The Effects of Number of Balls and Preload on Vibrations Associated With Ball Bearings

[+] Author and Article Information
N. Aktürk

Gazi University, Department of Mechanical Engineering, Maltepe, Ankara, Turkey

M. Uneeb

Water and Power Development Authority, WAPDA House, Lohore, Pakistan

R. Gohar

Imperial College of Science, Technology and Medicine, Department of Mechanical Engineering, Tribology Section, Exhibition Road, South Kensington, London, United Kingdom

J. Tribol 119(4), 747-753 (Oct 01, 1997) (7 pages) doi:10.1115/1.2833880 History: Received January 29, 1996; Revised July 01, 1996; Online January 24, 2008


In this paper, the radial and axial vibrations of a rigid shaft supported by a pair of angular contact ball bearings are studied. The effect on the shaft vibration of varying the preload and the number of balls in the bearings is investigated when the bearings are perfect. For perfect bearings the vibrations occur at the ball passage frequency. The amplitudes of these vibrations are shown to be considerably reduced if the preload and number of balls are correctly selected. All results show that the vibration characteristics of the shaft and its bearings change when the bearings operate in different regions of their nonlinear load-deflection characteristics. This implies that the preload and the number of balls in a ball bearing are two of the important governing parameters affecting its dynamic behavior and have to be considered at the design stage.

Copyright © 1997 by The American Society of Mechanical Engineers
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