Rotating shaft couplings

mechanism with bendable rotation axis

mechanical joint to transmit power through a variable angle, at constant rotational speed

thumb|An improvised flexible coupling made of car tyre pieces connects the drive shafts of an engine and a water pump. This one is used to cancel out Run-out|misalignment and dampen vibrations. frame|Rotating coupling A coupling is a device used to connect two shafts together at their ends for the purpose of transmitting power. The primary purpose of couplings is to join two pieces of rotating equipment while permitting some degree of misalignment or end movement or both. In a more general context, a coupling can also be a mechanical device that serves to connect the ends of adjacent parts or

a hydrodynamic or 'hydrokinetic' device used to transmit rotating mechanical power

mechanism to control angle of attack of helicopter rotor blades

thumb|A driveshaft coupling. Note the split damage beginning to appear, likely due to the large axial displacement. thumb|A giubo

mechanical connection of two half-shafts by tapered teeth that mesh together

general purpose coupling for transmitting torque by connecting two shafts while damping vibrations and accommodating misalignment