This hub has a 12mm bore, 56.0mm OD, and 15.0mm length.
The multiple piece construction allows for a highly customizable coupling that easily combines clamp hubs with inch, metric, keyed, and keyless bores. 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. This clamp style single insert type hub requires the user to mate it with one other hub and one acetal insert.