This hub has a 1.000" bore, 2.205" OD, and 0.591" length.
205",Aluminum,CPRS35-16-A It is compact and can fit in smaller envelopes than equivalent single beam or double insert Controlflex styles. Ruland supplied Controlflex couplings are a lightweight, low inertia, and zero-backlash coupling designed for use in encoders, tachometers, resolvers, and light duty power transmission applications. The use of one insert allows for higher misalignment capabilities than double insert styles.