Beam Couplings – Whether single or multi beam , are very high speed but very low torque capable coupling, with the ability to flex to only 5 degrees makes them very limited in what they can be used for.

Their torsional stiffness (the coupling is a piece of metal with cuts made to allow it to flex) is quite high but this stiffness comes at the price of no flexibility, any machine wear because of changes of weight or angle of use means they wear quickly