EXPLANATION OF THE TABLES

The tables list the springs to DIN 2093 as well as those to Schnorr Works Standards. Those to DIN 2093 are shown separately and also amongst the standard tables in bold type. The prefex A, B and C show the corresponding series. 

The article number quoted is for normal manufacture from spring steel with phosphate finish.

Article Reference

Reference for a Disc Spring with D_e = 40mm. 

D_i = 20.4mm and t = 1.5mm: Disc Spring 40 x 20.4 x 1.5

Or for a spring to DIN 2092: Disc Spring DIN2093-B 40

Or with the article number: Disc Spring 012800 

Load and Stress Specifications

The load and the corresponding stresses are given
for the four points s = 0.25 h_o, s = 0.50 h_o, s = 0.75 h_o. This allows the relevant graphs for loads and stress to be accurately drawn.

At 0.75 h_o, DIN 2093 quotes rounded values for the deflection s. Spring Load F and the corresponding stress s are calculated exactly for the rounded values. The quoted stress at s = 0.75 h_o is the tensile stress on the underside at point II or III whichever is the greater.

Static or infrequently loaded springs may be compressed to the flat condition. It should be noted that from s = 0.75 h_o the actual characteristic progressively increases from that calculated.

For dynamic application the calculation in 'Permissible stress for dynamic loads' must be completed. With the help of the drawn graph for stress and the fatigue life diagrams (figures 18-20) the expected dynamic life may be obtained without calculation.

All values are based on a Young’s modulus ‘E’ of 206000 N/mm² with μ = 0.3 and are therefore only valid for Disc Springs from spring steel to DIN EN 10132-4 and DIN 17221 (e.g. 51 CrV 4 or C67S). The use of other materials necessitates recalculation with the correct value for Young’s modulus ‘E’. For lower tensile strength the free height h_o and overall height I_o must be amended.

When considering the use of special sizes or springs from special materials we recommend you leave the work to us. We will be pleased to go through the necessary calculations quickly, at no cost and advise you of the possibilities of manufacture.