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[–] 16 points 2 months ago (9 children)

Why are they cutting external threads with a tap, I don't even think that's physically possible.

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  • [–] 7 points 2 months ago (6 children)

    It's a thread mill, not a tap, the grooves are horizontal. It technically is possible to cut an external thread with a tap.

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  • [–] 3 points 2 months ago (3 children)

    Well TIL, not a machinist so I've only ever really used taps and dies.

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