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Disc Springs: Characteristics

Disc Spring Definition

Disc Spring Characteristics

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Calculated Characteristic vs Actual Test Results

The example illustrated above is typical of most disc springs, and underlines the necessity of limiting maximum deflection to 75% to avoid sharply increasing force and stress characteristics.

As the compressed disc spring nears its 'flattened' condition, the reducing cone angle results in the movement of bearing point toward the centre, thus effectively shortening the 'lever' length and 'stiffening' the spring.

Examples of varying Cone Height / Thickness Ratios

The ability to change the force/deflection characteristic, by way of varying the cone height to thickness ratio, is a particularly useful feature of the disc spring.

Shown above are some examples of different cone height to thickness ratios, and up to a ratio of 1.5 the disc springs may safely be taken to 'flat' or stacked in columns.

Above ratio 1.5 the disc spring will adopt a regressive characteristic, and is capable of 'push-thro.' if not fully supported. Disc springs with cone height/thickness ratios above 2.0 may invert when compressed toward the 'flat' condition.

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Valley Spring Co Ltd
Pottery Lane East
Chesterfield, Derbyshire
United Kingdom S41 9BH

Valley Spring Company: Chesterfield Derbyshire

Tel: +44 (0)1246 451981
Fax: +44 (0)1246 454327

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