A jaw coupling is a kind of general purpose power transmission coupling that also can be used in motion control (servo) applications. It really is made to transmit torque (by linking two shafts) while damping program vibrations and accommodating misalignment, which protects other components from damage.
Jaw Couplings are one of the first and even now hottest elastomer couplings in the globe because of their inherent simplicity. Two similar hubs with 3 encounter lugs are connected through a celebrity shaped element, sometimes known as an insert or spider. The 3 piece design makes them 
simple to work with and well-known on applications such as for example pumps, supporters, blowers and compressors.
Jaw Couplings require no lubrication and offer high dependability for light to medium duty applications with great alignment of equipment and no requirement for torsional dampening.
In regular operating conditions there is absolutely no metal to metallic contact therefore the life of the hubs is virtually indefinite. However, in a catastrophic failure of the component the load would be carried by the hubs offering a degree of failure safety. Jaw couplings are resistant to essential oil, dirt, wetness and grease.
Specific element materials are available to achieve maximum performance for the working conditions.
The standard element materials is NBR (N)-‘Synthetic Rubber’. It really is highly flexible, essential oil resistant and the torsionally softest of the component options. It includes a temperatures operating range ideal for most industrial applications and permits up to at least one 1 degree misalignment capability of the connected shafts. NBR may be the most economically priced option.