Determination of friction coefficient in journal bearings.pdf

Materials Design Materials and Design 28 (2007) 973–977 /locate/matdes Short communication Determination of friction coefficient in journal bearings * ¨ Bekir Sadık Unlu , Enver Atik ¨ Celal Bayar University, Engineering Faculty, Department of Mechanical Engineering, 45140 Muradiye-Manisa, Turkey Received 30 March 2005; accepted 29 September 2005 Available online 17 November 2005 Abstract Knowing friction coefficient is important for the determination of wear loss conditions at journal bearings. Tribological events that influence wear and its variations effect experimental results. In this study, friction coefficient as example at bronze radial bearings has been determined by a new approach. In experiments, friction effects of bearings have been examined at dry and lubricated conditions and at different loads and velocities. 2005 Published by Elsevier Ltd. 1. Introduction called the static friction coefficient, and the latter, the kinetic friction coefficient. In the case of solid-on-solid fric- The force known as friction may be defined