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Jaw Couplings

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Jaw couplings are resistant to oil, dirt, grease, sand and moisture and do not require any lubrication. One drawback of jaw couplings is that they lack misalignment capability. Unlike a bellows coupling which is flexible, jaw couplings will come apart if the axial motion is too great. Read More…

Jaw Couplings Jaw couplings are a type of compression coupling that control motion by transmitting torque and dampening vibrations that could cause damage to other system components. They are composed of a polyurethane-based elastomeric part called a spider that joins two hubs made of sintered metal, aluminum, standard steel, stainless steel, bronze or iron. These three parts are press fitted together with a jaw from each hub fitting into the elastomeric element's grooves.
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Leading Manufacturers

Bloomingdale, IL  |  630-980-1133

Our shaft couplings are the best around! Not only do we provide you with exceptional levels of customer service but we also provide you with manufacturing and a repair service that you can count on. We are also capable of providing you with special designs. That’s right! Our design team will work closely with you in order to ensure that you are getting the product that will fit your specific requirements perfectly! Call or email us today for more information!

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DieQua Corporation $$$

Marlborough, MA  |  800-225-4234

Ruland’s carefully made shaft collars, rigid shaft couplings & zero backlash motion control flexible shaft couplings, including beam, Oldham & bellows couplings, are available in both inch & full-metric dimensions. Our line has expanded to include metric shaft collars, metric rigid couplings & step bore rigid couplings. For 70 years, we have supplied custom-made products to meet special needs.

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Ruland Manufacturing Company, Inc. $$$

Orleans, MA  |  508-525-2533

Hersey Clutch has been in business since 1963. With that kind of background and experience we have becomes leaders in application engineering. We specialize in finding solutions to our customer's problems regarding industrial power transmissions, brakes, clutches, couplings, universal joints, gearboxes, speed drives, friction material, crane electrification and more. Let us help you today!

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Hersey Clutch Company $$$

Vancouver, WA  |  800-736-0194

US Digital designs and manufactures flexible shaft couplings for motion control, automation and robotics. We ship standard products directly to domestic and international customers. We also offer optical encoders, inclinometers and switching power supplies plus other products.

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US Digital $$$

Westwood, NJ  |  888-746-4333

Ringfeder is a component and system provider with a global presence. Serving all industries including packaging, automation, energy, mining and transportation and defense. Ringfeder offers premium products including locking devices, shaft couplings and dampening technologies. Included in the coupling line are torsionally rigid disk, elastomeric and backlash-free servo-insert and metal bellows couplings.

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Ringfeder Power Transmission $$$
placeholder image DieQua Corporation Ruland Manufacturing Company, Inc. Hersey Clutch Company US Digital Ringfeder Power Transmission

Angular or parallel misalignment can cause it to bear loads that are higher than other similar couplings. Jaw couplings have the basic shape of a gear but are in fact quite different from gear couplings.

Jaw couplings do not use the large blunt teeth to move or rotate as would be the case in a set of gears. Instead they provide interlocking action for the spider and hub, keeping the assembly together while providing effective vibration dampening. Jaw couplings are used as motor couplings for pumps, gear boxes, compressors, blowers, mixers and conveyers for industrial manufacturing applications.

Jaw In-Shear Coupling Jaw Couplings - Lovejoy, Inc.

The elastomeric element is often referred to as a spider because of its shape-circular with an even number of legs jutting out. It serves to dampen impulse loads and minimize shock to a motor. The polyurethane used can be either soft, which provides better vibration dampening, or hard, which gives the spider more strength. The elastomeric material that the spider is made out of is available in different degrees of hardness which gives the operator more control over how much vibration the coupling absorbs.

It can be customized to the specific application. The hubs have curved jaws that interlock and reduce deformation of the spider which prevents backlash. These couplings are considered fail safe because if the spider malfunctions, the jaws of the two hubs interlock and create direct power transmission so the vehicle can shut down safely. Jaw couplings perform the best for applications that use a stop-and-go type of movement that also require accuracy.

Varying amounts of vibration absorption have a direct effect on the length of settling time where the system pauses briefly to perform an action or movement quickly and precisely. If vibrations are mostly absorbed then the system does not have to hesitate before performing an action which increases the speed of the line. Jaw couplings are accurate while still; they are not optimal for applications in which precise movements are required during movement.

Jaw Couplings Informational Video