• linearchaos@lemmy.worldEnglish
      0·
      2 months 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
        0·
        2 months 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.

    • LifeOfChance@lemmy.world
      0·
      2 months 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.

    • dunz@feddit.nu
      0·
      2 months 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.