RT Journal Article SR Electronic A1 Piórkowski, Paweł A1 Roszkowski, Andrzej A1 Szabla, Zofia T1 Diagnostics of Milling Head Using Acoustic Emission JF Manufacturing Technology Journal YR 2025 VO 25 IS 2 SP 222 OP 229 DO 10.21062/mft.2025.023 UL https://journalmt.com/artkey/mft-202502-0008.php AB Monitoring and diagnostics of cutting tools are crucial for ensuring production efficiency and product quality in the machining industry. This study uses acoustic emission (AE) to non-invasively detect damage and monitor tool condition in real time. Experiments assessed cutting inserts in a milling head, both used and new. Results showed AE effectively diagnoses tool wear, with significant differences in signals from worn and new inserts. Fast Fourier Transform (FFT) analysis determined the frequency range of signals during machining, confirming AE's usefulness. Microscope verification supported the AE findings on tool wear. This research highlights AE's potential in non-destructive diagnostics, enhancing production efficiency and product quality