Engineering and Tolerance

Learn About: Belleville Washers

Material Information:
When your compression spring application requires a high load in a small space, 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 Belleville Washers are manufactured from 300 Series Stainless Steel. Additionally, Lee Spring Washers are passivated in accordance with specification ASTM A967 (supercedes QQ-P-35) 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).

Series:

Series-Parallel: A combination of the two

A single Belleville Spring 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 a 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:

Single: One washer

Parallel: All washers stacked the same way

Series: All washers stacked opposite each other

Series-Parallel: A combination of the two

Lee Spring Part PDF

https://www.leespring.in/sites/leespring/files/part_number_pdf/GuideLeeSpringPartNumbers2012_0.pdf