Micro-turning (Décolletage)

Micro-turning is a manufacturing process with stock removal for metals and synthetic materials starting from a bar (raw material). In contrast to milling, it's the workpiece or the semi-finished product which revolves; it performs the main cutting movement by its rotation... more


The gearing (serration) technology is one of the most efficient ways for positive transmission of forces and torques. Gearing (also called "taillage") makes possible slip-free, continuous, low-loss and low-noise power transmission. The product range of the FELLER SA mainly covers: Pignon d’échappement, Pignon de seconde, Pignon de minute... more


Roller Burnishing

Roller burnishing is main competency of FELLER SA. Roller burnishing is characterized by the following features: Roller burnishing is chipless smoothing and compression of metallic surfaces and iss micro finishing process that plastically shapes the boundary layers of the component. Roller burnishing is the only chipless micro finishing process... more


Assembling individual parts like pinions, pivots, wheels, springs etc. (pignons, axes, planches, ressorts etc.) in order to form complete assemblies (e.g. mobile de grande moyenne, mobile de seconde, mobile d’échappement, balancier réglé etc.) belongs to the core competencies of Feller SA... more


Through polishing, all defects are removed from turned parts. To accomplish this, they are mixed with ceramic media, abrasives and additives. This mixture is agitated in vibrating basins for several hours, or even several days... more


Lapping is as chip machining process using a grain distributed loosely in a paste or liquid (lapping mixture). This is apllied to a lapping tool – most often one that provides shaping – where the cutting tracks of the individual grains are largely non-directional... more

Heat treatment

Heat treatments allow the structure of the material to be changed to achieve the required hardness properties. FELLER SA carries these treatments to specialist partners.
In most cases, tempering is necessary for several reasons:

  • reducing mechanical wearing... more


Some parts need electrolytic treatments for plating metal surfaces, for example nickel-plating or gold plating.The purpose of these operations is to protect parts from oxidation, resistance and other reasons (i.e. electrical conductivity, etc.)... more