What is likely the cause for evenly spaced indentations on a bearing race?

Evenly spaced indentations on a bearing race are often indicative of the presence of chips. This condition typically arises when hard particles, like metal chips, come into contact with the race during operation. These particles can cause localized points of impact that leave distinct indentations, usually occurring at regular intervals due to the rotation of the bearing, resulting in a pattern.

Chips may come from various sources, such as debris in the equipment or wear from neighboring components. Their presence disrupts the smooth surface of the bearing race, potentially leading to further damage and reduced lifespan of the bearing.

Other factors such as fine dirt, improper seating, or forcing the bearing off with a hammer may lead to wear or damage, but they typically do not create the consistent pattern of indentations seen when chips are the culprits. Fine dirt tends to cause a different type of wear, while improper seating may lead to uneven wear rather than evenly spaced indentations. Forcing a bearing off can result in serious damage but again doesn't usually manifest as regular indentations. Understanding the specific nature and cause of the damage helps technicians address the issue effectively in future repairs.