EN 15800:2008

Foreword
1 Scope
2 Normative references
3 Representation
4 Definitions, symbols, units and terms
5 Requirements
  5.1 Coiling direction
  5.2 Spring ends
  5.3 Solid length L[c]
  5.4 Material
  5.5 Surface Treatment
6 Quality grades
  6.1 Permissible variations of Quality Grades
  6.2 Permissible variations of wire diameters d
  6.3 Permissible variations A[D] for coil
      diameter D of unloaded spring
  6.4 Permissible variations A[F] for spring
      force F at given spring length L
  6.5 Permissible variations A[L0] for
      length L[0] of unloaded spring
  6.6 Permissible variations e[1] and e[2] of
      unloaded springs with ends closed and ground
  6.7 Production margin
7 Testing
  7.1 Static load testing
  7.2 Characteristic
  7.3 Test load for pressing to solid length
      (settling testing)
Annex A (informative) - Declaration and formulas
Annex B (informative) - Example - Specification
        for a Cylindrical Helical Compression Spring
Bibliography

This European Standard applies to cylindrical helical compression springs made of round spring wire. Cold coiled compression springs can be made with wire up to about 16 mm diameter. (See also EN 13906-1).NOTEFor springs with wire diameter upper 16 mm up to 20 mm see Annex ACylindrical helical springs made of round wire from European Standard materials are subject to the limiting values in Table 1 (see also Annex A):Table 1 Characteristic Cold coiled compression springsWire diameter0,07 mm ≤ d ≤ 16 mmMean coil diameter0,63 mm ≤ D ≤ 200 mmLength of unloaded spring Lo ≤ 630 mm Number of active coilsn  2 Spring index4 ≤w ≤ 20 A specification for the parameters of cold formed helical compression springs is given in Annex B.