
Couplings are essential mechanical components designed to connect rotating shafts and transmit torque and rotational power across mechanical drive systems, with standardized specifications defining their operational performance and application adaptability. Core specifications cover torque transmission capacity, rotational speed tolerance, and misalignment compensation capability, including angular, parallel and axial shaft displacement that commonly occurs during equipment operation and thermal expansion. Different structural designs endow couplings with distinct traits: rigid couplings feature high structural rigidity and precise power transmission for perfectly aligned shaft systems, while flexible couplings adopt elastic or movable structures to buffer vibration, absorb impact loads, and reduce mechanical wear. Additional key specifications include structural durability, operating temperature adaptability, and installation compatibility, which collectively determine the stability, service life and operational efficiency of industrial transmission equipment under diverse working conditions.