Disc Springs

Verified by Mel Sykes, Industrial Supply Chain Specialist - April 2026

Specification	Details
Types	Series A (small deflection, high force), B (medium), C (large deflection)
Standards	DIN 2093, BS 1898
Materials	50CrV4 spring steel, stainless steel
Stacking	Parallel (multiply force), series (multiply deflection)

## What are Disc Springs? Disc Springs, also known as belleville washers, are conical or curved washer-like springs that provide precise spring force and deflection in mechanical assemblies. ### Types and Variants Disc Springs come in different types based on their intended use: - **Series A:** Small deflection, high force. Suitable for applications requiring a compact space but needing significant load capacity. - Dimensions: Typically between 10mm to 45mm diameter. - Load ratings: Up to 20kN at maximum deflection. - **Series B:** Medium deflection and medium force. Ideal for general use where moderate spring rates are required. - Dimensions: Usually from 30mm to 80mm in diameter. - Load ratings: Varying up to 15kN depending on the stack configuration. - **Series C:** Large deflection, low force. Best suited for applications that require a high degree of movement within a limited load range. - Dimensions: Ranging from 45mm to 100mm in diameter. - Load ratings: Up to 8kN at full travel. ### Materials and Specifications Disc Springs are available in various materials, each suited for different environments: - **Spring Steel (50CrV4):** High-strength steel with excellent spring properties. Suitable for high-load applications up to 600°C. - Standards: DIN 2093, BS 1898. - **Stainless Steel:** Corrosion-resistant and suitable for environments requiring chemical resistance or hygienic conditions. - Grades: A2-70 stainless steel is common. - Standards: EN 1.4401 (X5CrNiMo17-12-2). ### Selection Criteria Choosing the right Disc Spring involves considering several factors: - **Load and Deflection:** Determine the required load at a specific deflection using manufacturer's charts or software tools. - **Environmental Conditions:** Select materials based on temperature and chemical resistance needs. Stainless steel is preferred for high humidity or corrosive environments. - **Stacking Configuration:** Parallel stacking increases force while series stacking increases deflection. ### UK Suppliers MLC lists verified suppliers from Companies House, ensuring reliability: - **CBM Group Ltd** - **BIAFD Limited** - **BTMA Ltd** - **BPMA Member Companies** These companies offer a range of Disc Springs made to meet international standards like DIN 2093 and BS 1898. ### Common Applications Disc Springs find use in various mechanical assemblies: - **Pump Components:** Used for shaft locking, providing consistent torque. - **Valves:** Ensuring tight seals under fluctuating pressures and temperatures. - **Gearboxes:** Serving as tensioners to compensate for component wear over time. - **Automotive Suspension Systems:** Offering precise load control for ride comfort. - **Aerospace Sealing Mechanisms:** Providing reliable sealing in high-pressure environments. By selecting the right Disc Spring based on your specific requirements, you can enhance the performance and longevity of mechanical systems.