Concerning leaded bronzes, the crucial role of third bodies in dry sliding has been previously observed with similar tribologi-cal conditions as in this study [9]. At low load, only small metal oxide particles were generated. Under higher contact pressure, lead-enriched larger flat debris were built up, decreasing the wear coefficient and the friction. Microstructure played an important role in the formation of the antifriction flat debris. Fewer but larger lead inclusions allowed building up the beneficial flakes under lower contact pressure.