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F E D 1 3

Software for Calculation of Wave Spring Washers

(C) Copyright 2004-2019 by HEXAGON Software, Berlin

FED13 - Software for Wave Spring Washers

FED13 calculates characteristic line of spring and stresses of wave spring washers. Input data are external and internal ring diameter, flat thickness, number of waves, height of wave spring L0. The program calculates spring load and stress for assembly length L1 and L2. Material properties can be selected from the integrated material database.

Spring Drawing 2D and 3D

FED13 generates a true-scale drawing of the wave spring washer (2D dimensioned or not) that can be exported to your CAD system as DXF or IGES file.

Material Database

Material properties of the most important flat spring materials (tensile strength, permissible shear stress and bending stress as function of material thickness, modulus of elasticity, density) are stored at the integrated material database. The dbf file may be extended and modified by the user.


FED13 calculates characteristic line of spring (load-extension diagram) as function of spring travel and spring length.

Goodman Diagram

The operating zone of the selected material for the calculated wave spring is shown in the fatigue strength diagram. You can see whether or not the permissible variation of stress has been adhered to for dynamically stressed springs. The curves for fatigue strength (>10 million), as well as for 1 million and 100,000 load cycles are shown.

Quick View

Load-extension diagram together with tables of the essential spring data and results are printed on one page.


Input data and calculation results with spring travel, spring length, spring load and stresses for different spring positions may be printed, saved as text or HTML file, or exported to MS Excel via OLE interface.

Production Drawing

FED13 generates a production drawing of the wave spring washer with all dimensions.

HEXAGON-Help System

Auxiliary text and images are available for all dialogue windows. If error messages occur, you can get description and remedy suggestion.


All drawings and diagrams can be saved as DXF or IGES file to be loaded with CAD programs. The OLE interface lets you import/export data from/to Excel.

Export Formats


Import Formats

TXT, DBF, Excel, F13.

System Requirements

FED13 is available as 32-bit and 64-bit application for Windows 7, Windows 8, Windows 10.


HEXAGON gives a 24 month guarantee on full functionality of the software.

Download FED13 Demo for Windows (609 kB)

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