The usage areas and rates of bearings, which are used for the bearing of moving shafts to fixed bodies, are increasing more and more with the development of machine technology today. There are many types of this machine element, which is indispensable in machine design. They can be produced with the most modern manufacturing methods and using high quality materials. It is very important for optimum machine design to be able to choose the right bearing in terms of type and size among many bearings. There are two types of loads specified in the catalogues of rolling bearings. Dynamic load; It is the load that occurs when the bearing makes rotational movement under load. Static load is the permanent deformation at the most stressed contact point between the rolling element and the rolling surface if the bearing is stationary or oscillating under load or if the number of revolutions is very small. In most catalogues, bearing selection is based on static and dynamic loads. Therefore, it is important to select bearings suitable for these loads. To give an example of bearings that everyone can understand, in the wheel centre of bicycles, there is a bearing on the shaft to which the rim is connected. These bearings ensure that the wheel can rotate freely around its axis by bearing the wheel shaft. At this point, the better quality and frictionless the bearing is, the easier the movement transmitted from the pedals to the bicycle will be. Translated with www.DeepL.com/Translator (free version)