Belleville Washer Spring Rate

Tensile stress σ 10 6 pa. Displaystyle r d which depends not only from the. The spring rate of a belleville washer or disc spring is the amount of force associated with a given deflection measured in lb in or n mm.

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This notation is needed for load calculations if n of springs in a stack then.

Belleville washer spring rate.

Spring deflection f 10 3 m. Modulus of elasticity e 10 9 pa. A belleville spring or washer is formed into a conical or cone shaped geometry. Spring force f n.

Performance considerations a similar device is a wave washer. The spring constant or spring rate is defined as. 888 springs 888 777 4647 fax. Belleville springs aka belleville washers spring washers or disk springs are wonderfully useful mechanical devices but with one minor drawback their properties are difficult to calculate until now almen and laszlo.

Spring thickness δ 10 3 m. The total spring coefficient for this group of belleville washers is calculated as below. 888 426 6655 id represents the washer inside diameter. N i the number of washers in the i th group.

K the spring constant of one washer. The slight or aggressive conical shape gives the washer a spring characteristic and action. Belleville springs has been trading in the spring industry for over 40 years and is a leading uk manufacturer and stockist of disc springs and belleville washers who export their products worldwide. G the number of groups.

1 spring is considered to be 1 in parallel 1 in series. Spring outer diameter d 2 r 10 3 m. Displaystyle k frac df ds belleville washer stack illustration. Spring stiffness k df df f f 10 3 n m.

This spring rate is usually very high allowing the spring to produce very large loads in a very small space. Belleville washers engineering data belleville washer stacking example. Belleville washers are typically used as springs where the spring action is used to apply a pre load or flexible quality to a bolted joint. A belleville spring is a conical shaped disc that will deflect flatten at a given rate.

T represents the washer material thickness as well as the washer solid flat height. Our stock range includes disc springs to din 2093 and din 6796 specifications bearing preload disc springs medium and light duty serrated safety. Od represents the washer. Every spring has its own spring rate depending on its geometry and material.

Displaystyle frac t t ratio but also from the flank angles of the spring. This is a minimum measurement and reflects the bolt size that the washer will accommodate. K d f d s. So a 2 3 1 2 stack or since addition is commutative a 3 2 2 1 stack gives a spring constant of 3 7 that of a single washer.

Spring inner diameter d0 2 r0 10 3 m. Belleville spring disc spring and conical compression washer are all names for the same type of spring.