STUDY OF HELICOPTER GEAR LUBRICATION

The report contains results of investigations along two lines: (1) studies of the effects of pretreatments on the fatigue life of gears, and (2) exploratory tests to determine the effects of extreme pressure (EP) additives on the mechanisms of surface damage, particularly fatigue pitting, in sliding...

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Bibliographic Details
Main Authors: BAILEY,D R, Beaubien,S J
Format: Report
Language:English
Subjects:
ADDITIVES
GEARS
HARDNESS
Helicopters
LIFE SPAN(BIOLOGY)
LUBRICANTS
Lubricants and Hydraulic Fluids
LUBRICATION
POLISHING
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Summary:The report contains results of investigations along two lines: (1) studies of the effects of pretreatments on the fatigue life of gears, and (2) exploratory tests to determine the effects of extreme pressure (EP) additives on the mechanisms of surface damage, particularly fatigue pitting, in sliding and rolling contacts. The pretreatments include the application of precoatings, polishing to reduce surface roughness, and tempering hardened gears to give a range of hardnesses. All gear tests were conducted at a pinion speed of 1600 rpm. See also AD-621 916.