Correlation of indices of extreme-pressure properties of oils when evaluated in four-ball friction tester and in IAE gear machine

Zaskal'ko, P. P.; Nekrasov, V. I.; Терехов, А. С.

doi:10.1007/bf00724207

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Lubricant Ep Properties With Four-ball Tribometer1

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2017

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“…The new oils are illustrated in blue, used oils in red with a dashed line. The figures also include ''Hertz lines'' that show the how the calculated hertz diameter varies with the applied load, plotted in a logarithmic scale; 33 these are included as brown, dotted lines.…”

Section: Lubricant Ep Properties With Four-ball Tribometermentioning

confidence: 99%

Performance of lubricating oils for wind turbine gear boxes and bearings

Burkhart

Johansson

Uukonsari

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part J:

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In this study, the friction and wear properties of six different new and used wind turbine gear oils (ISO VG 320), with different base oil formulations and additives packages, were investigated. For that purpose, a four-ball tribometer and an Optimol SRV were used. Moreover, the lubricants extreme pressure properties were also evaluated, using the same four-ball tribometer. The study also includes a characterization of the lubricants. The main objective was to compare the new and used gear oils in order to identify performance differences and predict oil change intervals. The results indicate that a use of 3 to 4 years is within the lifetime of the lubricant.

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Section: Lubricant Ep Properties With Four-ball Tribometermentioning

confidence: 99%