Machining a space shuttle main injector in 1977 - photo

[12L14]

Do I see broken tool there?

[Ralphxyz]

The tool looks like a boring bar not a drill.

Ralph

[12L14]

I mean the one seven or eight holes CCW in same row, or did he just marked first one?

[jdurand]

It looks like he's currently reaming the holes, they were drilled in a previous step. So mark where you start so you don't redo the same holes all day.

[Toolmaker51]

I'd love to see a video/movie of it in action!

Ralph

Well,I looked but didn't turn up one I expected to head the list. It's about 1955 from K&T itself, about 20 minutes. It's the only one that puts it through its paces, albeit a demo.
The regular you-tubers playing with them pretty clueless what they are messing with. EVERY-body's a producer or net-star these days, credentials or where-with-all be damned.