What has to be considered for the layering of Ball Bearing Disc Springs, not slotted?

• Disc springs for ball bearings, not slotted, have a pronounced degressive spring characteristic curve
• Therefore, it is not recommended to use alternately layered disc spring columns
• In order to achieve higher forces, however, these disc springs can be stacked in the same direction; the friction effect between compression and compression (hysteresis) should be taken into account