Jaw Coupling

A jaw coupling is a kind of general purpose power transmission coupling that also can be utilized in movement control (servo) applications. It is designed to transmit torque (by linking two shafts) while damping program vibrations and accommodating misalignment, which protects other parts from damage.
Jaw Couplings are one of the first and still most widely used elastomer couplings in the world because of their inherent simplicity. Two similar hubs with 3 encounter lugs are connected through a star shaped element, sometimes referred to as an insert or spider. The 3 piece design makes them easy to work with and well-known on applications such as for example pumps, followers, blowers and compressors.

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

In regular operating conditions there is no metal to metal contact therefore the life of the hubs is practically indefinite. However, in a catastrophic failure of the element the load would be carried by the hubs providing a amount of failure safety. Jaw couplings are resistant to essential oil, dirt, moisture and grease.

Specific element materials can be found to achieve optimum performance for the functioning conditions.

The standard element material is NBR (N)-‘Synthetic Rubber’. It is highly flexible, essential oil resistant and the torsionally softest of the component options. It includes a temp operating range suitable for most industrial applications and permits up to 1 1 degree misalignment capacity of the connected shafts. NBR is the most economically priced option.