Pin on disc tester

Hopkins and Campbell also carried out similar tests with a pin-on-disc tester in which the stress in the contact zone was calculated as 117 MPa, reducing to 1.3 MPa. The results of these tests were completely different, showing a linear increase in wear life with increasing initial film thickness over the whole range studied, as shown in Figure 7.10. 

Pin on disc tester Wear and friction coefficient test... 

Wear testing of vitamin-E-diffused, 100-kGy irradiated UHMWPE on a custom-designed pin-on-disc tester in bovine serum in our laboratory showed that the wear rate was comparable to 100-kGy irradiated and melted UHMWPE [1]. In this study, accelerated aging at 80°C for 5 weeks did not change the wear rate of this UHMWPE despite the fact that vitamin E was diffused only 0.5 mm into the surface of this sample and not throughout the entire thickness. This suggested that the wear region was within this surface layer protected by the vitamin E. 

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