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Fluid Coupling Manufacturers and Companies

IQS Directory provides a detailed list of fluid coupling manufacturers and suppliers. Find fluid coupling companies that can design, engineer, and manufacture fluid couplings to your specifications. Peruse our website to review and discover top fluid coupling manufacturers with roll over ads and complete product descriptions. Connect with the fluid coupling companies through our hassle-free and efficient request for quote form. You are provided company profiles, website links, locations, phone numbers, product videos, and product information. Read reviews and stay informed with product new articles. Whether you are looking for manufacturers of hydrodynamic couplings, hydraulic fluids, and rotary fluid couplings of every type, IQS is the premier source for you.

  • Bloomingdale, IL 630-980-1133

    Since opening our doors in 1980 we have been offering products that provide full satisfaction for our customers. We guarantee fluid couplings that will last a lifetime! Allow our qualified staff to bring to you unmatched customer service. We know it’s important to stay up on new technological innovations; this is why we have our own research and development department working constantly to keep us on the leading edge. Get in touch with us via phone or email today to find out more!

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  • Freeport, NY 888-260-7466

    When it comes to excellent fluid coupling products, Ondrives.US is able to bring you a fully customizable experience in order to ensure that your product will suit your application’s most demanding requirements. We are an ISO 9001:2015 certified industry leader that stresses great customer service, because without our clients we wouldn’t be where we are today. Contact our representatives to learn more information today!

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  • Downers Grove, IL 630-852-0500

    Resistant to oils, grease and many solvents our shaft couplings are the product that you have been searching for! All of our products are made of only the highest quality materials to ensure that they will last through all demanding applications. Our products will not let you down when it comes to excellent value and durability. We will have our staff work with you in order to find the coupling that will fit your requirements exactly. Contact us today for more information!

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  • 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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  • Alpena, MI 989-356-2187

    We know how important excellent customer service is. This is why with us you only receive the best when you work with us. Our research and development department works continually in order to ensure we are bringing you products that ride on the leading edge of innovation. We make sure all of our fluid couplings are made out of the highest quality raw materials. Come and check out our website for more information or call us today!

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  • Winsted, CT 800-545-7301

    Custom orders are the norm for us. We manufacture shaft couplings and shaft collars — jaw couplings; set collars; single and double split collars and threaded collars. These shaft couplings and collars are made in aluminum, steel (cold rolled or stainless) and nickel. They can also be nonmagnetic or metric.

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businessIndustry Information

View A Video on Fluid Couplings - A Quick Introduction

Fluid Coupling

Fluid couplings are hydrodynamic devices that transmit rotation between shafts by acceleration and deceleration of hydraulic fluid. Shafts are used industrially to provide rotary motion to a wide spectrum of vehicles and equipment and shaft couplings are key to providing secure rigid, flexible or non-linear connection between shafts, wheels and rotary equipment.

Fluid couplings consist of a housing containing an impeller on the input or driving shaft and a runner on the output shaft. Both of these contain a fluid which is usually oil that is added to the coupling through a filling plug on the housing. The impeller, which acts as a pump, and the runner, which acts as a turbine, are both bladed rotors. The components of fluid couplings are generally made out of metallic materials-aluminum, steel or stainless steel. Fluid couplings are used in the automotive, railroad, aerospace, marine and mining industries. They are used in the transmissions of automobiles as an alternative to mechanical clutches. Forklifts, cranes, pumps of all kinds, mining machinery, diesel trains, aircrafts and rotationally-powered industrial machinery all use fluid coupling when an application requires variable speed operation and a startup without shock loading the system. Manufacturers utilize these couplings to connect rotary equipment such as drive shafts, line shafts, generators, wheels, pumps and turbines in a variety of automotive, oil and gas, aerospace, water and waste treatment and construction industries.


In a fluid coupling, the impeller and rotor are both bowl-shaped and have many radial vanes. They face each other but unlike gear couplings have no mechanical interconnection and never touch. Fluid is directed by the pump into the impeller. The driving turbine or pump is rotated by an internal combustion engine or electric motor imparting both linear and rotational motion to the fluid. The velocity and energy is transferred to the fluid when the impeller rotates. It is then converted into mechanical energy in the rotor. Every fluid coupling has differing stall speeds, which is the highest speed that the pump can turn when the runner is locked and maximum input power is applied. Slipping always occurs because the input and output angular velocities are identical, and therefore the coupling cannot reach full power efficiency-some of it will always be lost in the fluid friction and turbulence. Flexible shaft couplings such as fluid couplings are necessary because during operation, some types of shafts tend to shift, causing misalignment. Flexible couplings provide efficient accommodation for moderate shaft misalignment that occurs when the shafts' axes of rotation become skewed. Shaft movement is caused by bumps or vibration and it results in parallel, angular or skewed shaft misalignment.



Fluid Coupling
Fluid Coupling
Fluid Coupling - Elbe & Sohn Inc.
Fluid Coupling - Elbe & Sohn Inc.