Crane couplings are mechanical devices used to connect and transmit power between different components of a crane. They are designed to join two shafts or parts together, allowing the transfer of torque and rotational motion. Crane couplings ensure a reliable and efficient power transmission while accommodating misalignments or vibrations that may occur during crane operation. They provide flexibility, reduce stress on the connected components, and help protect the crane from damage. Crane couplings play a vital role in maintaining the integrity and smooth operation of cranes by facilitating the transfer of power and motion between various crane parts.