Foreign particles on bearing back

• Locally limited deviation of the wear pattern
• Light wear point in the sliding surface
• Often particle residues / imprints on the steel back of the bearing
• In severe cases pronounced marks of mixed friction in the form of initial rubbing marks and signs of material fatigue in the bearing sliding surface are visible

Due to dirt or oil residues (carbon) at the back of the bearing, local pressure points arise, which become noticeable on the bearing sliding surface. Due to the pressure, on the inside of the bearing there is increased wear compared to the remaining areas of the bearing. This can be recognised as a noticeable, mostly bright light deviation to the wear mark. Depending on the extentof the pressure points, initial rubbing marks and seizure, as well as fatigue damage, may be the result.

Whether the bearing can still be used depends on the progress of the wear of the sliding layer. As soon as initial rubbing marks or signs of material fatigue such as cracks or nicks in the area of the pressure point occur, the bearing should be replaced, otherwise there is the threat of complete failure. Broken-off material can cause consequential damage in the same or an adjacent bearing.