Jaw Couplings

We supply a complete range of jaw couplings online through our website, in a variety of sizes, made of different materials and suitable for many types of applications. You can be sure, therefore, that you’ll be able to find the couplings you need. If you can’t, or you’re unsure what you need, we’ll be happy to help.

Features and Uses of Jaw Couplings

Jaw couplings are made up of three main parts: two metallic hubs that may be made of aluminium, iron or steel (the latter two being necessary for high speeds), and an elastomer insert that is referred to as an element or spider. The parts are fitted together so that the jaw from each hub fits alternately with the spider’s lobes. Torque is then transmitted through the elastomer lobes while in compression.

This type of coupling is usually treated as being fail-safe since a failure or wearing of the elastomer will cause the hub teeth to mate and continue to transmit torque. However, couplings are available in straight and curved tooth jaw versions and the former can include an elastomer in-shear design that is not fail-safe since a failure of the elastomer will cause no torque transmission due to the coupling hub teeth not being inter-meshed.

Curved jaw couplings are most suited to applications where accuracy is needed on stopping to carry out precision tasks, reducing the settling time and increasing throughput. Straight jaw couplings, however, are more suitable for applications where accuracy is needed during movement, requiring a coupling that is torsionally stronger. We also stock a wide range of taperlock bushes, rubber anti vibration mounts, cylindrical roller bearing so don't delay and get in touch today!

Considerations when Choosing your Jaw Couplings

When selecting jaw couplings, you need to take into account the type of application since this will help to determine the materials used, particularly in terms of hardness. You also need to consider the elastomer’s ability to dampen vibration, the speed of equipment, temperature range, chemical conditions and the ability to handle misalignment. In the latter case, the flexibility of the elastomer ring allows the coupling to compensate for axial, parallel and angular displacement, although limitations will be placed on the amount of misalignment that can be handled.

Over-exposure to certain chemicals can cause a hub failure, as can exposure to extreme temperatures, over-torque and excessive vibrations. It’s vital, therefore, that all operational factors are taken into account when choosing couplings. Additionally, elastomers need to be checked for wear, which can be hastened by operating conditions and lead to early failure.

The greatest efficiency and reliability will be assured by selecting your couplings carefully and ensuring that the optimal operating conditions are applied. The most important factor is ensuring that the jaw coupling are machined with overall precision of a high standard, which applies to every part we supply. If you need further assurance or assistance, get in touch and we’ll make sure you have the most appropriate components for every job. Read Less