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The correlation between gear contact friction and ball on disc friction measurements

Research output: Contribution to journalArticleScientificpeer-review


Original languageEnglish
Pages (from-to)114-119
Number of pages6
JournalTribology International
Publication statusPublished - 2015
Publication typeA1 Journal article-refereed


Running experiments with full-size gearboxes from the actual application has the advantage of giving realistic results in terms of power losses. The drawback is extensive costs, lengthy testing, and the difficulty in differentiating between load dependent and load independent losses, and which losses are coming from the gears, seals, bearings or synchronizers. In this work, the correlation between friction measurements conducted in a ball-on-disc machine and friction measurements conducted in a back-to-back gear rig is investigated. The correlation between the gear tests and the ball-on-disc tests was reasonably good in terms of absolute values, and the shape of the friction curves was similar, indicating that the ball-on-disc measurements to a large extent are capturing the behavior of the gear contact.


  • Ball-on-disc, EHL, Friction, Gears

Publication forum classification

Field of science, Statistics Finland