3 ms·
Far less common now that CNC mills are the norm. Tom Lipton recently built a (modern) semi-manual helical milling system: https://www.youtube.com/watch?v=AVydTv
by SAI_Peregrinus 6y ago
Far less common now that CNC mills are the norm. Tom Lipton recently built a (modern) semi-manual helical milling system: https://www.youtube.com/watch?v=AVydTvwqmRs https://www.youtube.com/watch?v=AVydTvwqmRs
He also shows some old books describing the process, starting at 1:55.