Polysorb - disc springs

Spring washers are discs that can be axially loaded and are concave in the axial direction. Polysorb disc springs require less space than other spring types. They are especially suitable for designs that do not require a high spring length.

The spring length of the disc spring is relatively small. In practice, a number of disc springs are combined. Disc springs that are alternately stacked increase the spring length proportionally to the amount of springs. The total spring force is as large as the force of one single disc spring. In order to increase the force, the disc springs can be parallel stacked to form a spring packet.

Polysorb disc springs are acid-resistant against diluted lyes and very weak acids, as well as against fuels and all types of lubricants. The small moisture absorption permits the use in wet or moist environments.

Polysorb disc springs absorb moisture, which alters their mechanical properties. However, in the worst case scenario - a long-term application in water - Polysorb disc springs still have a maximum spring force of 2.24 lbs.

Increased temperatures reduce the rigidity of plastics. Polysorb disc springs still have a maximum spring force of 1.80 lbs even at the maximum permissible temperature of 176°F. The spring force in ambient temperature is shown in graph 35.2 (right).