{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,8]],"date-time":"2025-11-08T22:36:50Z","timestamp":1762641410619,"version":"3.38.0"},"reference-count":20,"publisher":"SAGE Publications","issue":"7","license":[{"start":{"date-parts":[[2011,5,11]],"date-time":"2011-05-11T00:00:00Z","timestamp":1305072000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology"],"published-print":{"date-parts":[[2011,7]]},"abstract":"<jats:p> Thrust ball bearings lubricated with several different types of grease, including three biodegradable low-toxicity greases, were tested in a modified four-ball machine in order to evaluate the bearing friction torque. At the end of each test, grease samples were obtained and analysed through ferrography, allowing the quantification and evaluation of the bearing wear. In order to compare the grease performance in terms of friction and wear, a correlation between the grease characteristics (base oil, bleed oil, thickener structure, and rheological parameters) and the experimental results was established. <\/jats:p>","DOI":"10.1177\/1350650110397261","type":"journal-article","created":{"date-parts":[[2011,5,12]],"date-time":"2011-05-12T03:59:40Z","timestamp":1305172780000},"page":"627-639","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":22,"title":["Friction and wear in thrust ball bearings lubricated with biodegradable greases"],"prefix":"10.1177","volume":"225","author":[{"given":"T","family":"Cousseau","sequence":"first","affiliation":[{"name":"Instituto de Engenharia Mec\u00e2nica e Gest\u00e3o Industrial \u2013 INEGI, Porto, Portugal"}]},{"given":"B","family":"Gra\u00e7a","sequence":"additional","affiliation":[{"name":"Instituto de Engenharia Mec\u00e2nica e Gest\u00e3o Industrial \u2013 INEGI, Porto, Portugal"}]},{"given":"A","family":"Campos","sequence":"additional","affiliation":[{"name":"Instituto Superior de Engenharia do Instituto Polit\u00e9cnico do Porto \u2013 ISEP\u2013IPP, Porto, Portugal"}]},{"given":"J","family":"Seabra","sequence":"additional","affiliation":[{"name":"Faculdade de Engenharia da Universidade do Porto \u2013 FEUP, Porto, Portugal"}]}],"member":"179","published-online":{"date-parts":[[2011,5,11]]},"reference":[{"key":"bibr1-1350650110397261","doi-asserted-by":"publisher","DOI":"10.1021\/ie050826f"},{"key":"bibr2-1350650110397261","unstructured":"SKF. 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