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© 2017 Elsevier BV. This is the post print version of the following article: Saikko, Vesa. 2017. High frequency circular translation pin-on-disc wear testing of UHMWPE using a ball-on-flat contact along a hypotrochoidal track. Polymer Testing. Volume 60. 149-152. ISSN 0142-9418 (printed). DOI: 10.1016/j.polymertesting.2017.03.024, which has been published in final form at http://www.sciencedirect.com/science/article/pii/S0142941817301824. This post-print is published with permission from Elsevier under CC BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/).