These machines are typically made of stainless steel; they have a rotating motor, to which knives or blades are attached which shred the stems, thus reducing the volume of this part of the plant by 80 to 90%.
Once chopped, the stalks are placed in special containers for disposal.
Many companies also use a vacuum cleaner, which sucks up the chopped part of the stalks and takes them directly to the collection points to then dispose of them.
The stem crusher machine is fundamental because it manages to transform these products, which are not considered by current laws as by-products of winemaking, into material that can be disposed of or used in other ways.
In fact, once the stalks have been shredded, many farmers spread them on the ground as fertilizer. The remains of grape stalks can also be used to produce energy as they do not damage the environment or health.