The bachelor thesis has been aimed for analysis of the tolerance increase of functional surfaces of mulching tools, which have been exposed to the great strokes in operation in a heterogeneous forest environment. They crush wood, rocks, and submerges the soil. Their functional surfaces with tungsten carbide teeth are coupled to the tool body. The problem is the tool material around the teeth is much rather worn than teeth themselves. Later, the teeth are broken off the place quickly and the tool is worn. As a result is insufficient processing of soil, worsening of the kinematics of the equipment, and high costs tool change.The final work has been divided into two parts, the introduction is characterized by the technology of soil treatment, the construction of mulching machines, mulching types and mechanisms of wear. Next part analyzes abrasion and influence on tools in operation. There have been described some individual ways to increase the abrasion. Particularly the method of soldering is increased, using hard-hardened materials and the selection of soldering materials.The following part has been experimental which describes the preparation of selected welds on material that is identical to the material of the mulching machine tools. Some samples are evaluated for the quality of the welds, their mechanical properties, the macro and microstructures. The discussion has been based on the results of the recommendation of suitable soldering electrodes for using in practice.