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Coupling and cohesion are key concepts in software design that measure relationships between modules. Coupling refers to the degree of interdependence between modules, where low coupling is desirable for flexibility. Cohesion assesses how closely related the responsibilities within a single module are, with high cohesion being ideal for maintainability.

A gear coupling is a mechanical device used to connect shafts, transmitting torque while accommodating misalignment through the meshing of internal and external gears. It allows for angular, parallel, and axial displacement, providing high torque capacity and reliability in industrial applications.

A fluid coupling is a hydrodynamic device that transmits rotational power from an engine to machinery without using a mechanical connection. It uses a liquid, typically oil, to transfer torque between an input impeller and an output turbine, providing smooth, gradual acceleration and overload protection.

JAW couplings are a type of flexible coupling known for their high torque capacity and ability to accommodate misalignment. This brief introduction highlights their key distinctions from other common coupling types, such as gear, grid, and elastomeric couplings, focusing on design, performance, and typical applications.

Introduction to calculating the service factor for chain couplings.

A rigid coupling is a mechanical device used to connect two shafts together, transmitting torque while maintaining precise alignment and preventing relative movement between them.