Design information for engineers, such as spring calculation formulas,

which are the basis of spring design, can be found here.

- Tokai Spring HOME
- Spring Design
- Conical Springs: Calculation Examples

Springs

For example, suppose you want to calculate the load at the two conditions below for a conical spring with the following specifications: Material: SWP-A, Upper center diameter: φ10.5, Lower center diameter: φ18.5, Number of active coils: 4, Total number of coils: 6, Free height: 15 mm.

(1) Load when spring height is 9.72 mm

(2) Load when spring height is 7.56 mm

(1)

With a conical spring, the coils or a coil and a support plate come into contact with each other as they compress, but in the case of this spring, no contact occurs at the height of 9.72 mm.

Thus, from the formula above, the following formula is obtained.

When the spring height is 9.72 m, the calculated load is 19.99 N.

(2)

By the time this spring is compressed to a height of 7.56 mm, it is at its solid height.

According to the formula above, as 0 < 0.33, the spring is at its solid height.

From the formula above, the following formula is obtained.

When the spring height is 7.56 mm, the calculated load is 33.87 N.