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TECHNICAL PAPERS

Increased Wear Resistance of Roller Bearings Using Me-C: H Coated Rollers

[+] Author and Article Information
Ulf Olofsson

Department of Machine Design, S-100 44 Stockholm, Sweden

Hans Sjöström

Sjöström Coating Consulting, Karlgustavsgatan 21 A, S-411 25 Göteborg, Sweden

Ulf Sjödin

Hägglunds Drives AB, S-890 42 Mellansel, Sweden

J. Tribol 122(4), 682-688 (May 08, 2000) (7 pages) doi:10.1115/1.1310559 History: Received August 03, 1999; Revised May 08, 2000
Copyright © 2000 by ASME
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References

Figures

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Schematic of the test rig. Courtesy of Hägglunds Drives AB
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Left—photograph of failed shaft washer from standard bearing (standard rollers) test 2. Right—photograph of non-failed shaft washer from Me-C: H bearing (coated rollers) test 2. The dark bands in the photographs are the zero sliding points.
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Residual terms for Me-C: H bearing, test 1. The rolling direction is parallel with the y-axis.
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Residual terms for standard bearing, test 1. The rolling direction is parallel with the y-axis.
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Housing washer wear test 2. The inner washer diameter is located at 0 in the length axis. Test ended after 250,000 revolutions.
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Housing washer wear test 1. The inner washer diameter is located at 0 in the length axis. Test ended after 800,000 resolutions.
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Housing washer wear test 3. The inner washer diameter is located at 0 in the length axis. Test ended after 58,000 revolutions.
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Housing washer wear test 4. The inner washer diameter is located at 0 in the length axis. Test ended after 58,000 revolutions.
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Number of particles greater than 5 μm and 15 μm versus number of revolution for test 3. 4 mg/l ISO MTD added to the lubricating oil. After each period of 24 h running time the bearing was unloaded and the oil was filtered for one hour through a 3 μm filter. After the filtering period load was applied to the bearing and new particles were injected into the oil.
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Number of particles greater than 5 μm and 15 μm versus number of revolution for test 4. No particles added to the lubricating oil. After each period of 24 h running time the bearing was unloaded and the oil was filtered for one hour through a 3 μm filter.  
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Carbon content versus depth from GD-OES analysis of housing washer surfaces test 2
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Tungsten content versus depth from GD-OES analysis of housing washer surfaces test 2

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