This hub has a 32mm bore, 56.0mm OD, and 12.0mm length.
This Controlflex hub is RoHS and REACH compliant and manufactured by Schmidt Kupplung in Germany. 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. Controlflex Coupling Hub, Single, Bore 32mm, OD 56.