It’s always good to see how something works by viewing it in slow motion. You get an understanding of the physics involved in the manufacturing process. This video shows just how an Ingersoll Cutting Tool machines away material on a CNC mill. You can see the chip formation in great detail as the material is removed from the stock.
Glacern Machine Tools has put together a fantastic nine part video series as a crash course in milling. Check out the video series below: Part 1 – Basic Milling Machine Anatomy