Hobbing spur gears with an universal milling machine: [36 min]
https://www.youtube.com/watch?v=3gJGD9lWlVA
Hobbing attachment for universal milling machines. Part 1: The Basics. [14 min]
https://www.youtube.com/watch?v=9hh0H74dLxM
Hobbing attachment for helical gears. Part 2: A better approach. [35 min]
https://www.youtube.com/watch?v=c__V3pKEvRE
