cost millions

Two things, not necessarily related.

1. The cybertronk looks highly regarded when put together correctly. Imagine if it has the panel gaps of other cars TSLA makes.

2. My tinfoil hat theory on why Elon is acting all right wing all of the sudden is to get those idiots to buy electric bare metal Pontiac Aztecs with "unbreakable" windows instead of F-150's

They've had five years to figure that stuff out. If they haven't done it by now, they never will.

Jesus that thing just remind me of Lara Croft's boobs in the first tombraider game.

While holding this tight of a tolerance is standard for small sinple injection molded plastic part like Lego blocks (0.01mm tol. usually need some really good tooling though), it's not really possible to hold this tight of a tolerance for large sheet metal construction such as the Cybertruck body (Standard tolerance should probably be in the milimeter range at most. )

So, guess the Cybertruck is never coming out.

"Bad news guys... We're gonna have to delay production for just TWO MORE YEARS because of these woke microns! The good news though, you can get re-premium upgraded waitlist VIP positioning with a renewal deposit of only $500"

Guarantee he has no understanding of metalwork. It's not tricky, it's an exact science.