Rolex’s patented shock absorber system for its movements is called Paraflex. It is designed to protect the delicate balance staff and other movement components from shocks that could affect accuracy or cause damage.
Mechanical watches rely on a balance wheel oscillating at a precise rate. The balance staff is particularly vulnerable because it is slender and supports the balance at its pivots. Paraflex improves the shock resistance of the balance assembly by allowing the relevant jewel setting and spring arrangement to absorb and manage sudden impacts more effectively.
Rolex introduced Paraflex in the mid-2000s, initially applying it to selected calibres before expanding its use. It is often confused with Parachrom, which is Rolex’s specialized hairspring material, not a shock absorber. Incabloc and KIF are different shock-protection systems used by other watchmakers and movement manufacturers. “Spiral” is a generic term associated with a hairspring, not Rolex’s patented impact-protection system.