This hub has a 24mm bore, 8mm keyway, 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.