I don’t recall seeing a fully exploded view of the Faber Castell mechanisms down to the chuck.
And I’ve not had the pleasure of doing a deep dive of chuck design. All I can say is, performance speaks for itself. I wish I’d captured the info in detail, so this is just hearsay anecdotal evidence. But I’d corresponded online with a collector once who was seriously into German writing instruments, particularly pencils by Faber Castell and rOtring. This was an older gentleman who’d been a draftsman and an engineer and used pencils a lot. He said he’d tried a number of automatic feed pencils and the TK-matic and alphamatic were the best in his opinion. Granted, he’d never used a PILOT Automac or Uni Ball Kuru Toga Dive… but I remember him saying how he used those FC pencils for over two decades without any problems whatsoever. I don’t know how gentle he was with them… but that kind of frequent use without problems over that period… well, speaks volumes.