... in in dynamic application synchronously. 1.Feature of DR series Flexible Coupling* One-piece metallic spring coupling, 4 ... ally. * D: External diameter of the connector; L: The long of the connector. * D and L can be defined by ... connector15,18,20,22,25mmL: the long of the connector.20,25,30,35mmM: The hole dia. of the ... Setsscrew Type Flexible Coupling, Encoder Coupling , DR series Coupling ( IBEST)