Flexible coupling - Gear coupling

A gear coupling is a mechanical device for transmitting torque between two shafts that are not collinear. It consists of a flexible joint fixed to each shaft. The two joints are connected by a third shaft, called the spindle. Each joint consists of a 1:1 gear ratio internal/external gear pair

Despite the fact that one may not consider gears being flexible, gear couplings are particularly viewed as a flexible coupling. A gear coupling is a mechanical device intended to transmit torque between two shafts that are not collinear. The coupling commonly comprises two flexible joints, one fixed to each shaft

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