Effect of Press Fitting Between Bush and Inner Plate Upon the Fatigue Strength of Roller Chain

Abstract

In this paper, the fatigue strength of the roller chain is investigated by varying the press-fitting ratio between the bush and the inner plate. A single plate specimen with two bushes press-fitted into two holes at the plate ends is used in the fatigue test. The FEM analysis is performed to obtain the stress amplitude and the average stress on the fatigue endurance limit diagram. The results show that the fatigue strength can be improved under suitable press-fitting ratio δ/D <1.8×10-3 compared to the fatigue strength at the press-fitting ratio δ/D=0.