Micropitting of Bearings and Gears in Aviation
The intent of this SAE Aerospace Information Report (AIR) is to summarize and review the E34 committee’s efforts to educate the aerospace propulsion lubrication community on the science of micropitting, its consequences, and the various tribology evaluation methods that can be employed under aviation related conditions to differentiate formulation related aggravating factors.
Micropitting is a surface initiated fatigue wear process that can propagate to more severe wear that can result in bearing or gear failures. Mechanical system design has a major influence on micropitting and lubricant formulation has been shown to be a contributing factor in micropitting in other transportation sectors. The E34 committee identified the need to study micropitting and consider method(s) capable of screening formulations for micropitting propensity.
Gas turbine lubricants
Coatings, colorants, and finishes
Failure modes and effects analysis
Also known as: SAE AIR 6989
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