SPR-020Engineering model
Mixed disc stack
Springs
Scope and limits
Mixed disc stack — geometry, declared design limits and explicit qualification gaps. Identical constant-thickness discs without contact flats, rim loading, ideal frictionless series/parallel arrangement. Calculation stops at flat; stresses, tolerances and fatigue need further evidence. Material/heat treatment, tolerances, surface condition, residual stress, relaxation, corrosion, operating temperature, fatigue life and production tests remain unverified.
Standards and references
Disc spring calculation
- Source scope
- Single discs and disc stacks. Replaces DIN 2092:2006-03 and earlier 2017 adoptions.
- Implementation in Prufi
- Independent ideal load/rate model for constant thickness without contact flats; full normative stresses, life and factors not implemented.
Disc spring quality requirements and dimensions
- Source scope
- Disc spring manufacture, dimensions, tolerances and quality. Replaces DIN 2093:2013-12.
- Implementation in Prufi
- Evidence requirements recorded; normative dimensional series and acceptance tolerances not implemented.
Disc spring calculation
- Source scope
- Calculation of disc springs.
- Implementation in Prufi
- Related context for ideal disc models; full standard implementation remains outstanding.
Disc spring technical specifications
- Source scope
- Technical requirements for disc springs.
- Implementation in Prufi
- Product tolerances/acceptance unassessed; see Amendment 1:2025.
Disc spring technical specifications: Amendment 1
- Source scope
- Amendment to the 2018 disc spring technical specification.
- Implementation in Prufi
- Inventory and revision reference only; amendment requirements are not implemented.