FCL Flexible couplings , 1) Compact designing, easy installation . 2) Convenient maintenance, small size and light weight . 3)Widely used in medium and minor power transmission systems driven by moters , such as speed reducers ,hoists ,compressors , conveyers , spinning and weaving machines and ball mills . Permittable relative displacement : 1) Radial displacement :0.2 0.6mm 2) Angle displacement :0°30 1°30