FCL flexible coupling is widely used for its compact design, easy installation, convenient maintenance, samll size and light weight. As long as the relative displacement between shafts is kept within the specified tolerance, coupling will perate the best function and have a longer working life. Thus,it is greatly demanded in medium and minor power transmission systems driven by moters, such as speed reducers, hoists, compressors. comveyers. spinning and weaving machines and ball mills.