The issues of durability of bearing assemblies in car transmissions, which are largely determined by the wear of bearing seats due to fretting corrosion, are considered. It has been established that their restoration with polymeric materials can completely eliminate fretting corrosion, significantly increase the service life of bearing assemblies and reduce the cost of car repairs. The durability of the restored fit depends on the resource of the polymer layer between the mating surfaces of the parts of the bearing assembly, and therefore the study of the endurance of new polymeric materials under cyclic loading is an urgent issue. t was revealed that a common drawback of the known methods of fatigue testing is the limited suitability for specimens of various sizes (scale factor). A review and analysis of fatigue testing methods was carried out and, as a result, the following were selected: the Lokati method, the one-sample method, the Kudryavtsev method, the Kravchenko method, the Shubin method. A new method of accelerated bench tests for the endurance of polymer materials is proposed, which is based on the methods of Shubin and Kravchenko. Initially, the durability of polymer fits under cyclic loading is determined with three specified values of the thickness of the polymer coating. The maximum allowable thickness of the polymer fit should be determined by extrapolation of the graphical dependence until it intersects with the ordinate axis (coating thickness). The method includes calculating and using the original similarity criterion, which will allow using the results of bench tests to determine the maximum allowable thickness of the polymer fit for any type of rolling bearing size. The control experiment confirmed the objectivity and correctness of the new method.