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Metallic seals according to ISO 2768 – tolerance-based production guarantees interchangeability

Like all machine components, metallic seals also have to meet the criteria of “interchangeability”. In accordance with this concept of industrial production, any number of parts “X” produced in different locations and at different times must fit together with any number of parts “Y” produced in the same way without post-processing. The prerequisite for this is binding standards and standardised tolerances. We are honouring this by producing metallic seals according to ISO 2768.

What are general tolerances?

The general tolerances according to ISO 2768 apply to all dimensions for which tolerances are not indicated. Part 1 of this standard relates to symmetrical tolerances for linear and angular dimensions, whilst Part 2 deals with tolerances for the shape and the location.

Which tolerances are permissible is based on the nominal size and the nominal dimension range. The smaller (greater) the nominal size, the smaller (greater) the tolerance. The tolerance class (fine medium, coarse or very coarse) also plays a role.

The right sealing material for every area of application

Requirements for the material are not provided in ISO 2768. You have a free choice between copper, vulcanised fibre, aluminium, nickel or stainless steel. However, not every material is suitable for every field of application. We will be happy to advise you regarding all the options and will work with you to find the optimal metallic seal for your application.

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  • Hugo Fassbender Dichtungsgesellschaft mbH
    Linde 13
    51399 Burscheid

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