13 mm OD Reli-A-Flex Clamp Type Shaft Coupling. This is a flexible beam type coupling that is secured to the shaft via clamping action. The clamp is adjusted by tightening the M1.6 socket head cap screws along the edge of the coupling.
Product catalog can be found here.
Product page can be found here.
These couplings are used to connect two shafts together in order to transmit motion. These differ from power transmission couplings because they are designed for motion control applications where very smooth motion and torsional stiffness is required. Many hours of testing and analysis have produced a design that provides the best balance between low bearing load, zero backlash, and torsional stiffness. This product handles axial offset, angular, and parallel better than most competing products. We have the world's smallest standard production coupling in our product range.