C. Otto Gehrckens GmbH & Co. KG

Short description

As a well-known German manufacturer of precision O-rings and elastomer seals, COG combines high levels of materials expertise withe the very highest supply capability, all from the largest O-ring warehouse worldwide (45,000 items in stock).

Standards, Products, Services

  • S ISO 9001:2015
  • S ISO 14001:2015
  • S BS OHSAS 18001
  • P Sealing systems

About us

COG is an independent manufacturer situated in Pinneberg near Hamburg (Germany) and a leading supplier of precision O-rings and elastomer seals. COG stands for uncompromising premium-quality, experience and innovative strength for more than 150 years.

More than 250 employees at COG are committed to the success of our customers, ranging from engineers in the field of application technology to our fast colleagues from the world's largest O-ring warehouse (more than 45,000 positions available). High delivery capability, flexible production and customer-oriented practice on all levels characterize us.

  • Portfolio: O-rings, elastomer seals, mouldings and a variety of services
  • The world’s largest O-ring warehouse (over 45,000 items available in stock)
  • 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/FPM, FFKM/FFPM, FEPM, NBR, VMQ and any more…) plus lots of special materials (including PTFE, FEP- and PFA-coated)
  • Approvals/certifications in place for a wide variety of materials
  • Quality management to ISO 9001:2015
  • Environmental management to ISO 14001:2015