Thanks for very interesting video. It shows how far fabrication has advanced. I can appreciate this much more than most as I had an experimental 5-year course called Engineering Physic at Cornell. Program was soon cancelled as more than half my class transferred out to easier 4-year programs like Electrical, Mechanical or Chemical engineering. It was very tough program with quite a few classes being taken by graduate students too. I don't think the US has ever since or before offered such a great undergraduate educational opportunity. I worked like "two dogs" to graduate as needed to hold a GPA = or > 80 to keep my full needs scholarship.
In one of my many labs I learned how to use all machine tools and even how to make the cutting tools the lathe uses. I made a 28 tooth gear with the indexing milling machine, and a "tighting bolt" (hexagonal mid section with one end a clockwise thread and other a counter clockwise threaded bolt about inch in diameter and several inches long on each end). Both were made from metal blanks I had made in another lab the year before with "green sand" casting techniques. ( I also cast a lead tip for my small sail boat's wooden center board, which always "floated up" as I came about or "jibed," using skill learned at Cornell, but that was several years later as Ph.D. student and sailing on the Chesapeake Bay.)
Point of all this is I know (or once did) my way around an analogue machine shop. So in a couple of years, working 8 hours a day,** I could do what was shown and done in your video in about an hour, I guess (not counting the time it took some human to change between the many cutting tools used.)
SUMMARY: Machining has come a long way baby!
* I worked in the research lab of a small oil company one summer between years at Cornell. People were often breaking Hg U-shaped manometers and I collected the mercury from the floor. By end of summer I had nearly a liter in small plastic flask. In Baltimore, (at JHU) years later, I traded it for some lead and the privilege of using their green sand casting facility, after making it clear I knew what I was doing. - a very good deal for them and me. At JHU, I also made the apparatus needed for my experimental Ph.D. as professor's shop time needs bumped those of a graduate down on the waiting list, by months sometimes.
** This with the highly unlikely assumption I made no mistakes and ruined the piece, like a class mate did with his 27 and a half tooth gear! I would guess that If I could live 1000 years, and worked 8 hours each day, I would have a 50/50 chance of completing one of the video job pieces with no error. - That is the fantastic advance CNC has made.
