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SPRING 2022

Distributor's Link Magazine Spring 2022 / Vol 45 No 2

54 THE DISTRIBUTOR’S

54 THE DISTRIBUTOR’S LINK SPIROL INTERNATIONAL CORP. 30 Rock Avenue, Danielson, CT 06239 TEL 1-860-774-8571 FAX 1-860-774-2048 EMAIL info@spirol.com WEB www.spirol.com HOW TO DETERMINE THE PROPER DISC SPRING STACK CONFIGURATION by John Leckfor, Applications Engineer Disc Springs are conically-shaped precision components designed to be axially loaded. Disc Springs can be statically loaded either continuously or intermittently, or dynamically subjected to continuous load cycling. What sets Disc Springs apart from other types of springs is that deflection of the Disc at a given load is predictable making it possible to calculate the minimum cycle life. Due to their predictability, high reliability, and unparalleled fatigue life, Disc Springs are preferred over all other types of springs in critical applications such as safety valves, clutch and brake mechanisms for elevators and heavy equipment, and supports for industrial pipe systems. Disc Springs can be used individually or assembled into stacks to achieve the force-deflection characteristics required for the application. This White Paper details the different methods of stacking Disc Springs, and how to determine the proper stack configuration for a particular application. To achieve the optimal Disc Spring performance, it is best to keep the working deflection between 15% and 75% FIGURE 1 of full deflection as it is in this range that measured results most accurately match the theoretical characteristics of the Disc Spring. If a single Disc Spring is not capable of the force/deflection characteristics the application requires, Disc Springs can be stacked in series, parallel or combination to achieve the requirements (See Below: Methods of Stacking and Figure 1). Methods Of Stacking IN PARALLEL Deflection: Same as single Disc Force: Single Disc multiplied by the number of Discs IN SERIES Deflection: Single Disc multiplied by the number of Discs Force: Same as single Disc IN COMBINATION Deflection: Single Disc multiplied by the number of Discs in series Force: Single Disc multiplied by the number of parallel Discs in a set TECHNICAL ARTICLE CONTINUED ON PAGE 128

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