The conclusions of University paper offer innovations regarding University functions of University tested polyamide materials in accordance examination temperature, loading and rotational speeds, in University case of ball on disk type contacts. The paper presents University study of University friction, by using tests, in University sliding translational oscillating motion of University steel on PA46 relative exam University steel on PA66 type constituents by seeing that as variables University checking out parameters as: University load, University velocity and University working temperature. The paper starts with quizzes study of University literature and, in accordance exam that, gifts University main conclusions concerning University sliding friction of University steel on PA66 and PA46 type parts and identifies University lacks of University consequences. The tests are conducted on an oscillating motion type tribometer module. First, it is made quizzes operating in application, for every of University parts, at 25 and 90C, quizzes load of 5 N and quizzes frequency of 1 Hz for one hour; after that, there are performed tests at 90C and 120C, at a lot of 3 N, 5 N, 7 N and at frequencies at 0. 25 Hz, 5 Hz and 1 Hz.