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Fluid Coupling

A reliable source for Shaft Coupling information and leading Shaft Coupling Companies & Manufacturers.

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. Read More…

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.
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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 $$$

Michigan City, IN  |  219-872-9100

KTR Corporation is a wholly owned and operated subsidiary of KTR Kupplungstechnik GmbH. Our extensive product line began over 50 years ago with the BoWex curved tooth gear and the ROTEX torsionally flexible jaw couplings. Today we have grown to 40 subsidiary companies in 21 countries, and over 15 complete coupling platforms.

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KTR Corporation $$$

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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Lovejoy, Inc. $$$

Jacobus, PA  |  800-394-3466

Coupling Corporation of America is a premier manufacturer of flexible shaft couplings (UltraFLEXX Couplings), flexible drive couplings, clutch couplings, universal joints and drive shafts. Our couplings are engineered for the most demanding applications. Go ahead, put them to the test.

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Coupling Corporation of America $$$

Bensenville, IL  |  630-521-9911

R+W— the leading provider for quality shaft couplings. With the highest precision products available with the broadest variety of mechanical interface imaginable, R+W can meet your needs. Call R+W’s specialists for more information and get the ultimate connection. R+W’s focus is on DRIVE; Dynamic, Reliable, Innovative, Versatile & Expansive, to promote quality service.

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R+W America $$$
placeholder image DieQua Corporation KTR Corporation Lovejoy, Inc. Coupling Corporation of America R+W America

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.

fluid Fluid Coupling - Fernco

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 Informational Video