Researchers demonstrate direction dependent vibrational strong coupling at the nanoscale CIC nanoGUNE Roles and Types of Shaft Couplings VibrationCollision Coupling Modeling in Grape Clusters for Non Damage Harvesting Operations COUPLING TYPES 4 1 Definition Couplings are mechanical components used to connect two rotating shafts for transmitting power and torque. They are designed to compensate for misalignment, absorb vibration, and reduce shock Rotational vibrational coupling