Cylindrical helical springs made from round wire and bar. Calculation and design - Compression springs

Cylindrical helical springs made from round wire and bar. Calculation and design - Compression springs

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1   Scope

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