Belleville Washer Spring Rate

Spring stiffness k df df f f 10 3 n m.

Belleville washer spring rate.

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. 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. This is a minimum measurement and reflects the bolt size that the washer will accommodate. Spring force f n.

Spring inner diameter d0 2 r0 10 3 m. Performance considerations a similar device is a wave washer. Spring outer diameter d 2 r 10 3 m. 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.

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. 888 426 6655 id represents the washer inside diameter. These washers have smaller outside diameters than standard spring lock washers to fit neatly under socket head cap screws. Belleville spring washer coned disc spring and conical spring washer are all names for a type of spring that is a conically shaped disc that deflects flattens at a given rate.

N i the number of washers in the i th group. Modulus of elasticity e 10 9 pa. G the number of groups. This notation is needed for load calculations if n of springs in a stack then.

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

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. T represents the washer material thickness as well as the washer solid flat height. Tensile stress σ 10 6 pa. 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.

Conical spring washers have a high spring rate resolve thermal expansion and can produce extremely high loads in a small area. Spring deflection f 10 3 m. The total spring coefficient for this group of belleville washers is calculated as below. Belleville washers engineering data belleville washer stacking example.

K the spring constant of one washer. Spring thickness δ 10 3 m.