December 2013
Translation by DIN-Sprachendienst.
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ICS 21.160
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www.din.de D
DIN 2093
Disc springs –
editorially
Quality specifications –Dimensions,
English translation of DIN 2093:2013-12
Tellerfedern –
Qualitätsanforderungen –Maße,
Englische Übersetzung von DIN 2093:2013-12Rondelles ressorts –Exigences de qualité –Dimensions,
Traduction anglaise de DIN 2093:2013-12
©
Supersedes
DIN 2093:2013-02
www.beuth.de
In case of doubt, the German-language original shall be considered authoritative.
Document comprises 18 pages
04.14
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A comma is used as the decimal marker.
Foreword
This document has been prepared by Working Committee NA 026-00-02 AA Tellerfedern  of the Normen -ausschuss Federn, Stanzteile und Blechformteile  (NAFS) (Springs, Stamped Parts and Moulded Parts Standards Committee) in DIN.
Since this edition is a corrected edition of DIN 2093:2006-03, the Amendments clause from the 2006 e
dition is reproduced here. In the meantime, the ISO 31 series of standards has been replaced by the ISO 80000 series.
Further information about NAFS can be found at www.nafs.din.de. Amendments
This standard differs from DIN 2093:1992-01 as follows:
a) examples of designation for springs produced by turning (G) and for springs produced by fine blanking (F)
are no longer included (see Clause 4); b) Clause 4 now includes the assignment of springs to series A, B or C based on the h 0/t  ratio;
c) in Clause 7, new values of and of stresses OM III II σσσ,, have been specified;
d) the standard has been editorially revised to take account of the new style rules for standards. Quantities,
symbols, units and signs have been aligned with the International System of Units (SI) as in ISO 31. The following corrections have been made to the DIN 2093:2006-03 edition: a) Corrigendum 1 from July 2007 has been incorporated;
b) in Figure 6 (Fatigue life of not shot peened disc springs with 1,25 mm ≤ t ≤ 6 mm) the maximum stress has
been corrected to 1 250 MPa; c) the drawings have been reworked to reflect the new principles on which they are based; d) normative references have been updated.
The following corrections have been made to the DIN 2093:2013-02 edition:
a) in Table 1, column “III σ”, the value 1 419 for D e  25 disc springs in Group 2 has been corrected to 1 091; b) in Table 1, column “OM σ”, the value −1 562 for D e  25 disc springs in Group 2 has been corrected to
−1 622;  Previous editions
DIN 2093: 1957-05, 1967-04, 1978-04, 1990-09, 1992-01, 2006-03, 2013-02 DIN 2093 Corrigendum 1: 2007-07
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1 Scope
This standard specifies the set of requirements that ensure the correct functioning of disc springs. These include requirements relating to the materials and manufacturing process, tolerances on dimensions and spring forces, and also the permissible relaxation and fatigue life of such springs as a function of stress. All requirements specified here are minimum requirements. This standard covers three dimensional series of disc springs.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
DIN 2092:2006, Disc springs — Calculation
DIN 50969, Testing of high strength steel building elements for resistance to hydrogen induced brittle fracture and advice on the prevention of such fracture
DIN EN 1654, Copper and copper alloys — Strip for springs and connectors
DIN EN 10083-1, Steels for quenching and tempering — Part 1: General technical delivery conditions
DIN EN 10083-2, Steels for quenching and tempering — Part 2: Technical delivery conditions for unalloyed quality steels
DIN EN 10083-3, S teels for quenching and tempering — Part 3: Technical delivery conditions for alloy steels  DIN EN 10089, Hot rolled steels for quenched and tempered springs — Technical delivery conditions
DIN EN 10132-4, Cold rolled narrow steel strip for heat treatment — Technical delivery conditions — Part 4: Spring steels and other applications
DIN EN 10151, Stainless steel strip for springs — Technical delivery conditions  DIN EN ISO 3269, Fasteners — Acceptance inspection
DIN EN ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method
DIN EN ISO 6507-2, Metallic materials — Vickers hardness test — Part 2: Verification and calibration of testing machines
DIN EN ISO 6507-3, Metallic materials — Vickers hardness test — Part 3: Calibration of reference blocks  DIN EN ISO 6507-4, Metallic materials — Vickers hardness test — Part 4: Tables of hardness values  DIN EN ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T)
DIN EN ISO 6508-2, Metallic materials — Rockwell hardness test — Part 2: Verification and calibration of testing machines and indenters (scales A, B, C, D, E, F, G, H, K, N, T)
DIN EN ISO 6508-3, Metallic materials — Rockwell hardness test — Part 3: Calibration of reference blocks (scales A, B, C, D, E, F, G, H, K, N, T)
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3 Terms and definitions
Disc springs are annular coned elements that offer resistance to a compressive load applied axially. They may be designed as single disc springs or as disc springs stacked in parallel or in series, either singly or in multiples. They may be subjected to both static and fatigue loading, and may have flat bearings.
In this standard, disc springs are divided into three groups and three dimensional series. Classification into groups is based on the manufacturing process, which is a function of the material thickness. The assignment of disc springs to dimensional series is governed by the h 0/t  ratio.
4 Dimensions and designations
4.1 General
a) without flat bearings: b) with flat bearings:
Group 1  Group 3
Group 2
Figure 1 — Single disc spring of group 1, 2 or 3 (sectional view), including the relevant points
of loading
Designation of a disc spring of dimensional series A with an outer diameter e D  of 40 mm:
Disc spring DIN 2093 — A 40
4.2 Disc spring groups
4.3 Dimensional series
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5 Symbols, units and descriptions
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6 Spring material
Springs complying with this standard shall be made from steel as specified in DIN EN 10083, DIN EN 10089 or DIN EN 10132-4. Carbon steel shall only be used for the manufacture of group 1 springs (see also Table 4).
NOTE The design of disc springs made from steel as above shall be based on a modulus of elasticity E  of 206 000 MPa.
The modulus of elasticity and strength property of other materials (e.g. stainless steel for springs in accordance with DIN EN 10151, copper alloys (spring bronze) in accordance with DIN EN 1654) will likely be different. The values given for F  and σ in Tables 1 to 3 then cease to apply. In such cases it is recommended the spring manufacturer be consulted.
7 Spring dimensions, nominal sizes, design values
7.1 Dimensional series A
Disc springs with
t D e
≈ 18; t
h 0 ≈ 0,4; E  = 206
000 MPa; µ = 0,3
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