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Good day to all! Can anybody tell me what causes such circular pattern on the rolling elements and circular dull peeling pattern on the outer race? Bearings of this motor are 6315 c3.

my initial thought

1.there was a solid particle contamination.

2. Im not sure about reverse axial loading causing the circular pattern because these were deep groove ball bearings and not axial bearings

Thank you very much

Tags: Bearings, enveloped acceleration, vibration, bearing failure, compressor

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Topic Name over the pictures@Registered Member posted:

Good day to all! Can anybody tell me what causes such circular pattern on the rolling elements and circular dull peeling pattern on the outer race? Bearings of this motor are 6315 c3.

my initial thought

1.there was a solid particle contamination.

2. Im not sure about reverse axial loading causing the circular pattern because these were deep groove ball bearings and not axial bearings

Thank you very much

Looks like there was a tremendous axial load being applied, causing a heavy, 360 Degree contact with the outer race.

Why are the pictures obstructed by the Topic definition?

Thanks,

Ralph

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  • Topic Name over the pictures
RM
Last edited by Registered Member

I was about to raise same thing Ralph related to obstruction of topic. It would be better to cut the cage and see the inner ring surface as well.

IMO, It seems like abrasive wear due to inadequate lubricant and would be ended with spalling if allowed to run longer. Excessive axial load didn't allow lubricant to perform as it supposed to. Suggested lubrication frequency and quantity would be suitable for design load. However, Installation of asset, operations and behavior of the driven equipment changed the load characteristics which resulted in this failure.

RM

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