koparce jednoczerpakowej F250H. W artykule przedstawiono charakterystyki nośności statycznej badanego łożyska zależne od kierunku działania obciążeń promieniowych względem wektora momentu wywrotnego, co w dotychczasowych pracach nie było rozważane. Dodatkowo do oceny własności użytkowych bieżni łożyska zaproponowano wykorzystanie metod statystycznych. Parametry rozpatrywanego łożyska oraz wartości uzyskanych wielkości statystycznych zestawiono w tabelach. Całość badań prezentowana w publikacji obejmuje wykorzystanie metody elementów skończonych, równań opisujących mechanikę kontaktu układu kulka-bieżnia oraz elementy statystyki do rozwiązywania problematyki łożyskowań.

type F250H. The static carrying load curvatures of the slewing bearing which are depend on direction acting the radial loads relative to the vector of tilting moment were shown, what in previous works wasn't considered, Additionally to evaluation of functional properties of the bearing raceway the statistics methods were used, The parameters of the considering bearing and the values obtained of statistic quantity have been contained in the tables. The whole study that are presented in the publication involves the use of finite element method, the equations of contact mechanics for ball-race way and statistic method to solving the bearing problems.

A static limiting load curve of the slewing bearings describes ranges of the allowable loads, which the bearing can be safely carried for assumption by a manufacturer durability. The static carrying capacity of a slewing bearing describe the relationship between a tilting moment M and an axial force Fa for assumed a value of a radial force Fr. The article concerns problems related to catalo selection of rolling bearings which are loaded the large radial forces which may by differently directed in relation to a tilting moment's vector. Manufactures of the slewing bearings mostly does not present in product catalogs of a static limiting load curve, which have taken into account an action the radial forces. According to an INA company, the radial forces are reduced to determining an equivalent tilting moment and an equivalent axial force. In this work, the static limiting load curves have been determined based on the FEM models, the equations of contact mechanics for the ball and the bearing raceway. The models were performed by use the ADINA system. Juxtaposition of results obtained on a basis of method's INA company and own model have been presented in form the static limiting load curves. The object of the analysis was the one row ball slewing bearing, domestic production, which is used in excavator type F250H.

type F250H. In order to carry out the evaluation of functional properties of the bearing raceway the statistics methods were used. The parameters of the considering bearing and the values obtained of statistic quantity have been contained in the tables. Calculations were performed by using the finite elements method (FEM), ADINA program, analytical Eschmann's formulas and classical mechanics equations.

ball-raceway was developed. Results of calculations which are presented in the paper were obtained by using a model of twin slewing bearing described in a separate publication. Nascent conditions of rolling resistance in slewing bearing were specified. The paper presents importance of radial forces as a component of the external load of slewing bearing. The results of numerical analysis of changing friction torque of twin slewing bearing caused by external load were submitted. In especially action of radial forces on the slewing bearing has been taken into account. The values of fraction torque were shown on the background of static limiting load curve for the slewing bearing which was considered. The original numeric method was used to determine the fraction torque for slewing bearing. Calculations were performed by using the finite element method, ADINA program, analytical Eschmann formulas and classical mechanics equations.