... function in in dynamic application synchronously. 1.Feature of DR series Flexible Coupling* One-piece metallic spring coupling, 4 screws ... . of the encoder endΦ4,Φ5,Φ6,Φ8,Φ10,Φ12,Φ15mmN: the hole dia.of the user end.Φ4,Φ ... 5,Φ6,Φ6.35,Φ7,Φ8,Φ10,Φ12,Φ15mmTorqueseries Coupling ( IBEST)