Extension springs according to DIN EN 13906-2, edition 2002


  • Spring forces or deflections or a combination of both can be given for the calculation
  • Geometry values like lengths, diameters and coils can be entered manually
  • Different kinds of supports and types of ends are available
  • Calculation of dynamic or static/quasi static load
  • Materials of springs are selectable from a database or can be defined individually
  • Tolerances according to DIN 2076 B/C, DIN 2077, DIN 2096, DIN 2097 will be taken into consideration
  • Calculation of spring eigenfrequency
  • Operation temperature will be taken into consideration
  • Goodman and Load-deflection diagram
  • Detailed calculation report in HTML and PDF format


The calculation takes place according to DIN 13906-2. The input of spring forces or deflections or a combination of both is possible. The other values for the extension spring geometry (e.g., lengths, diameters and coils) can be entered manually. During the input of the manual definition of the spring geometry, the values, depending on the entered value, are calculated automatically.

The following types of spring ends are available:

  • half german loop
  • full german loop
  • double german loop
  • full german loop sidewise
  • double german loop sidewise
  • raised hook
  • raised hook sidewise
  • english loop
  • coned end with swivel hook
  • threaded bolt rolled up
  • threaded bolt screwed in
  • screw ear screwed in
  • full german loop angular

The calculation is possible for dynamic or static/quasi static loads. The spring materials can be comfortably selected from the database. The own input of a material is also possible. So, the calculation with special material is supported. For hot-formed spring materials, a coil distance is definable. Additionally, the tolerances for the wire diameter can be defined according to DIN 2076 B and C, DIN 2077 or individually. Depending on the manufacturing process (hot-rolled or cold-formed), the tolerances will be calculated according to DIN 2095 or DIN 2096. Furthermore, the eigenfrequency will be calculated. The operation temperature also will be taken into consideration.

The important results, the static and dynamic utilisation of the permissible stress, the spring deviation and the utilisation of permissible spring deflection are displayed during the input. In addition, the Goodman and Load-deflection diagrams are available. A simple mouse-click allows to enlarge the diagrams.

When the calculation is finished, a report can be generated. This report includes the input values, the calculation method and the detailed comprehensible results.

The calculation report is available in HTML and PDF format.

Calculation of extension spring
Selection of material
Load-deflection diagram
Goodman diagram
Calculation report