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Disc Springs

Disc Springs are conically-shaped precision components designed to be axially loaded. Disc Springs are often incorrectly referred to as belleville disc springs, belleville springs, belleville washers or simply conical washers.  Disc Springs are unique and differ from other types of springs in that the force/deflection curves of Disc Springs are consistent and repeatable, and the minimum fatigue life can be reliably determined (per the standardized calculations of DIN EN 16984 (formerly DIN 2092)). Disc Springs can be statically loaded either continuously or intermittently, or dynamically subjected to continuous load cycling. They can be used singly or in multiples stacked parallel, in series or in a combination thereof to achieve the desired force-deflection characteristic.

Disc Springs are preferred over other types of springs (such as coil springs, belleville washers, belleville springs and conical washers) when used in critical applications such as safety valves, clutch & brake mechanisms for elevators, and supports for industrial pipe systems due to their predictability, reliability and unparalleled fatigue life.

The advantages of Disc Springs compared to other types of springs include the following:

  • A wide range of load/deflection characteristics
  • High load capacity with small deflection
  • Space savings – high load to size ratio
  • Consistent performance under design loads
  • Longer fatigue life
  • Inherent dampening especially with parallel stacking
  • Flexibility in stack arrangement to meet your application requirements

SPIROL offers the full range of DIN EN 16983 (formerly DIN 2093) Group 1 and 2 Disc Springs in Series A, B, and C.  In addition to the DIN specified sizes, SPIROL stocks its own standard size range in outside diameters from 8mm to 200mm in order to meet the diverse needs of its customers. SPIROL standard Disc Springs meet all material, dimensional tolerance, and quality specifications as laid out in DIN EN 16983 (formerly DIN 2093) but in diameter and thickness combinations that are not included in the DIN standard.

SPIROL also offers a line of austenitic Stainless Steel Disc Springs.

SPIROL supplies single Disc Springs, as well as pre-stacked Disc Springs in custom configurations, packaged in shrink wrap with a perforated tab for easy of assembly.

Select from our expansive standard offering, or take advantage of our complimentary Application Engineering support and allow us to work with you to help determine the most appropriate Disc Spring or Disc Spring Stack for your specific application and assembly needs!

Disc Spring Types

SPIROL’s Disc Spring offering consists of 1) Disc Springs per DIN EN 16983 (formerly DIN 2093) , 2) SPIROL standard Disc Springs with outside diameters ranging from Ø8mm to Ø200mm  designed around the standardized calculations of DIN EN 16984 (formerly DIN 2092),  3) Austenitic Stainless Steel Disc Springs and 4) Pre-Stacked Disc Springs.

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Need help choosing the right high-quality and effective fastening for your application? SPIROL's expert engineers can design the most cost-effective Disc Spring solution for your application. Let us help!

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High carbon and alloy steel materials provide excellent strength and endurance life in most applications. The standard coating of zinc phosphate and oil provides adequate protection from humidity and occasional moisture. More effective protective finishes are available, but these tend to wear off in Dynamic applications.

Electroplated finishes should always be avoided. Hydrogen embrittlement poses too great of a risk in highly loaded Disc Springs having a hardness over HRC 40. Austenitic stainless steel is a very good choice for static and low cycle applications. It provides high forces and excellent corrosion resistance. This material will continue to work harden with use so cycle life is limited, but creep resistance is good.

For dynamic applications where corrosion protection is required, precipitation hardening stainless steels are recommended. These steels are nearly as strong as the standard Disc Spring materials and very corrosion resistant.
At temperatures over approximately 200°F (100°C), standard Disc materials can begin to creep, or take a set. Between 300°F - 400°F (150°C - 200°C) the materials lose their strength and are no longer considered viable. Stainless steels are a bit more temperature resistant, but only up to 575°F (300°C).

Full Specifications
THICKNESS <1.25mm 1.25mm up to 6mm
MATERIAL B  Carbon Steel
C67S (1.1231) / UNS G10700
W  Alloy Steel
51CrV4 (1.8159) / UNS G61500
HARDNESS HV 425-510 (HRC 43-50) HRC 42-52 (HV 412-544)
FINISH R  Zinc Phosphate and Oil


SERIES A De / t ≈ 18 ho / t ≈ 0.4
SERIES B De / t ≈ 28 ho / t ≈ 0.75
SERIES C De / t ≈ 48 ho / t ≈ 1.3


MATERIAL D  SAE 301 Stainless Steel Full Hard
(X10CrNi18-8 No 1.4310 / UNS 30100)
FINISH K  Plain finish, not oiled


TO ORDER: Product Code / De / Di / t / Material / Finish 
EXAMPLE: DSC 25 x 12.2 x 0.7 BR    

Design Guidelines

SPIROL has outlined general design guidelines to help select the most appropriate Disc Spring or Disc Spring Stack configuration for your application. Factors to take into consideration when selecting the proper Disc Spring or stack of Disc Springs are forces, working parameters, environment, duty cycle, and required life. SPIROL offers design guidelines for:

  • Sizing and Selection
  • Fatigue Life
  • Materials & Finishes
  • Orientation

Access Disc Spring Design Guidelines

SPIROL provides complimentary Application Engineering support to not only help you select the most appropriate Disc Spring or Disc Spring Stack for your specific application, but to also help you design your assembly to achieve the desired performance for the life of the project. Feel free to contact us at any time to engage our Application Engineering Team!

Design Guidelines


Stacking individual Disc Springs provides the designer with:

  • A wide range of possible force/deflection combinations;
  • The ability to design application specific load curves – both progressive and regressive; and
  • The opportunity to design a range of dampening characteristics into the design.

Methods of Stacking

Consideration needs to be given to the friction between the parallel Disc surfaces. A reasonable allowance is 2–3% of the force for each sliding surface – a greater force for loading and a lesser force for unloading. Disc Springs in parallel should be well lubricated and it is suggested that the number of Discs in a parallel set be limited to a maximum of 4 to reduce the deviation from calculated to measured characteristics. Disc Springs in parallel have increased self-dampening (hysteresis) characteristics.

Stack Construction

It is normally desirable to have both ends rest on the larger outer edge of the Disc. With an uneven number of pairs in a stack, this is not possible. In this case, the end resting on the outer edge should be arranged to be on the end on which the force is applied – the moving end of the stack.

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Local Design, Global Supply.

SPIROL has Application Engineers throughout the world to assist you in your designs, supported by state-of-the-art manufacturing centers and worldwide stocking facilities to simplify the logistics of delivering your product.

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