The going trainGoing Train The going train is a series of gears that transfer power from the mainspring to the escapement. It typically includes the third wheel, the center wheel and the escape wheel. [Learn More] is a series of gears that transfer power from the mainspringMainspring The mainspring is a spiral-shaped metal spring that stores energy in a mechanical watch movement. It is located inside the barrel, a cylindrical container. The mainspring is wound by the wearer, either manually or automatically, through the movement of the wearer's wrist. The mainspring is the source of energy for the watch, and the tension in the mainspring determines the power reserve. The mainspring unwinds over time, and the watch will stop running when the mainspring is fully unwound. [Learn More] to the escapementEscapement The escapement is a mechanism in a mechanical watch movement that regulates the release of energy from the mainspring and keeps the watch ticking at a steady rate. The escapement is made up of two main components: the escape wheel, which is a gear with peculiar teeth, and the pallet, which is a lever that works in conjunction with the escape wheel. The escapement is responsible for the ticking sound of the watch, and more importantly it ensures that the watch runs at a consistent rate. Every time the escape wheel rotates forward, it locks and unlocks with the pallet, allowing a small amount of energy from the mainspring to be released. This causes the balance wheel to oscillate and the watch to tick. [Learn More]. It typically includes the third wheelThird Wheel The third wheel is typically the first gear in the going train, and is connected to the mainspring barrel, which holds the mainspring. The third wheel receives power from the mainspring and transmits it to the center wheel. [Learn More], the center wheel and the escape wheelEscape wheel The escape wheel is part of the escapement mechanism. As the mainspring unwinds, it turns the going train gears and rotates the escape wheel. As the escape wheel rotates, it pushes the pallet, which releases a small amount of energy to the balance wheel at regular intervals. This causes the balance wheel to oscillate back and forth, which in turn drives the timekeeping functions of the watch. [More Info].