An Investigation Regarding the Impact of Running-In on Rolling Contacts Lives

Microtopography of the working surfaces subjected on rolling contact can be realized by various manufacturing technologies (lapping, polishing, turning, grinding, etc.). The aim of this work is to point out the impact of the initial surface asperities on running-in phenomenon, geometry of active surface and rolling contacts durability. At first, the article exhibit the experimental tests carried out by using the two discs AMSLER machine with proper samples for pure rolling motion. The microtopography of the working surfaces have been measured before and after tests. Secondly, a numerical study is presented for the samples used on the two discs AMSLER machine, where the measured topography data and loading conditions are used as input data in the analysis model. The last part of the article exhibit a numerical investigation for the rolling bearing CARB C2318 where the modified rating life have been computed with methodology given by ISO 16281.