In a previous paper [1], the theoretical prediction of a ball bearing motion was studied and different routes to chaos described. The aim of this paper is to study experimentally routes to chaos in a ball bearing and to observe whether theoretical predictions of the phenomena are realistic. An experimental test bench was built and a technique to observe Poincare´ maps is proposed. The experience clearly shows the appearance of instability in the bearing motion, and two different routes to chaos are described as expected in theory. The first route is related to the first resonant frequency of the bearing. It is a sub-harmonic route. The second route, related to the second resonant frequency, is a quasi-periodic route.

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