BS EN 13906-3:2014

This standard BS EN 13906-3:2014 Cylindrical helical springs made from round wire and bar. Calculation and design is classified in these ICS categories:

• 21.160 Springs

This European Standard specifies the calculation and design of cold and hot coiled cylindrical helical torsion springs with a linear characteristic, made from round wire and bar of constant diameter with values according to Table 1.

Table 1

Characteristic	Cold coiled torsion spring	Hot coiled torsion springa
Wire or bar diameter	d ≤ 20 mm	d ≥ 10 mm
Number of active coils	n ≥ 2	n ≥ 2
Spring index	4 ≤ w ≤ 20	4 ≤ w ≤ 12

^a The user of this European Standard shall pay attention to the design of hot coiled springs, because there can be differences between the design and a real test.