Results 171 to 180 of about 413 (204)
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SCUFFING AND WEAR OF VALVE GEAR
Scientific Lubrication, 1955REPORTS FROM THE U.S.A. recently have referred quite frequently to scuffing and wear of valve gear, and it would therefore seem that this trouble has been more prevalent of late than it used to be. This may be due to increased engine loading, the use of additive-containing lubricating oils, or changes in engine design. A recent paper (to the SAE Golden
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Scuffing as a factor in the design of nylon gears
Wear, 1967Abstract In meshing gears various phenomena have been observed, all of which can lead to a breakdown of the transmission. A number of these phenomena, such as tooth rupture, wear, pitting and scuffing, also occur in nylon gears. Scuffing in gears can be ascribed to local overheating caused by friction between the flanks of engaging teeth.
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Engineered Surfaces for Improved Gear Scuffing Resistance
Volume 4: 9th International Power Transmission and Gearing Conference, Parts A and B, 2003Scuffing is a severe form of adhesive wear that can occur on gear flanks operating at combinations of high sliding speed and contact stress in marginal lubrication. Engineered Surfaces (ES) refers to the selection, application, and use of certain topographical modification (TM) techniques and thin film coatings applied using advanced physical vapor ...
Carl R. Ribaudo +6 more
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Scuffing Resistance of Advanced Gear Material/Lubricant Combinations
Journal of Lubrication Technology, 1980Two advanced carburizing grade gear steels were evaluated and compared against an AMS 6260 baseline material. Each material was evaluated on three lubricants (an unformulated ester basestock, a qualified MIL-L-23699B lubricant, and an advanced MIL-L-23699 type lubricant) to determine their gear scuffing/scoring capacities.
D. Popgoshev, R. Valori
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An experimental investigation on scuffing in spur gears
2011This paper is related to an experimental investigation of scuffing in spur gears for aerospace applications. The aim of the experimental work was to investigate the applicability of the total contact temperature criterion and to investigate scuffing failure under typical aerospace engine conditions. The experiments were carried out at the University of
CIULLI, ENRICO +4 more
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Reducing of Scuffing Phenomenon at HCR Spur Gearing
2017The article deals with possibility of increasing the resistance of HCR spur gearing from a scuffing point of view. Scuffing is the process that occurs when the surfaces of two contacting bodies are joined by localized welding and then pulled apart. A material transfer occurs between the two contacting surfaces due to high metal-to-metal contact and ...
Milan Rackov +5 more
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Testing and morphology of scuffing for modified gears
Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023), 2023Yue LIU, Junqiang XI
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Experimental and analystical scuffing criteria for FZG gears
2003Experimental gear scuffing results were obtained in the FZG test rig for wide ranges of the applied torque, tangential speed, base oil viscosity and bath oil temperature, and for FZG type A and type C gears. For restricted and particular operating conditions all scuffing criteria seem to be valid, however no one seemed appropriated for the wide ranges
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Scuffing Resistance of 16MnCr5 HCR TiAlCN-Coated Gears
2019This paper describes options of application of thin hard coatings on a non-standard involute HCR gearing made up of mat, 16MnCr5, in interaction with ecological gear oil OMV biogear S 150 and gear oil PP90H. Based on the analysis of their geometrical characteristic and it’s differences from a non-standard C-C gearing, the options of applying thin hard ...
Miroslav Bošanský +4 more
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Increasing the Resistance of Scuffing for HCR External Helical Gearing
2018The paper analyses the way to increase the resistance of HCR external involute gearing from a scuffing point of view. The scuffing is the most important damage of teeth flanks of HCR involute gears. In the case of warm scuffing; it is the combined action of high pressure between surfaces, high sliding speeds, and excessive contact temperature ...
M. Rackov +3 more
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