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Title
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Fundamentals of Rolling-Element Bearing Lubrication
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Description
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The basic processes of lubrication at the rolling-contact regions between the elements and races in bearings are discussed. Lubricant film-thickness and contact-deformation data with various lubricants in a precision rolling-disk machine, using a special X-ray method, are presented. These data show that lubricant films significantly thicker than molecular dimensions exist at bearing contacts under many practical conditions, and that significant deviations from Hertzian stresses can occur by the action of lubricant pressures, particularly at the edges of the bearing contact regions. Here the lubricant must withstand high shear stresses under rapidly changing pressures to effectively separate bearing surfaces. Even if appreciable breakdown of the lubricant film occurs in the near-contact region, the high-pressure shear behavior of the lubricant at the edges of the contact may still affect bearing contact stresses significantly.
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Creator
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Sibley, L. B.
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Orcutt, F. K.
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Allen, C. M.
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Format
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1 online resource (15 pages) : ill.
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Type
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article
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Abstract
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The basic processes of lubrication at the rolling-contact regions between the elements and races in bearings are discussed. Lubricant film-thickness and contact-deformation data with various lubricants in a precision rolling-disk machine, using a special X-ray method, are presented. These data show that lubricant films significantly thicker than molecular dimensions exist at bearing contacts under many practical conditions, and that significant deviations from Hertzian stresses can occur by the action of lubricant pressures, particularly at the edges of the bearing contact regions. Here the lubricant must withstand high shear stresses under rapidly changing pressures to effectively separate bearing surfaces. Even if appreciable breakdown of the lubricant film occurs in the near-contact region, the high-pressure shear behavior of the lubricant at the edges of the contact may still affect bearing contact stresses significantly.
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Extent
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15
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Corporate Author
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Battelle Memorial Institute
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Report Number
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ASD-TDR-62-465 p. 77-91
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Report Availability
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Full text available
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Date
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1962
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Date Issued
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1962-05
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Contract
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AF 33(616)-7223
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DoD Project
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3044
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DoD Task
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30169
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30340
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Distribution Classification
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1
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Distribution Conflict
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No
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Index Abstract
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Contrails only
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Relation
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This paper was published in the Proceedings Of The Air Force-Navy-Industry Propulsion Systems Lubricants Conference held in San Antonio, Texas on 15, 16, and 17 November 1960
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Identifier
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AD0278843