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This Document Has Been Superseded
A newer publication replaces it: BSI BS 8726-2, BSI BS EN 13906-3
Cylindrical helical springs made from round wire and bar. Guide to methods of specifying, tolerances and testing -- Torsion springs
This Part of BS 1726 provides guidance on the specification, tolerancing and testing of parallel sided helical torsion springs manufactured from round wire and bar.
It applies to springs which may or may not be stress relieved after forming (hereinafter referred to as group A springs) and to springs the material of which has undergone a structural change by heat treatment after forming (hereinafter referred to as group B springs).
This standard gives two methods of specifying springs for general purposes and one method of testing springs.
NOTE: It is not recommended that torsion springs be loaded in the opposite direction to that of coiling. If this is necessary then discussions should take place between purchaser and supplier.
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