Crankshaft Bearing Wear and Corundum Abrasive
Reflected Darkfield Illumination

Definition/Function:
This is the surface of a worn crankshaft bearing as a result of using corundum abrasive paper to clean the valves in this engine. The corundum also does damage to the cylinders but if finally causes failure in the bearings.

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Characteristic Features:


Associated Particles:
This is a close-up of the corundum abrasive particle stuck in one end of one of the groves carved by that particle.

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