... 35mm, 8mm, 10mm. * M: The hole dia. Of the encoder end. N: The hole dia. Of the user end. * ... the corner setover<1.5 degree * Adapt to the encoder and user with the spring connect.2. Technical SpecificationProperty ... 20,25,30,35mmM: The hole dia. of the encoder endΦ4,Φ5,Φ6,Φ8,Φ10,Φ12,Φ15mmN: the ... !IBEST ELECTRICAL CO.LTD Setsscrew Type Flexible Coupling, Encoder Coupling , DR series Coupling ( IBEST)