In the article, using the theory of elastohydrodynamic lubrication, dynamic characteristics have been extracted for roller bearings. The meaning of dynamic characteristics is equivalent stiffness and damping. These specifications are used for dynamic rotor analysis and their vibration calculations. Elastohydrodynamic lubrication studies the behavior of the oil layer between the moving components of mechanical rotating systems. The shape of the oil film is determined by the geometry of the components in contact and the properties of the oil. If the applied pressure inside the oil layer is large enough, the deformation will be due to the contact of the elastic components and will affect the shape of the oil layer. Since the shape of the oil layer in this case depends on the elastic deformation of the surfaces in contact, to check the thickness of the oil layer and the corresponding pressure distribution, it seems necessary to check the contact mechanics between the surfaces and their elastic deformation. In the following report, by dividing the type of contact into two linear and point states, the corresponding equations of the oil thickness are obtained with the help of the Reynolds equation, and the corresponding pressure distribution is obtained.