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Couplings are mechanical components that connect two rotating shafts together in a power transmission system, allowing them to transmit torque and rotation from one shaft to another. Couplings can also be used to compensate for misalignment between shafts and to absorb shock and vibration.

In power transmission systems, couplings are essential for transmitting power between different components such as motors, gearboxes, and pumps. There are several types of couplings used in power transmission, including:

Flexible couplings are designed to compensate for misalignment between two shafts, which can be caused by thermal expansion, manufacturing tolerances, or other factors.

Rigid couplings are used when shaft alignment is critical and there is no misalignment to compensate for. These couplings are used in applications such as precision machine tools.

Gear couplings are used for high-torque applications and can accommodate some misalignment between shafts. They consist of two hubs with external teeth that mesh together.

Chain couplings are used for heavy-duty applications that require high torque transmission. They consist of two sprockets connected by a roller chain.

Universal joints are used when there is a significant angle between two shafts that need to be connected. They are commonly used in automotive applications.

Couplings are a crucial component in power transmission systems as they allow for the efficient and reliable transfer of power between rotating shafts, while also accommodating for any misalignment or shock and vibration that may occur.

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