Screw compressor screws
Source: https://imgur.com/ZA84vut
Torino 380
Mechanical Principles by Ralph Steiner (1930)
INGOT STRIPPER CRANE, WITH STEELWORKER FOR SCALE. - U.S. Steel Homestead Works, 45" Plate Mill, Along Monongahela River, Homestead, Allegheny County, PA
Source: https://imgur.com/4C4qMUB
Inside the gearbox of a gearhead lathe
Source: https://imgur.com/IaiLJSp
BMW F30 M3 + F32 M4 Engine Components (S55B30)
15.06.30
Quick video of the camelback press in action.