DESIGN EFFECTS ON THE FRETTING WEAR BEHAVIOR OF BALL-BEARINGS

A change in design of a ball bearing is described based on the results of numerical and experimental analysis to reduce fretting wear, Incre asing the radii of curvature of the inner and outer races by a small a mount reduces the product of the relative slip delta and the tangentia l traction tau at the contact region, both of which are caused by Heat hcote slip, This results in the consequent reduction in fret ting wear because there Is a good correlation between the amount of fretting we ar and tau delta. This prediction is confirmed experimentally by incre asing the groove radius of the inner race from 4.02 to 4.21 mm for a b all of radius 3.97 mm. (C) 1998 Elsevier Science Ltd. All rights reser ved.