How Crane Sprocket Gears Are Made from Scrap Ship Steel See how strong steel from scrap ships is turned into crane sprockets with features like detachable hubs split designs and integrated shafts ...

MCN Gear Guide: How to choose the best motorcycle ... meaning you’ll be replacing it sooner. A stretched chain also wears out sprockets sooner. Long story short, an un-lubed chain costs you ...

Perhaps with the addition of a motor this design could be adapted into something like this chains-and-sprockets clock? You can see [Arthur Ganson]’s original in action in the video embedded below.