Sliding Surface (Roller End / Rib / Flange / Cage)
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Straight line scratches on surface of raceways or rolling elements caused during mounting or dismounting of bearing.
Scoring is surface damage due to accumulated small seizures caused by sliding under improper lubrication or severe operating conditions. Linear damage appears circumferentially on the raceway and roller surfaces.
Cracks in the raceway ring and rolling elements. Continued use under this condition leads to larger Cracks or Fractures.