This hub has a 0.875" bore, 2.205" OD, and 0.472" length.
CntrlFlx Cplng Hub, Dbl,Bore 0. 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 multiple piece construction allows for a highly customizable coupling that easily combines clamp hubs with inch, metric, keyed, and keyless bores.