Forty-millimeter-bore ball bearings with lead and lead-alloy-coated retainers were operated in liquid hydrogen at 30000 rpm under a thrust load of 1780 Newtons (400 lb). Bearing lives were compared using different (1) lead- and lead-alloy coatings, (2) coating thicknesses, (3) substrate materials, (4) retainer locating surfaces, and (5) plating techniques. Longer bearing run times were achieved using retainers with a lead-tin-copper alloy coating electroplated onto a leaded-bronze material (22.5 hr) and an aluminum-bronze alloy (19.3 hr). Thirty percent of the bearings tested achieved the desired objective of 10 hours. All of the lead-alloy coated retainers exceeded this objective. A coating thickness of at least 36 microns (0.0014 in.) was used for all bearings exceeding the 10-hour goal.
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July 1974
This article was originally published in
Journal of Lubrication Technology
Research Papers
Performance of High-Speed Ball Bearings With Lead and Lead-Alloy-Plated Retainers in Liquid Hydrogen at 1.2 Million DN
D. E. Brewe,
D. E. Brewe
Lewis Research Center, Cleveland, Ohio
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H. W. Scibbe,
H. W. Scibbe
Lewis Research Center, Cleveland, Ohio
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D. W. Wisander
D. W. Wisander
Lewis Research Center, Cleveland, Ohio
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D. E. Brewe
Lewis Research Center, Cleveland, Ohio
H. W. Scibbe
Lewis Research Center, Cleveland, Ohio
D. W. Wisander
Lewis Research Center, Cleveland, Ohio
J. of Lubrication Tech. Jul 1974, 96(3): 437-442 (6 pages)
Published Online: July 1, 1974
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Received:
July 9, 1973
Online:
October 18, 2010
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Brewe, D. E., Scibbe, H. W., and Wisander, D. W. (July 1, 1974). "Performance of High-Speed Ball Bearings With Lead and Lead-Alloy-Plated Retainers in Liquid Hydrogen at 1.2 Million DN." ASME. J. of Lubrication Tech. July 1974; 96(3): 437–442. https://doi.org/10.1115/1.3451996
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