• LifeOfChance@lemmy.world
      22·
      17 days ago

      It’s works most of them time unless you’re in a specialty trade making spindle, gears, and such that must be threaded backwards to avoid the wheel undoing itself.

        • dfense@lemmy.world
          2·
          16 days ago

          I heard from a gas guy that this is to ensure that only connectors made for gas usage are used and people don’t build crazy contraptions with plumber gear for flammable gases… Kinda makes sense.

      • bluewing@lemm.ee
        1·
        16 days ago

        Yep, 80% of the time it works every time!

        The point is, if you fix things, you WILL run into left handed threads at some point. I’ve found them in washers, vacuums, blenders, bikes, and cars. Left handed threads aren’t the most common thing, but they are out there waiting to screw with your mind and ruin your day…

    • dunz@feddit.nu
      4·
      16 days ago

      Or when you’re screwing in a screw from behind/under something while lying upside down using a ratchet with an angled extender and you aren’t sure which way is actually left/right where the screw is.

    • linearchaos@lemmy.worldEnglish
      3·
      17 days ago

      And you feel so incredibly dense every time you run into it and you can’t figure out what’s going on. The crank on my kids bike was out of whack the other week and I kept tightening it down and it kept coming back loose. I was turning the crank one way to tighten it which was pushing it against the lock nut but it needed to turn the other way to be pushed against the bearing before I tighten the lock nut down. If it was all right-handed it would have been clear what I was doing.

      • bluewing@lemm.ee
        3·
        16 days ago

        Spindles and shafting are places you can find left handed threads. And it depends on the direction of rotation like that bike crank. Can’t have things coming lose due to the way bike cranks turn, so they a left handed thread to stay tight.

        It took me a long to time learn that when dealing with such things that I need to stop, look, and think about how things are assembled and why.