JFK Rings
JFK Rings

JFK Rings GmbH

piston rings since 1927

JFK Rings GmbH – For more than 90 years we have continuously supplied piston rings to the whole world.

Many satisfied customers benefit from our experience in the development and manufacture of piston rings.

We have the right ring for each and every application. JFK Rings GmbH specializes in the production of metallic seals for all industrial applications. The combination of years of experience and high quality work with modern manufacturing techniques enables us to produce rings for all applications in the OEM and replacement business.

Products

We supply metallic piston rings:

 

  • In the diameter range of 8 to 1000 mm
  • With internal and external tension
  • In all joint types and ring styles
  • Based on national and international standards
  • Manufactured according to customer drawings or samples

 

For new products we offer consultation and development services.

Service & Advice

A service package according to your needs

more info

Material

We manufacture piston rings in the following materials

more info

Geometry

We supply metallic piston rings

more info

Surface coatings

We can realize the following coatings

more info

Quality

We are certified according to DIN EN ISO 9001 and 14001.

more info

Application

Applications of our piston rings

more info

Service & Advice

A service package according to your needs

  • Design and consultation
  • Wide diameter range
  • Variety of materials
  • Quality
  • Service


Quality and reliable service are the principles of our company policy.

Special Rings - Special Service

JFK Rings GmbH is specialist in the production of small and medium batches – starting from a single piece. We realise orders in 3 to 8 weeks and short term needs in a matter of days or hours. For serial or blanket orders, we offer warehousing and delivery according to customer requirements.

Material

We manufacture piston rings in the following materials:

  • Cast iron and alloyed cast iron
  • Bronze and bronze alloys, brass
  • Steel
  • High temperature, corrosion and wear resistant alloys

Geometry

We supply metallic piston rings:

  • In the diameter range of 8 to 1000 mm
  • With internal and external tension
  • In all joint types and ring styles
  • Based on national and international standards
  • Manufactured according to customer drawings or samples

For new products we offer consultation and development services.

Surface coating

  • Zinc and manganese phosphate
  • Tin, copper
  • Hard silver
  • Teflon


Additionally, we offer:

  • Advice on the selection of materials for specific applications
  • Novel and innovative coatings for special applications

Quality

JFK Rings GmbH is certified according to DIN EN ISO 9001 and 14001.

Our qualified staff and a comprehensive quality control – from incoming materials to finished products - guarantee a consistently high quality of the products.

In addition to the ISO certification JFK Rings GmbH is audited by many customers according to corporate standards and is approved as a supplier of highly stressed and safety relevant components.

We supply piston rings according to customer’s specific quality requests and utilise statistical process controls if required.

Application

Piston Ring Applications:

  • Engineering (OEM)
  • Hydraulics and pneumatics
  • Pumps and compressors
  • Power station equipment
  • Automotive / aviation
  • Defence / marine / offshore
  • Chemical Engineering

 

  • Gas, steam and water turbines
  • Hydraulic pumps and motors
  • Vacuum pumps
  • Compressors
  • Hydraulic cylinders
  • Drives and gear boxes
  • Shock absorber
  • Turbo charger
  • Control valves for high pressure and temperatures
  • Break systems and couplings

Close

Special Rings - Special Service:

JFK Rings GmbH is specialist in the production of small and medium batches – starting from a single piece.

We realise orders in 3 to 8 weeks and short term needs in a matter of days or hours. For serial or blanket orders, we offer warehousing and delivery according to customer requirements.

About us

JFK Rings GmbH is a manufacturer of piston rings and gaskets for industrial applications.

  • Founded in 1927 as a private family business by the Knocke Brothers
  • After the end of World War II, the company became part of the IFA Kombinat Nutzfahrzeuge Ludwigsfelde
  • In December 1990, the company was sold by the Treuhand to the Swedish DAROS Group
  • In mid-2010 the total DAROS group and thus also our factory and offices in Gera were taken over by the U.S. company FEDERAL-MOGUL
  • In February 2013, an M.B.O. put back into private ownership,  the current JFK Rings GmbH

As an independent medium-sized company, we can respond more flexibly to customer’s needs and we focus on industrial applications for metal seal rings.

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