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A jaw premye gwoup is a type of general purpose power transmission coupling that also can be used 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 components from damage.
Jaw Couplings are among the first and still most widely used elastomer couplings in the world due to their inherent simplicity. Two identical hubs with 3 face lugs are connected through a superstar shaped element, sometimes known as an place or spider. The 3 piece style makes them easy to work with and popular on applications such as for example pumps, followers, blowers and compressors.

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

In normal operating conditions there is absolutely no metal to metal contact therefore the life of the hubs is virtually indefinite. Nevertheless, in a catastrophic failure of the element the load would still be carried by the hubs offering a degree of failure safety. Jaw couplings are resistant to oil, dirt, dampness and grease.

Specific element materials are available to achieve maximum performance for the working conditions.

The standard element material is NBR (N)-‘Synthetic Rubber’. It is highly flexible, essential oil resistant and the torsionally softest of the element options. It includes a heat operating range ideal for most commercial applications and permits up to at least one 1 degree misalignment capacity of the connected shafts. NBR may be the most economically costed option.