Techniques › Regulation / Adjustment

COMPONENTS INVOLVED IN REGULATION / ADJUSTMENT OPERATIONS

Regulation / Adjustment operations concern a limited number of components belonging to the regulating organ of the mechanical movement. These are the Balance, the oscillating organ whose inertia and poising determine the natural frequency and daily rate; the Balance staff, whose geometry, polish and pivot condition directly influence the rate variations observed between the different positions; the Hairspring (balance spring), whose active length, entry and shape of the terminal curve largely determine the isochronism of the oscillations; the Collet, a small collet that connects the inner end of the hairspring to the balance staff; and the stud, a part that fixes the outer end of the hairspring to the bridge or balance cock, most often via the regulator assembly. Together, these components form the regulating organ of the watch. The double roller, although inseparable from the balance since it is directly pressed onto the balance staff, is not part of it: it belongs to the distribution mechanism, as it ensures the mechanical connection between the oscillator and the escapement rather than a dedicated regulation function.