A hairspring is a thin, spiral-shaped piece of metal found in a watch movement. It acts as the regulating organ, controlling the oscillation of the balance wheel and keeping time accurate. The hairspring is connected to the balance wheel, which swings back and forth at a regular rate. The hairspring absorbs any shocks from other components, such as the mainspring, and maintains the balance wheel’s regular rate. It is a precision component and must be made of an elastic material in order to ensure accuracy. Its thinness allows it to move freely and absorb shocks, while its spiral shape helps to protect the balance wheel from impacts.
