RT Journal Article SR Electronic A1 Aleš, Zdeněk A1 Pavlů, Jindřich A1 Hromasová, Monika A1 Svobodová, Jaroslava T1 Tribological Properties of Brass Surfaces Machined by Abrasive - Free Ultrasonic Finishing Process JF Manufacturing Technology Journal YR 2019 VO 19 IS 1 SP 3 OP 8 DO 10.21062/ujep/235.2019/a/1213-2489/MT/19/1/3 UL https://journalmt.com/artkey/mft-201901-0001.php AB Brass mechanical properties are not ideal, particularly when the brass is exposed to the effects of mechanical wear. Final finishing of functional surface of machine component is substantial for the particular choice of brass. The aim of the research was to approve or disapprove the hypothesis if abrasive - free ultrasonic finishing (bufo) of brass has higher wear resistance of surface compared to the classical machining. The results of the experiment showed that abrasive - free ultrasonic finishing (bufo) has a major impact on the size of the elliptical wear area. Surface finishing by classic machining formed on average a 41% larger elliptical wear area compared to surface with abrasive - free ultrasonic finishing. The hypothesis of experiment were verified and it is possible to consider that abrasive - free ultrasonic finishing (bufo) has considerable influence on wear resistance of the surface of machine parts.