A jaw coupling is a type of general purpose power transmission coupling that also can be utilized in motion control (servo) applications. It really is designed to transmit torque (by connecting two shafts) while damping system vibrations and accommodating misalignment, which protects other parts from damage.
Jaw Couplings are one of the first and even now most widely used 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 place or spider. The 3 piece style makes them simple to work with and popular on applications such as for example pumps, enthusiasts, blowers and compressors.

Jaw Couplings require no lubrication and offer high reliability for light to medium duty applications with good alignment of equipment and no requirement of torsional dampening.

In regular operating conditions there is no metal to metallic contact therefore the life of the hubs is virtually indefinite. Nevertheless, in a catastrophic failing of the element the load would be carried by the hubs providing a degree of failure protection. Jaw couplings are resistant to oil, dirt, wetness and grease.

Specific element materials are available to achieve optimum performance for the operating 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 has a temperature operating range ideal for most commercial applications and permits up to 1 1 degree misalignment capability of the linked shafts. NBR may be the most economically priced option.