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DIN 3760 is a German standard that defines the requirements for radial lip seals, also known as radial shaft seals. The standard, titled "Radial shaft seals - Design, dimensions, testing" (in German: "Radial-Wellendichtringe - Konstruktion, Maße, Prüfung"), provides detailed specifications for the design, dimensions, materials, and testing of radial lip seals.
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⚠️ : If you search “din 3760 pdf free download,” you will find some websites offering the document for free. However, these are almost always unauthorized copies. Using outdated or corrupted scans from third-party sites poses risks for professional engineering applications where compliance is critical.
DIN 3760 is a German industrial standard published by the that specifies the dimensions, materials, marking, and installation requirements for rotary shaft lip type seals —commonly known as radial shaft seals, oil seals, or Simmerringe . The standard is officially titled “Rotary shaft lip type seals” (in German: Radial-Wellendichtringe ).
The current active version of the standard is , which was published in September 1996 and replaces earlier editions from 1972 and 1993. A corrigendum (Berichtigung 1) was issued in April 2019 to correct minor errors and clarify certain points; this document is available free of charge. The standard has not been withdrawn or superseded, and it remains in force as the primary reference for radial shaft seals in general machinery. din 3760 pdf
Using parts that adhere to DIN 3760 ensures interchangeability across different manufacturers worldwide. Where to Find the PDF
This standard applies to seals used in dynamic rotary applications, such as gearboxes, electric motors, pumps, and automotive drive axles. It ensures interchangeability between manufacturers and establishes a baseline for reliable performance. Core Seal Designs Defined by DIN 3760
High safety for static sealing; housings with high thermal expansion. Rubber-covered outer diameter with an additional
The standard classifies rotary shaft seals into several primary types based on their construction and the presence of a dust lip. The most common types utilize a rubber-covered metal outer sleeve to ensure optimal sealing inside the housing bore. DIN 3760 is a German standard that defines
If you work internationally, you might need to convert standards. DIN 3760 is not isolated; it aligns with global norms.
(higher hardness recommended for higher peripheral speeds, up to 60 HRC at 10 m/s). Installation
The housing bore should be machined to an H8 tolerance.
The standard covers two primary types of seals: ⚠️ : If you search “din 3760 pdf
An added to any variant (such as Form AS) indicates the inclusion of an auxiliary dust lip . This secondary lip functions without a garter spring and acts as a mechanical barrier against external dirt, dust, and moisture splash. When using dust lips, filling the internal cavity between the primary and secondary lips with grease minimizes friction during operation. Core Technical Specifications & Operating Limits
The standard is primarily designed for low-pressure environments. If your application involves high pressure, high rotational speeds, or severe chemical exposure, the seal manufacturer should be consulted for specialized solutions, rather than adhering strictly to the base DIN 3760 specs. If you'd like, I can: Provide a table of typical DIN 3760 dimensions . Compare NBR vs. FKM materials for specific applications.
The DIN 3760 PDF contains the following essential technical information:
is a German Institute for Standardization (Deutsches Institut für Normung) norm that specifies the requirements for radial shaft seals in mechanical engineering applications, specifically for retaining grease or oil in rotating shaft systems. These seals are designed for unpressurized systems or systems with low differential pressure. The standard primarily covers: Dimensions: Standard diameters for shafts ( ) and housing bores ( ), along with standard widths (
