https://www.youtube.com/watch?v=yeIsuCpJNnU
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Stefan Gotteswinter shows us all how to easily DIY (external) thread milling in a manual lathe:
https://www.youtube.com/watch?v=6_1Nlf-X4bw
While extremely versatile and efficient milling internal threads will never replace taps. For one not everybody has a CNC mill, secondly you can't chuck a CNC mill in your pocket and climb a mast to effect a repair or make an addition, thirdly a tap can be used where a CNC mill just cannot access.
Wonderful in a manufacturing environment but no use when the power goes down and a hole needs to be tapped or a thread repaired in order to make the generator work.
Still a marvel to watch, almost as satisfying as as a shaper!
My first introduction to Stefan Gotteswinter. Thank you.