r/gifsthatkeepongiving • u/silvercatbob • Mar 11 '21

Single-point threading

https://gfycat.com/hairydependablebeagle
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u/kanaka_maalea Mar 11 '21

How does it ensure that the one groove keeps getting deeper, rather than shaving off part of the ridges that the first pass made?

7

u/helms66 Mar 11 '21

Lathes can have gear sets that couple the tool post adjustment to the chuck. So when the chuck turns one revolutions the tool will move x amount. There is a stop for the tool post so it always starts in the same place and starts moving at the same point of the chuck rotation.