BELLEVILLE WASHER

These are also known as a disc spring or cupped spring washer; a Belleville washer is a unique washer-style fastener that’s characterized by a cupped construction. They feature a canonical shape in which the inner portion is higher than the lower portion. Belleville washers are used just like conventional washers by featuring a center hole through which a fastener, such as a bolt, is placed. But their unique canonical shape makes them particularly effective at handling heavy loads while also offering benefits. The purpose of a Belleville washer is to absorb loads by acting as a spring. When a load is applied to a Belleville washer, the washer compresses. At the same time, the Belleville washer exerts an equal amount of force against the object. This means Belleville washers can handle larger, heavier loads that aren’t possible with conventional washers.

Rather than using a single Belleville washer, you can use two or three Belleville washers. The stack of Belleville washers creates multiple springs, each of which acts against the objects. Belleville washers can be reused, repeatedly, as long as they are not damaged. Overloading and over-torquing these washers can wear them out over time. As long as they are used properly and checked before reuse, these fasteners can be used again and again to complete projects

Belleville spring washer stacks
Spring washers can be stacked in several structures to increase certain characteristics they produce for optimal performance.

Series stack:

A series stack involves placing the top of the washer to the bottom so that they create a gap in the middle. This can greatly increase the deflection of the stack by adding a spring-like effect to the washers.

Parallel stack:

A parallel stack involves placing all of the washers in the same direction. Each added washer increases the load capacity of the stack.

Parallel/series stack:

The mixed parallel/series stack involves performing both types of stacks in a single fastener assembly. This increases both the load and deflection and can be arranged to suit almost any situation as needed to comply with the project needs.

Advantages of using Belleville washers:

Conserve space

Serve the purpose for a longer time

Can perform in conjunction with coiled springs

Great versatility when stacked in parallel or series

Enhance the reliability of machinery

Prevent bolt failures

Maintain the positioning accuracy of ball bearings

Minimize thermal expansion

Self-damping capability

Absorbs shocks

Evenly distribute the load

Depending on the application, multiple Belleville washers can be used to create greater resistance against heavy loads. Rather than using a single Belleville washer, you can use two or three Belleville washers. The stack of Belleville washers creates multiple springs, each of which acts against the object. Belleville washers are suitable for all applications. But their canonical shape and spring-like characteristics make them ideal for handling heavy loads and absorbing vibrations.

DIN 6796, DIN 6908, DIN 137B, DIN 137A, ASTM, IS, ISO, DIN, ANSI, ASME and all international standards.