Dynapar offers a wide range of shafted rotary encoders that mount to a motor or driven shaft via a flexible coupling. By changing the coupling, shafted encoders can be matched with a variety of motors, even non-standard or older motors. The coupling can also provide electrical isolation from the motor and absorb shaft movement or compensate for shaft misalignments making shaft encoders ideal for strenuous applications. The shaft coupling is usually covered with a bracket or "flower-pot" mounting fixture to provide support and protect the coupling.
Learn more about encoder mounting styles here