Power transmission mechanism components are mechanical element parts designed to efficiently transmit rotational force and linear motion generated from prime movers such as motors and engines to various parts of mechanical equipment. These include gears, belts, chains, couplings, clutches, brakes, pulleys, sprockets, bearings, and shafts. They play a central role in all industrial machinery, including drive systems for manufacturing lines, feed mechanisms for machine tools, and power transmission units for conveying equipment. These components provide functions such as torque conversion, speed adjustment, direction change, and intermittent control, serving as critical elements that determine the performance and reliability of the entire mechanical system.