Principe ActiGir

Product catalog summary

Introduction
MPS Micro Precision Systems AG introduces the ActiGir principle, an innovative solution integrated into rotor bearings to enhance performance and discretion in mechanical watches.

Advantages of the ActiGir Principle

Allows free rotation in one direction.
Provides controlled deceleration in the opposite direction.
Reduces noise levels.

Technical Background
The oscillating mass bearing is crucial for the automatic winding system in mechanical watches, ensuring optimal loading of the barrel spring. High rotational speeds can lead to excessive noise, prompting MPS to innovate a solution.

Innovation Details
MPS focused on reducing rotational speed without compromising winding efficiency. The development centered on the cage's characteristics, which separates the balls and incorporates an active deceleration function. This was achieved through finite element analysis and extensive practical testing to determine the best materials and geometry.

ActiGir Principle
The ActiGir principle is based on a unique cage design that allows free rotation in one direction and controlled friction in the other, effectively reducing noise from the winding mass bearing.

Patent Information
The ActiGir principle is patent pending under EP 17155835.6.

Catalog excerpts

Let's innovate together rras® watch Let's innovate together rras® watch Principe ActiGir Performance et discretion Performance and discretion

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Une solution technique innovante pour diminuer le bruit du roulement de masse oscillante A technical innovation to reduce the noise of the winding mass bearing ! Fonctionnement en mode libre Free mode operation Fonctionnement en mode freiné Breaking mode operation Avantages du principe ActiGir* intégré à un roulement de rotor : • Giration libre dans un sens de rotation • Décélération contrôlée dans l’autre sens de rotation • Réduction du niveau de bruit Advantages of the ActiGir* principle built-in the in a rotor bearing : • Free rotation in one direction • Controlled deceleration in the other...

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Principe ActiGir

Principe ActiGir

Catalog excerpts

All MPS Precimed catalogs and technical brochures