Both spring washers and Belleville washers are conical shaped spring washers typically made from spring steels and designed to be axially loaded. Both can provide a higher degree of force in a relatively compact area compared to coil springs or wave springs.
Although the terms “Disc Springs” and “Belleville Washers” are often used interchangeably, there are technical, design and application differences between the two products:
Belleville washers are primarily used in heavy duty bolt-fastened applications where the load is considered static. Disc springs can be statically loaded continuously or intermittently, or dynamically subjected to continuous load cycles. Unlike Belleville washers, disc springs are designed specifically to provide a reproducible force-stroke relationship and have long, predictable fatigue life in dynamic or cycling applications.
Disc springs are commonly used in a variety of applications including pressure controls and regulators, vehicle braking systems, valves, shock absorbers, clutches, friction assemblies, and seals where cycles occur. thermal / weight. Disc springs can be used as a single piece or combined in different stack configurations to achieve desired force-deflection performance.
A defined list of standard disc spring sizes and associated load and deflection characteristics can be found in DIN EN 16983 (formerly DIN 2093).
Selecting the most appropriate Disc Spring or Disc Stack configuration can be difficult. It is recommended that designers work with experts in disc spring application engineering to determine the optimal disc spring for a particular application.
For more information on the fatigue life of spring disks, read the SPIROL white paper: How to Calculate Estimated Fatigue Life of Spring Disks.
Consult the SPIROL Disc Spring Design Guide for specifications and useful tips for design engineers, or download 2D / 3D drawings for your assembly from Shop.SPIROL.com.
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Nicholas Bunt is a Product Specialist at SPIROL International Corporation