Glossary

O-ring coating

An O-ring coating is used to facilitate the assembly process and to reduce friction (coefficient of friction) during dynamic processes. In the past, this coating was taken over by classic lubricants such as oils and greases. In recent years, the O-ring coating or dry lubrication with anti-friction coatings has become increasingly important in this area. Compared to normal lubrication, the application of an anti-friction coating offers the advantage that automated mass part coating can take place. Furthermore, an O-ring coating leaves a clean, dry component surface. Other possible uses range from shaft sealing rings to use in sealing elements in fittings to facilitating assembly. Almost all elastomers (e.g. NBR, EPDM, ACM, VMQ) can be coated. The solid lubricants are bound in an O-ring coating, which reduces the friction values ​​of the sealing material and achieves a significant reduction in the effort required during assembly processes. With dynamically moving components, the coating prevents the occurrence of stick-slip effects and thus the avoidance of squeaking noises. An O-ring coating is usually carried out as a mass part coating (dipping, drumming or similar). A firmly adhering, dry bonded coating film (dry lubrication) with a layer thickness of a few µm remains on the surface of the coated components.

The advantages of an O-ring coating are: 

  • permanently low coefficient of friction
  • lasting good dry-running properties
  • no stick-slip effect
  • improved aging resistance
  • can be used in dynamic applications
  • can be applied to sections of the rubber seal
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