1. Department of Machine Design and Machining, Kielce University of Technology, al. Tysiaclecia Panstwa Polskiego 7, 25-314 Kielce, Poland
2. Faculty of Mechanical Engineering, Poznan University of Technology, Piotrowo 3, 60-965 Poznan, Poland
3. Pratt & Whitney Kalisz, Elektryczna 4a, 62-800 Kalisz, Poland