Belleville Washer Spring Rate

A belleville washer or disc spring is a conical shaped spring with an open center.

Belleville washer spring rate.

A belleville spring or washer is formed into a conical or cone shaped geometry. The slight or aggressive conical shape gives the washer a spring characteristic and action. K the spring constant of one washer. Tensile stress σ 10 6 pa.

A belleville washer also known as a coned disc spring conical spring washer disc spring belleville spring or cupped spring washer is a conical shell which can be loaded along its axis either statically or dynamically. A belleville washer is a type of spring shaped like a washer it is the frusto conical shape that gives the washer its characteristic spring. 888 426 6655 id represents the washer inside diameter. Spring stiffness k df df f f 10 3 n m.

G the number of groups. Modulus of elasticity e 10 9 pa. Because belleville washers can bear a much larger load relative to its deflection rate than a coiled spring they are ideal for cushioning heavy loads with short motion. Belleville spring lock washers also known as conical washers these have a slightly cupped shape that gives them spring like flexibility to grip tighter than split and tooth lock washers.

This notation is needed for load calculations if n of springs in a stack then. This is a minimum measurement and reflects the bolt size that the washer will accommodate. N i the number of washers in the i th group. Spring force f n.

Od represents the washer. The total spring coefficient for this group of belleville washers is calculated as below. Conical spring washers have a high spring rate resolve thermal expansion and can produce extremely high loads in a small area. 1 spring is considered to be 1 in parallel 1 in series.

Spring deflection f 10 3 m. Belleville washers engineering data belleville washer stacking example. 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.

Spring outer diameter d 2 r 10 3 m. Performance considerations a similar device is a wave washer. It is shaped much like a washer and is typically smaller than a coiled spring. Spring thickness δ 10 3 m.

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. These washers have smaller outside diameters than standard spring lock washers to fit neatly under socket head cap screws.