Star Coupling

The Star coupling, also known as a jaw coupling or spider coupling, is a type of flexible coupling used to connect two shafts together while allowing for a small degree of misalignment. It is commonly used in various industrial applications to transmit torque between shafts that are not perfectly aligned.

The coupling consists of two hubs (also called flanges) with external teeth that fit onto the ends of the shafts to be connected. The hubs are usually made of metal, and they are connected by an elastomeric element known as the spider or insert. The spider is made of a flexible material, such as rubber, polyurethane, or other elastomers, and has curved jaws that fit into the teeth of the hubs.

When the two hubs are pressed together, the spider compresses and flexes, allowing the coupling to accommodate small amounts of axial, angular, and parallel misalignment between the shafts. This flexibility helps reduce stress and wear on the connected equipment and provides some vibration damping.

Star couplings are popular because they are easy to install, require minimal maintenance, and provide a cost-effective solution for many coupling applications. They are commonly found in various industrial machinery, pumps, compressors, generators, and other power transmission systems.

It’s important to note that there are various sizes and designs of Star couplings, each suited for different torque and misalignment requirements. When selecting a coupling, it is essential to consider factors such as the torque capacity, speed, misalignment limits, and environmental conditions to ensure proper functionality and longevity.