CNC Swiss turning

Originally invented for the watchmaking industry, CNC Swiss turning is variety of machining. Unlike conventional turning, Swiss turning is used for long and slim turned parts, which are produced from bar material or wire.

Another difference in comparison to conventional CNC turning is the way how material is processed. At Swiss turning, the material is moved axial through a fixed but absolute precise guide bush. With an also fixed tooling, the main spindle and the material has to rotate and moved forward at cutting speed.

Advantages of Swiss turning

While machining relatively close to the guiding bush, the material won't be pushed away from the tooling which results in repeatable precision even with long parts. This way, Swiss turning is best used for very long and precise diameters, which are harder to achieve while turning conventionally.

Furthermore, very hard materials can be processed, since the distance between the tools and the guiding is very low, allowing long feeding with deep chipping at close tolerances.

Additional advantages of Swiss turning are:

  • less vibrations
  • high precision
  • less wear

Limitations of Swiss turning

Technologically, Swiss turning is restricted to a maximum diameter depending on the type of machinery. Also, the later contour needs to be machined in a single move, since a second turn would require a drive back of the bar material. This is technological impossible.

Precise turned parts for the automotive industry

As a certified 16949:2009 automotive supplier, we are machining components with complex surface designs for power trains on Swiss automatic lathes. In cooperation with other system suppliers, PENTACON developed a new method to connect Swiss turning with profile-rolling. The result is an optimized new product for the automobile industry which brings drive system to new heights.