Nowadays, the notch problems and their influence on component durability are the issue of investigation. For many manufactured components, we find various types of notches, such as grooves, step and holes. They have a tendency to be in the place where stress is concentrated, the so called macroscopic stress concentrator. This area is a dangerous part of a component. Nowadays, there are hypotheses that are based on the assumption that the higher the roughness, the lower the durability. In many cases the designers prescribe unnecessarily high surface quality. It is necessary to maintain adequate quality of the surface, and also it is necessary that the component has attained a high durability. The paper deals with the influence of machining technology carrying capacity of notched components. As the test material steel Fe510 was used according to EN ISO (11523, according to CSN 42 0002).