A detailed experimental study is, herein, presented to demonstrate the effect of most contributing parameters on the trend of wear variation. Results attained show the effects of applied loads, speed and frictional work on wear rate for different interacting materials . Micrographs are taken to investigate surface changes under various mater-ials combinations at different operating conditions. The results showed that softer materials usually transfer to the harder, and transition from mild to severe wear is affected by the magnitude of load and speed. Results have shown that wear rate is functionally dependent on the appli-ed load and a proposed speed (sliding/rolling) parameter. A wear rate formula could thus be formulated to identify a basic wear coefficient and a limit beyond which mild followed by severe wear would occur.