Sectors

Failure of slewing crane bearings

assigment3_slewing crane bearings

Evidence of failure was identified when loading operations at an open water anchorage unusual sounds were heard from the damaged crane.

The investigation showed spalling of the bearings contact surfaces as a result of a rolling contact fatigue mechanism. The bearings had already consumed about 45% of their predicted fatigue life duration but excessive loads have caused premature fatigue failure of the contact surfaces due to repeated heavy loadings of the rolling elements on the raceway.

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