A jaw coupling is a type of general purpose power transmission coupling that also can be used in motion control (servo) applications. It is designed to transmit torque (by connecting two shafts) while damping system vibrations and accommodating misalignment, which protects other components from damage.

Jaw couplings are commonly employed on large, industrial machines such as pumps, blowers, compressors, mixers, etc. They are also used in smaller motion control systems, although special considerations are necessary.