ISO 19690-2:2018
Disc springs — Part 2: Technical specifications
This document specifies two different grades of disc springs.
Grade A defines basic requirements of disc springs for static applications with low and moderate performance. Springs manufactured according to Grade A are not used for dynamic applications.
Grade B defines requirements on disc springs especially used for dynamic applications and high performance static applications. Disc springs according to Grade B ensure a better quality by higher demands on manufacturing processes and tolerance requirements. Grade B includes graphs showing the guaranteed fatigue life such as a function of stress.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and units
5 Dimensions and designation
5.1 General
5.2 Disc spring groups
5.3 Dimensional series
6 Grade A — Basic performance requirements for static applications
6.1 Material
6.2 Manufacturing process
6.3 Permissible stresses
6.4 Presetting
6.5 Surface condition and corrosion protection
6.6 Tolerances
6.6.1 Thickness
6.6.2 External- internal diameter and coaxiality
6.6.3 Free height
6.6.4 Spring load
6.7 Clearance between disc spring and guiding element
6.8 Hardness
6.9 Appearance
7 Grade B — Requirements on disc springs for dynamic applications and high-performance static applications
7.1 Material
7.2 Manufacturing process
7.3 Permissible stresses
7.3.1 Static load
7.3.2 Dynamic loading
7.4 Shot peening
7.5 Presetting
7.6 Creep and relaxation
7.7 Surface condition and corrosion protection
7.8 Tolerances
7.8.1 Thickness
7.8.2 External-internal diameter and coaxiality
7.8.3 Free height
7.8.4 Spring load
7.9 Clearance between disc spring and guiding element
7.10 Hardness
7.11 Appearance
Annex A (informative) Spring dimensions
Annex B (informative) Testing
Annex C (normative) Representative material grades
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and units
5 Dimensions and designation
5.1 General
5.2 Disc spring groups
5.3 Dimensional series
6 Grade A — Basic performance requirements for static applications
6.1 Material
6.2 Manufacturing process
6.3 Permissible stresses
6.4 Presetting
6.5 Surface condition and corrosion protection
6.6 Tolerances
6.6.1 Thickness
6.6.2 External- internal diameter and coaxiality
6.6.3 Free height
6.6.4 Spring load
6.7 Clearance between disc spring and guiding element
6.8 Hardness
6.9 Appearance
7 Grade B — Requirements on disc springs for dynamic applications and high-performance static applications
7.1 Material
7.2 Manufacturing process
7.3 Permissible stresses
7.3.1 Static load
7.3.2 Dynamic loading
7.4 Shot peening
7.5 Presetting
7.6 Creep and relaxation
7.7 Surface condition and corrosion protection
7.8 Tolerances
7.8.1 Thickness
7.8.2 External-internal diameter and coaxiality
7.8.3 Free height
7.8.4 Spring load
7.9 Clearance between disc spring and guiding element
7.10 Hardness
7.11 Appearance
Annex A (informative) Spring dimensions
Annex B (informative) Testing
Annex C (normative) Representative material grades
Bibliography