When do I need a bellows coupling and when do I need an elastomer coupling?
When position accuracy is critical in a rotary coupling application, the high torsional stiffness of a bellows coupling is likely to be required. Additionally bellows couplings flex very easily, minimizing bearing loading, and allowing for smooth operation of the mechanical system. Bellows couplings also have a very low mass moment of inertia, allowing for rapid acceleration. They are the ideal servo coupling when their size and cost are acceptable.
