A jaw coupling is a kind of general purpose power transmission coupling that also can be utilized in movement control (servo) applications. It really is made to transmit torque (by connecting 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 due to their inherent simplicity. Two identical hubs with 3 face lugs are connected through a celebrity shaped element, sometimes referred to as an put in or spider. The 3 piece design makes them easy to work with and well-known on applications such as for example pumps, fans, blowers and compressors.
Jaw Couplings require no lubrication and provide high reliability for light to moderate duty applications with good alignment of equipment no requirement for torsional dampening.
In normal operating conditions there is absolutely no metal to metal contact so the life of the hubs is virtually indefinite. However, in a catastrophic failing of the element the load would be carried by the hubs offering a degree of failure protection. Jaw couplings are resistant to essential oil, dirt, dampness and grease.
Specific element materials are available to achieve optimum performance for the functioning conditions.
The standard element material is NBR (N)-‘Synthetic Rubber’. It really is highly flexible, essential oil resistant and the torsionally softest of the element options. It has a temp operating range suitable for most industrial applications and allows for up to at least one 1 degree misalignment capacity of the connected shafts. NBR is the most economically priced option.