Parameters influencing the running-in and long-term tribological behaviour of polyamide (PA) against polyacetal (POM) and steel

► Investigation of tribological properties of PA against POM and steel. ► Effects influencing the length of the running-in are discussed. ► Discussion about the effect of surface roughness on the wear mechanisms. ► Effects of contact-pair material combination are discussed. ► Length of test duration is proposed for plastic/plastic contacts.