Set different bearings isolated white background. 3D illustratio


·Rigid Coupling


Rigid couplings are a type of coupling that should only be utilized when shafts are precisely in line. A rigid coupling is only suitable for shafts in close alignment or held in alignment. If not aligned, torque will transfer to the shafts and bearings and likely cause premature failure. Unlike most other types of couplings, there is no flexible element in a rigid coupling.

There are three main types of rigid couplings: sleeve, flanged and clamped. For commercial shafting, a rigid coupling may be a sleeve with the shafts pressed into each end or it may be a clamping sleeve. The sleeve on each shaft end may have an external flange with bolt holes. Couplings for large power machines are bolted together to hold the shafts rigidly; therefore the shafts must be accurately aligned before assembly.

Please contact US to assist in recommending the right Rigid Couplings for your application.

·Jaw Coupling

A jaw coupling is a type of coupling designed to transmit torque while damping system vibrations, which protects other components from damage. Jaw couplings are considered the most popular couplings utilized in industry for relatively small shaft sizes. Jaw couplings are composed of three parts: two metallic hubs and a insert, which is referred to as a “spider.” The three parts press fit together with a jaw from each hub fitted alternately with the lobes of the spider. The curved jaws of the hubs reduce deformation of the spider to maintain the zero backlash fit. It is important to note that most manufacturers sell the components of a jaw coupling separately. Most applications will require the hubs to have different bore sizes, as the shafts are unlikely to be the same size.

The spider (or jaw coupling insert) can be made of various materials or durometers, which allows the user to customize the coupling so that it absorbs more or less vibration. The more damping ability the jaw coupling has, the less torsion strength it possesses. Jaw couplings are best suited for applications that rely on a stop-and-go type of movement. The jaw coupling is less suited for applications that rely on a constant scanning type of motion, where accuracy is required during movement, which requires a torsionally stronger coupling.

The drawback of the jaw coupling is the lack of misalignment capability. Too much axial motion will cause the coupling to come apart, while too much angular or parallel misalignment will result in bearing loads that are higher than most other motion control couplings. Jaw couplings are also considered fail-safe. If the spider fails, the jaws of the two hubs will mate, much like teeth on two gears, and continue to transmit torque. This may or may not be desirable to the user depending on the application. Jaw couplings are well balanced and able to tolerate high RPM. With its damping capability and interchangeable spiders, jaw couplings make a great solution for shock absorption.

Please contact US to assist in recommending the right Jaw Couplings for your application.

·Grid Coupling


Grid couplings use two slotted hubs with a steel grid running between them to transmit torque. Grid couplings are available in horizontal and vertical styles. The grid coupling flexes by allowing the grid to slide along the slots in the hubs. Grid couplings can only accommodate 1/3° misalignment and transmit torque from 422 in-lbs to 2,700,000 in-lb (3,656,555 Nm).

Grid couplings are noted for reducing vibration, absorbing shock and compensating for misalignment. The flexible nature of the spring-like grid absorbs impact energy by spreading it out over time, thus reducing the magnitude of the peak loads. This is possible because of the progressive contact that occurs between the curved profile of the hub teeth and the flexible grid. Therefore, as the load increases, more of the tooth comes into contact with the grid, thus supplying superior protection and supreme performance. Grid Couplings are fully interchangeable between manufacturers. The grid coupling is noted for being simple to install and maintain, reducing downtime.

Please contact US to assist in recommending the right Grid Couplings for your application.

·Chain Coupling


Chain couplings are utilized to transmit power between two shafts. Generally, chain couplings will be installed off the end of a motor or reducer (gearbox) and utilized to connect to a machine for efficient power transmission. A complete chain coupling consists of two hubs (or sprockets), one coupling chain, which appears similar to a strand of double roller chain and a cover. Not all applications will utilize a cover, however for both safety and coupling life they are recommended. Chain couplings are normally utilized in low speed, high torque applications and allow for 2 degrees misalignment between shafts. Chain couplings are considered an economical way to transmit power between shafts. 

Please contact US to assist in recommending the right Grid Couplings for your application.