Premium quality since 1867


COG represents uncompromising quality. Because our customers are among the best in their sectors. And they also expect the best from us. We have been committed to our customers for over 150 years. The company is currently managed by the fifth generation of the owner family.  

As an independent manufacturer based in Pinneberg, near Hamburg, we are one of the leading suppliers of precision O-rings. We are distinguished by high delivery capability, flexible production and a deeply embedded orientation to the customer at all levels.

Facts, figures, benefits: COG at a glance

  • The world’s largest O-ring stockist (over 45,000 items available in our warehouse)
  • Tools available for approx. 22,000 different O-ring dimensions
  • Our own mixing and compound development facilities
  • Our own toolshop
  • Close cooperation with leading suppliers of raw materials
  • All essential materials for elastomer seal technology are available (including FKM, FFKM, FEPM, NBR, VMQ and any more…) plus lots of special materials (including PTFE, FEP, TPU and FEP coated)
  • Approvals/certifications in place for a wide variety of materials
  • Quality management to DIN EN ISO 9001:2008
  • Environmental management to DIN EN ISO 14001:2009