It actually seems to be the case that there is no known standard work on this topic, especially in camera construction.
I therefore resort to general titles on precision engineering...
Hi, I'm a bit late on this, but the standard reference on machining, etc., has long been "Machinery's Handbook." Very concise, covers about everything I can think of... gears, shafts, materials, bearings, lots of formulas and specs, thread forms, etc., etc. Over 2500 pages in small type on thin paper.
Unfortunately it takes some considerable background to follow things, so it's not for everybody. And I don't really see any direct application to camera repair unless perhaps you're gonna manufacture some of your own parts.
Since the first edition published more than 100 years ago, Machinery’s Handbook has been the most popular engineering resource of all time. Universally con...
books.industrialpress.com
FWIW I suspect that most of the info can be found online. A big benefit of the Handbook is to pull it together into one place, with no question that it is reputable.