Disc Spring
A disc spring (also known as a Belleville washer or conical spring washer) is a compact, cone-shaped mechanical component engineered to deliver exceptionally high spring forces within minimal installation space. Widely used across precision engineering, heavy machinery, and safety-critical applications, disc springs offer reliable load absorption and consistent performance under demanding conditions.
Vivek Sawala
National Sales Manager
What Is a Disc Spring?
Understanding the Mechanics of Conical Spring Washers
A disc spring - often referred to as a Belleville spring or disc spring washer - is a thin, conical ring made from high-strength spring steel. Its unique frustum (truncated cone) geometry allows it to generate substantial axial force when compressed, even across a very short deflection path. This combination of high load capacity and low profile makes it one of the most space-efficient spring types in industrial engineering.
Unlike coil or flat springs, a disc spring stores energy through elastic deformation of its conical shape. When a load is applied along its central axis, the cone flattens, absorbing and returning energy with consistent precision. The load-deflection characteristic of a disc spring is governed by its geometry — specifically the ratio of height to thickness - and can be engineered to deliver linear, progressive, or degressive force curves depending on the application requirement.
Disc springs conform to internationally recognized standards, including DIN EN 16983 (dimensions and quality requirements) and DIN EN 16984 (calculation methods). Standard material is spring steel per DIN EN 10132-4 - commonly grades 1.1231 or 1.8159 (51CrV4) - offering an optimal balance of strength, elasticity, and fatigue resistance. For corrosive or high-temperature environments, stainless steel variants and special coatings are also available.
Three characteristic curve series define the performance behaviour of a disc spring:
- Series A - nearly linear load-deflection behaviour, ideal for precise, predictable force control
- Series B - moderately degressive, suited for moderate overload absorption
- Series C - strongly degressive, preferred where high force with large deflection is required
HENNLICH supplies disc springs conforming to all three series, ensuring the right mechanical characteristic for every engineering scenario.
Disc Spring Variants: Stackable Configurations for Every Load Requirement
One of the greatest strengths of the disc spring is its versatility through stacking. By combining individual springs in different arrangements, engineers can precisely tune both the force output and the stroke of the assembly without changing the installation envelope.
1. Disc Spring Pack (Same Direction)
When multiple disc springs are stacked in the same orientation, the resulting assembly behaves like a single, thicker spring. The total spring force increases proportionally with the number of springs in the stack. This arrangement is ideal when higher forces are required within the same axial space.
2. Disc Spring Column (Alternating Direction)
Stacking disc springs in alternating (opposing) orientations produces a column that multiplies the available spring travel while maintaining the force level of a single disc. This configuration suits applications where significant axial displacement is needed alongside a controlled load.
3. Combined Stacking A combination of same-direction packs and alternating columns allows engineers to simultaneously adjust both force and travel, achieving highly customized spring characteristics for complex mechanical systems.
Guidance and Lubrication For reliable performance - especially in alternating arrangements — HENNLICH recommends using guide pins or guide sleeves to maintain alignment under load. Alternating stacks should be adequately lubricated and assembled with springs facing outwards to minimize friction-induced wear and ensure consistent performance over the component lifecycle.
Manufacturing Groups (DIN EN 16983)
| Manufacturing Group | Plate Thickness | Contact Surface |
|---|---|---|
| Group 1 | t < 1.25 mm | Without |
| Group 2 | t ≥ 1.25 mm to ≤ 6.00 mm | Without |
| Group 3 | t > 6.00 mm | With |
In addition to standard DIN disc springs, HENNLICH offers custom-dimensioned disc spring washers produced to factory standards, drawings, or customer-specified technical requirements.
Key Advantages of Disc Springs: Why Engineers Prefer Conical Spring Washers
Disc springs have earned a dominant position in precision mechanical design for good reason. Their unique combination of properties addresses engineering challenges that conventional spring types simply cannot solve as efficiently.
High Force in Compact Space
The defining advantage of a disc spring is its ability to deliver very high spring forces from an extremely small installation volume. Where coil springs would require significantly greater axial length, a disc spring or disc spring stack achieves equivalent or superior load performance within a fraction of the space.
Precise Load-Deflection Control
Depending on the selected series (A, B, or C) and the stack configuration, engineers can precisely engineer the force-deflection curve. This level of predictability is critical in safety valves, clamping systems, and precision instrumentation, where load consistency is non-negotiable.
Long Service Life and Fatigue Resistance
Manufactured from high-quality spring steel (e.g., 51CrV4 / 1.8159) and optionally surface-treated or made in stainless steel, disc springs withstand millions of load cycles with minimal performance degradation - making them highly reliable for maintenance-sensitive industrial environments.
Stackable and Scalable
No other standard spring type offers the same degree of configuration flexibility. By varying stacking direction and quantity, a single disc spring design can be adapted to cover a broad range of force and travel requirements without requiring a new component.
Material and Surface Options
Standard Spring steel handles the majority of applications, while stainless steel disc springs address corrosion or elevated-temperature requirements. Special surface treatments and coatings are available for extreme environments.
