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Belleville Washers

belleville

High Loads in Small Spaces

When your compression spring application requires a high load in small spaces, Lee Spring's Belleville Washers can be the solution. Their conical configuration enables them to support high loads with relatively small deflections and solid heights compared to helical springs. Belleville Washers are often used to solve vibration, thermal expansion, relaxation and bolt creep problems.

Lee Spring Standard Series Belleville Washers are manufactured from 300 Series Stainless Steel. Additionally, Lee Spring Standard Series Belleville Washers are passivated in accordance with specification ASTM A967 (supercedes QQ-P35) to remove contaminants and further improve resistance to corrosion. 300 Series Stainless Steel is slightly magnetic and is recommended for applications with temperatures up to 500°F (260 °C).

The Lee Spring DIN Belleville Washer Series offers metric disc spring washers to meet global demand for sizes specified by DIN 2093.  Lee Spring also expand on size options past DIN 2093’s standard size tables, made to DIN manufacturing and quality specifications to provide component flexibility for product designers. DIN Belleville Washers are made with 51CrV4 spring steel (AISI 6150) and finished with a phosphate and oil surface for general protection from corrosion. 

DIN Belleville Washer Series designs are classified into three groups based on the material thickness:

Group 1 – This range applies to disc spring washers with material thickness less than 1.25mm.  Lee Spring DIN Belleville Washer Series include 88 sizes in Group 1, over a selection of outside diameters from 6mm (0.236”) to 40mm (1.575”) with inside diameters from 3.2mm (0.126”) to 20.4mm (0.803”).

Group 2 – This range applies to disc spring washers with material thickness from 1.25mm through 6mm.  Lee Spring DIN Belleville Washer Series include 161 sizes in Group 2, over a selection of outside diameters from 20mm (0.787”) to 200mm (7.874”) with inside diameters from 10.2mm (0.402”) to 102mm (4.016”).

Group 3 – This range applies to disc spring washers with material thickness over 6mm through 14mm.  Lee Spring DIN Belleville Washer Series include 41 sizes in Group 3, over a selection of outside diameters from 100mm (3.937”) to 250mm (9.843”) with inside diameters from 51mm (2.008”) to 127mm (5.000”).

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Single: One Washer

 
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Parallel: All washers stacked the same way to increase load

 

Series: All washers stacked opposite each other to increase deflection

 
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Series-Parallel: A combination of the two

 

Belleville Washers in Use and Stacking

A single Belleville Washer has a specific load for a given deflection. Two washers stacked in parallel will yield double the load of a single washer for the same deflection; three washers will yield triple the load; four washers will yield four times the load, etc. Alternatively, two washers stacked in series will yield double the deflection of single washer for the same load; three washers will yield triple the deflection; four washers will yield four times the deflection, etc. Various series-parallel combinations therefore can provide a wide variety of combined results of load versus deflection for the stack. Consequently, depending upon the application, the designer can:

  • Stack in "parallel" to increase load
  • Stack in "series" to increase deflection
  • Adjust the load and deflection of a washer stack by adding or removing individual washers and/or the sequence in which they are used, whether in series or parallel

Lee Spring Belleville Washers are listed with calculated Loads at Flat. The Load Deflection Chart can be used to approximate intermediate loads.

Additional load flexibility can be achieved by stacking Belleville Washers in various configurations. As shown in the diagrams below, Belleville Washers can be used in four different ways.

Load Deflection Diagram

load deflection diagram

 

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