ORIGINAL SCHNORR
DISC SPRINGS
QUICK FAQS
FEATURES
APPLICATIONS
The conical shape allows springs to be combined in different ways.
Possible spring combinations:
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For series stacks, the deflections are additive at the same force (b).
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For parallel stacks, the forces are additive at the same deflection (c).
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For combination of series and parallel stacking, various characteristic curves can be realized (d).
DISC SPRING STACKS
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A guide element is needed to prevent lateral movement.
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Inside guidance on a bolt or shaft is preferred, although outside guidance is acceptable as well.
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The guide elements and abutments should be hardened to a minimum of 60 HRC (minimum case depth of 0.8 mm), if possible.
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The surface of the guide element should be smooth and, if possible, ground down.
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For static applications, guides can be unhardened.
DISC SPRING STACKS
MATERIALS
MATERIALS
Carbon Steel
C67S (1.1231)
C75S (1.1248)
per DIN EN 10132-4
Used as cold rolled strip for group 1 disc springs;
thickness of < 1.25 mm
Alloyed steel is used in rolled condition.
For thickness: > 1.25mm
Chrome Vanadium
51CrV4 (1.8159)
per DIN EN 10151
Chromium-molybdenum-vanadium steel effective for temperatures
up to 500 C
Not corrosion resistant.
Heat Resistant
Stainless Steels
X22 CrMoV 12-1(1.4401)
per DIN EN 10269 or 10088-2
X10: Chromium-nickel alloyed steel for springs;
thickness < 3.0 mm.
X7: A precipitation-hardened steel.
*magnetic*
Corrosion Resistant Steels
X10 CrNi 18-8 (1.4310)
X7 CrNiAl 17-7 (1.4568)
per DIN EN 10151
Excellent corrosion resistance & high temperature applications
(up to 600 C)
Inconel
X718 (2.4668)
X750 (2.4669)
TOLERANCES
OVERALL HEIGHT
THICKNESS
LOAD
DIAMETER
STANDARDS
Disc springs are manufactured to the following standards:
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DIN EN 16983 – Quality requirements, Dimensions
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DIN EN 16984 – Calculation
(Formerly DIN 2092- Calculation of Disc Springs and DIN 2093 -Quality requirements, Dimensions)
