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Failure Analysis:
False Brinneling Failures

Occurs when there is small relative motion between the balls/rollers and raceways during non-rotation times.

Characterized by elliptical wear marks in the axial direction at each ball/roller postioin.

When the bearing isn't turning, an oil film cannot be formed to prevent raceway wear.

Wear marks are perpendicular to the line of motion, normally well-defined, and sometimes surrounded by debris.

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