This paper studies the dynamic behaviors for face-gear drives meshing with multiple spur pinions by using the model of a spinning disk with time-varying mesh loads that result from the unique face-gear meshing kinematics and nonunity contact-ratio. The system stability is assessed with respect to intersecting pinion shaft angles and pinion gear properties. The results provide information about parametric instability for dynamic-based design of multipinion/face-gear drives. This investigation also provides stabilization methods for pre-installed systems via gear radii and tooth numbers for a given intersecting pinion shaft angle.

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