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 ...

The clock has three loops of roller link chain, each of which has a series of numbers welded to the links. The loops of chain are advanced around sprockets by a trio of geared-down motors ...

[davemoneysign] designed this fascinating roller chain kinetic sculpture ... design could be adapted into something like this chains-and-sprockets clock? You can see [Arthur Ganson]’s original ...