Flexible Couplings

thingiverse

Combine various 8 mm and 5 mm diameter couplings; 5 mm options feature round bore or D-shaped profiles. Incorporate a spacer, such as washers, nuts, or standoffs, to boost flexibility. A provided spacer has an OD of 36 mm and is 2 mm thick, adjustable in Z. Bolt circle diameter is 24 mm for compatibility with your designs; M3 screws are utilized. Note that 5 mm couplings without the D-shape have low torque capacity. An updated coupling, clamp-style 3/8" diameter, is now available (Coupling_Clamp_0375in_Half.stl). For optimal printing, set threaded parts at 0.1 mm and non-threaded at 0.15 to 0.2 mm, with 100% fill. Apply PTFE tape on all threaded parts. Thinner flanges (reduced by 0.4 mm) can be used for increased flexibility, while omitting the spacer between flanges increases rigidity. The nut arrow indicates coupling direction due to taper threads. Detailed instructions will be added later.