Consistent Quality and Standards Compliance
HENNLICH disc springs are manufactured in full conformance with DIN EN 16983 (dimensions) and DIN EN 16984 (calculation), ensuring dimensional accuracy, reliable material values, and documented quality for regulated industries.
Where Are Disc Springs Used? Industrial Applications of Disc Spring Washers
The disc spring's combination of compactness, high load capacity, and configurability makes it indispensable across a wide range of industries and mechanical systems.
Mechanical Engineering and Machine Tools - Disc springs are widely used in clamping systems, tool holders, and spindle assemblies in CNC and precision machine tools. They maintain consistent clamping force under thermal expansion and vibration, ensuring dimensional accuracy and operational safety.
Couplings and Clutches - In power transmission equipment, disc spring washers act as preload elements in dry clutches and mechanical couplings, maintaining contact pressure and compensating for wear over the component's service life.
Pressure Relief and Safety Valves - Safety valves in hydraulic, pneumatic, and process engineering systems depend on disc springs for their defined opening and closing forces. The degressive characteristic (Series C) is particularly suitable here, providing a sharp response at the set pressure threshold.
Automotive and Commercial Vehicles - Disc springs are found in gearbox synchronizers, brake systems, and suspension components where space is limited but consistent spring force is essential for performance and safety.
Aerospace and Defence - The high strength-to-weight ratio and reliability of disc spring washers under extreme load cycles make them suitable for aerospace-grade fastening and actuator systems.
Bolted Joints and Flange Connections - Used as preloaded washers under bolt heads or nuts, disc springs compensate for thermal expansion, bolt creep, and settling in flange connections - maintaining bolt load over extended service intervals.
Energy and Power Generation - In turbines, generators, and pipeline systems, disc springs ensure consistent contact pressure in sealing elements and shaft bearings, contributing to operational efficiency and reduced downtime.
HENNLICH serves customers across all these sectors from its operations in Pune, Maharashtra, with fast delivery from extensive stock and the ability to produce custom disc spring solutions to order.
About HENNLICH: Your Trusted Partner for Springs and Industrial Components in India
HENNLICH is a leading European industrial supplier with deep expertise in mechanical components, sealing technology, lubrication systems, and hydraulic solutions. Operating globally through the HENNLICH Group and locally through HENNLICH Private Limited - headquartered at MIDC Pimpri Chinchwad Industrial Area, Pune, Maharashtra - the company brings decades of engineering knowledge directly to the Indian industry.
For disc springs and spring technology, HENNLICH offers an extensive, ready-to-ship product range covering standard DIN sizes across all manufacturing groups and characteristic series. Beyond standard catalogue items, HENNLICH engineers work closely with customers to develop custom-dimensioned disc spring washers tailored to specific load, travel, temperature, and corrosion requirements.
What sets HENNLICH apart is its commitment to quality at every step: from raw material selection (spring steel per DIN EN 10132-4) through dimensional verification to documented material values - each disc spring shipped meets or exceeds the requirements of DIN EN 16983 and DIN EN 16984.
Whether you need a single spring for a prototype, a large-volume production run, or expert consultation on spring stack design, HENNLICH India delivers the right solution, reliably and on time.
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Frequently Asked Questions
A disc spring is a conical ring-shaped spring made from high-strength spring steel, designed to deliver high axial force within a very compact installation space. It is also commonly referred to as a Belleville washer or conical spring washer.
The terms are often used interchangeably. A disc spring washer typically refers to the same conical component used as a preloaded element under bolt heads or nuts to maintain clamping force and compensate for bolt settling and thermal expansion.
Stacking disc springs in the same direction (a disc spring pack) multiplies the spring force while keeping travel the same. Stacking them in alternating directions (a disc spring column) increases the total spring travel while the force remains approximately equal to a single spring. Combinations of both arrangements allow independent tuning of force and travel.
HENNLICH disc springs conform to DIN EN 16983 (dimensions and quality requirements) and DIN EN 16984 (calculation methods), ensuring full dimensional and mechanical reliability for engineering applications.
Yes. In addition to standard spring steel (e.g., 51CrV4 / 1.8159 per DIN EN 10132-4), HENNLICH offers disc springs in stainless steel for applications requiring corrosion resistance or elevated operating temperatures.
Absolutely. Beyond the standard range, HENNLICH manufactures disc springs to customer drawings, samples, or technical specifications — including non-standard diameters, thicknesses, and material grades.
Disc springs are used across mechanical engineering, automotive, aerospace, power generation, hydraulics, process engineering, and precision instrumentation - wherever high spring force is needed in limited space.
Key selection parameters include the required spring force, available installation space, deflection (stroke), operating temperature, and environmental conditions (e.g., corrosion risk). HENNLICH's technical team can assist with Spring Stack design and specification for your specific requirements.
Disc springs comply with DIN EN 16984 (calculation) and DIN EN 16983 (dimensions, quality requirements).
| Manufacturing group according to DIN EN 16983 | plate thickness | Contact surface |
|---|---|---|
| Group 1 | t < 1.25 mm | without |
| Group 2 | t ≥ 1.25 to ≤ 6.00 mm | without |
| Group 3 | t > 6.00 mm | with |
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