High Precision Machining

Finishing of ceramic components from Schunk Technical Ceramics

The large variety of industries that Schunk supports allows Schunk to offer capability to produce components of various sizes, shapes, precision, and surface morphology. Schunk Ceramics has a wide range of equipment and almost unlimited machining possibilities in terms of component size and shape, tightly defined position tolerances, and a high degree of flatness (<= 5μm) and accuracy in terms of parallelism and roundness.

DMU 160 5-axis milling machine for ceramic finishing by Schunk Technical Ceramics

Metal inserts for ceramic components

In order to connect complex ceramic components to each other, Schunk Technical Ceramics offers connection solutions based on metal inserts. Since it is not practical to attach threads to the ceramic components themselves, these must be made of a different material. These are adapted to the corresponding application conditions of the component, such as temperature or chemical environment. If the inserts or sleeves (e.g. metal sleeves V2A) are bonded in the component, holes of threads in various sizes (M3-M12) can be attached. In addition, Schunk Ceramics offers epoxy resin bonding of blind and through holes as well as epoxy seals.


Ceramic processing from Schunk includes:

  • Five-axis CNC grinding (RA<0.1 and flatness <5µm) for ceramic components of various sizes (from 30 x 30mm to 1m x 1.8m x 0.7m)
  • Surface grinding (RA<0,3) for ceramic components up to 3m x 1m
  • Cylindrical grinding - internal as well as external
  • Wire EDM & Die Sinking EDM (EDM "Electrical Discharge Machining"/ Micro EDM) components up to 2m length and 430mm diameter
  • Green milling
  • Cutting
  • Lapping and polishing (RA<0,1)
  • Laser machining & laser marking (RA<0.8) as the most precise, efficient and reliable way to machine ceramic (Tolerances better than 10µm depending on component dimensions)

Coating of ceramic components

In addition to machining ceramic components, it is also possible to coat them. The type of coating is selected according to the application or environmental conditions and can therefore have different objectives. For example, coatings with nickel or CVD-SiC can protect the machined component from contamination, produce better polishing properties (e.g. for ceramic mirrors) or offer better tribological properties. When used in highly sensitive equipment, the coatings can separate a mating component or the environment within the equipment from the underlying ceramic.  For example, to prevent Si contamination, we can CVD-SiC coat our RB-SiC containing the free-SiC.


Coating & Plating at Schunk Technical Ceramics:

  • Nickel plating / Nip plating (50μm)
  • CVD-SiC plating (high strength with up to 2mm thickness, layer thicknesses from 50μm to 2000 µm, crystal sizes from 1-20μm)
Any questions?

Do you have any questions about our finishing processes for technical ceramics?

Contact us