I have watched several videos which recommend cutting male threads (external threads using a die) in in both directions. To clarify, the demonstrators recommend cutting the threads with the larger side of the die first, then rotating the die (flipping it over) and cutting the threads again to remove the "starter" threads. This is supposed to created more/deeper threads along the whole length of the tenon.
I can barely spell threads, but I always thought that threads were angled/slanted giving them a direction. If they are angled,aren't you ruining the first set of threads and changing the direction of the threads (aka cross-threading)?
I have tried this several times and it seems to work, but I can't help but think that something doesn't make sense.
See this around the 9 minute mark: https://www.youtube.com/watch?v=vMvVgGivocw&t=683s
I can barely spell threads, but I always thought that threads were angled/slanted giving them a direction. If they are angled,aren't you ruining the first set of threads and changing the direction of the threads (aka cross-threading)?
I have tried this several times and it seems to work, but I can't help but think that something doesn't make sense.
See this around the 9 minute mark: https://www.youtube.com/watch?v=vMvVgGivocw&t=683s