Blistering? pitting? cavitation?

Heat, contaminants, excessive air in the oil, possibly electrical/static discharge

Dave

Dear JVA--- Can you share this complete bearing picture with this damage ?  Thanks.

Attached; hope it helps...

Thanks for your pictures. It seems to be eletrical pitting.

Thank you lux; based on what exactly? I was expecting more melted surfaces under the microscope and this is not shown, right?

Electrical fluting or contamination, the "frosted" appearance of the inner race points this direction. Can you provide image of surface of the rollers and both sides of the outer race

Dave

There you go; right now I dont have more pictures about it... will try to get some more.

what would be your best guess?

That's definitely not electrical fluting as some are suggesting here. More likely debris in lubricant or insuficient lubrication quality.

Hello Becar, thank you for the feedback.

To better understand, what drives you to the decission of "not electrical fluting" and "likely debris in lubricant or insuficient lubricant quality"?

Just type on google ˝electrical fluting˝, you will see very typical pattern. In your case it could also be just wearness after reaching life cycle of the bearing.

Thank you Becar for the support! really appreciated.

I was mentioning it due to the fact that most of the pictures you can see are related to ball bearing and in this case it is a cylindrical roller bearing, so not sure about the patterns. I have also read that there are different stages for it: pitting, frosting and flutting. How could I determine if this can be initial pitting? as per the picture #1 I provided at the start of the discussion, to me it doesnt look like pitting as does not have melted surfaces, right? any additional information or ideas of what can be checked out to make sure of the conclusion?

Additional information, the bearing is running in the range of 1-2 years only, so lifetime shouldnt be reached out.

Any other comment from any team member? any guideline?

Hello,

does everyone agree on this assessment? any additional guideline that can be provided?

Thanks!