Figure 7. Numerical and graphical values of EDS analysis taken from the entire region or some parts of fracturing area of the bearing shell material The generator guide bearing shell ring used in the shaft bearing is structurally low carbon steel. It is a material with low risk of fracturing due to its ductility. However, in order for the ring to be passed around the shaft tightly, heat is applied and the material is expanded. After the expanding ring is placed around the shaft, it is ensured that the material works together with the shaft as a result of contact with the shaft and cooling depending on the ambient conditions. The bearing shell rings are made of large-sized parts so they cannot be subjected to heat treatment. Before mounting to the system, by using the oxyacetylene tubes the ring is heated by blowing the flame with the help of blowers. This cannot be applied to the entire ring at the same time but it is applied locally. Therefore, one region is exposed to heat while the other zone is not affected by heat. For this reason, dislocations occur in the locally heated part due to structural differences. Internal stresses in the material are thought to cause regional fractures. Fatigue is one of the most important reasons for the formation of fractures in materials that should not be ignored. The bearing shell ring can be exposed to varying loads in terms of operating conditions and may cause fracture formation due to prolonged use.