In tools weighing several tonnes, such as for presses, relief must be provided for the spring assemblies during storage. This can either be done through the use of compression springs or spring relief blocks which are made from wood, metal, or a variety of plastics.
If the relief elements are accidentally not removed before the tools are taken into operation, they can be subjected to severe stresses, particularly on the first pressing movement. This can cause them to bend or break or in the worst case, an explosive rupture can occur.
As a result the tools can be damaged, but the potential danger for employees is the greater risk here.