Micro-slip motion occurs in the metal contact surfaces around the hub bearings of the driven wheels when automotive driving torque is applied. A stick-slip noise can accompany this slip motion. Analysis of the occurrence of stick-slip has shown that it is caused by a combination of factors. The research described in this paper has discovered previously unknown causes. Excess insertion load or axial force causes non-uniform strain in the bearing inner race; this strain builds up even after the load is released. Changes occur in the lubrication conditions of the press-fit face of the hub and the bearing inner race with varying insertion speed and humidity conditions, leading to the generation of excess insertion load. An effective method for prevention of stick-slip is proposed on the basis of this analysis.
Article of Honda R&D Technical Review Vol.15 No.1 (173 - 180)