A jaw coupling is a type of general purpose power transmission coupling that also can be used in movement control (servo) applications. It really is designed to transmit torque (by linking two shafts) while damping program vibrations and accommodating misalignment, which protects other components from damage.
Jaw Couplings are among the first and even now hottest elastomer couplings in the world due to their inherent simplicity. Two similar hubs with 3 face lugs are connected through a superstar shaped element, sometimes referred to as an put in or spider. The 3 piece design makes them easy to work with and popular on applications such as for example pumps, supporters, blowers and compressors.
Jaw Couplings require no lubrication and offer high dependability for light to moderate duty applications with good alignment of equipment no requirement of torsional dampening.
In normal operating conditions there is absolutely no metal to metallic contact therefore the life of the hubs is virtually indefinite. Nevertheless, in a catastrophic failure of the component the load would still be carried by the hubs providing a degree of failure protection. Jaw couplings are resistant to essential oil, dirt, wetness and grease.
Specific element materials are available to achieve optimum performance for the working conditions.
The standard element materials is NBR (N)-‘Synthetic Rubber’. It is highly flexible, oil resistant and the torsionally softest of the element options. It includes a temp operating range ideal for most industrial applications and allows 
for up to 1 1 degree misalignment capability of the linked shafts. NBR is the most economically priced option.