What has to be taken into account when stacking Disc Springs?

The best disc spring arrangement is that which uses the smallest possible number of disc springs.

The friction increases as the number of disc springs in the stack increases. Therefore, in the case of multiple layers for dynamic operation, no more than 2 to 3 springs should be used in parallel.

As a guide value for stack length=Lo we recommend:

• Lo<=3*Da where the outside diameter=Da. If a greater length cannot be avoided, the stacks should be subdivided by rigid intermediate washers
• Guidance of the disc springs should take place on the inside or the outside; the hardness of the guide mechanism, at 55 to 56 HRC, should exceed that of the disc springs