Technological Expertise to Meet Your Requirements
Global Expertise in Gearing Technology
The Christ & Heiri Group continually optimises and develops its technical capabilities. We have a state-of-the-art machine park with 150 turning and gear cutting machines at our sites in Löffingen and Selzach, among others.
In collaboration with leading partners, we also offer all types of finishing and post-processing treatments. Our aim is to offer you the right technology and the best quality results for every requirement.
Gear Hobbing
Gear hobbing is a flexible and productive process for the production of gears and worms. By using standard hobs, many types of gears can be manufactured cost-effectively. The high number of cutting edges in the machining process also enables a long tool life.
Worm Milling
Unlike hobbing, in worm gear milling, each tooth gap is milled out individually using a form cutter. The Christ & Heiri Group also uses high-speed milling with tool speeds of up to 15,000 rpm. This process allows for a higher surface finish while maintaining consistent productivity.
Thread Chasing
Thread chasing is an economical and technically excellent technology for manufacturing worms in a single operation. These worms are characterised by a particularly smooth surface and are ideal for noise-sensitive applications. This manufacturing process has been refined and improved by us over the years and represents a speciality of the Christ & Heiri Group.
Turning
Flawless turned parts, manufactured with the highest precision at our German site in Löffingen, among others, are the prerequisite for high-quality geared parts. With our CNC machines and six-spindle turning machines, we cover the entire service spectrum – from large series production to initial sample production.
Assembly
We offer the assembly of sub-assemblies for mechanical watch movements (micro-gearing for watch movements, e.g., chaussée montée (cannon pinion assembly) with defined friction, mobile de seconde, mobile de minuterie. We can handle the entire process in-house at our Selzach site in Switzerland.
Rolling
Rolling is a manufacturing process for finishing bearing journals and their shoulders on watch and instrument components. The workpiece is positioned in profiled grooves of carbide support discs and set in rotation. Material removal (0.005 to 0.02 mm, surface finish N3 – N4) is achieved using sharpened carbide discs. The use of ceramic or Degussit discs enables a pure grinding process with correspondingly greater material removal.