BS EN 13906-1:2013

Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, symbols, units and abbreviated
   terms
4 Theoretical compression spring diagram
5 Design principles
6 Types of Loading
7 Stress correction factor k
8 Material property values for the calculation of
   springs
9 Calculation formulae
10 Permissible torsional stresses
Annex A (informative) - Examples of relaxation for cold
        coiled springs
Bibliography

Defines the calculation and design of cold and hot coiled cylindrical helical compression springs with a linear characteristic, made from round wire and bar of constant diameter with values according to Table 1, and in respect of which the principal loading is applied in the direction of the spring axis.

This European Standard specifies the calculation and design of cold and hot coiled cylindrical helical compression springs with a linear characteristic, made from round wire and bar of constant diameter with values according to Table 1, and in respect of which the principal loading is applied in the direction of the spring axis. Table 1 Characteristic Cold coiled compression spring Hot coiled compression spring Wire or bar diameter d ≤ 20 mm 8 mm ≤ d ≤ 100 mm Number of active coils n ≥ 2 n ≥ 3 Spring index 4 ≤ w ≤ 20 3 ≤ w ≤ 12