7.8.8 Silver Plating; Tracer

General: Some bearings and bushings; oil cooler solder; seals.

Silver is also used as a physical ‘tracer’ to indicate that wear has progressed to a certain point. In this application, silver is either plated directly onto a part surface or incorporated into a layer under the surface. The wear condition of the part can then be related to the amount of the tracer deposited in the oil.
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