The cage gin is relatively new cotton ginning technology and still is not available commercially. It has the advantage that the quality of the lint obtained with it is better than that obtained with the saw or roller gin. However, it has the disadvantage that its lint turnout is lower than that of the saw or roller gin. A model to predict the optimum operating parameters of the cage gin was developed. The model was useful to gain understanding of the cage ginning process, and to get recommendations to improve the operation and lint turnout of the cage gin. Two physical properties of the cotton fibers, fiber attachment force and fiber friction, were used in the model.