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Gear Couplings

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

Gear couplings offer efficient torque transmission in a compact mechanism and permit a high degree of axial movement. However, gear couplings require piloting and may malfunction at very high or very low torques. Crowned tooth flanks allow angular displacement to occur between each gear. Read More…

Gear Couplings Gear couplings connect two shafts together through interlocking teeth that transmit power, absorb vibration and allow for slight angular displacement. Gear couplings transport torque between two shafts that are not coaxial or collinear. Each shaft consists of a flexible joint, which is fixed to the shaft. The joints of the shafts are connected by a spindle, a third shaft.
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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 $$$

Bartlett, IL  |  888-534-1222

Wittenstein, formerly known as Alpha Gear Drives, is known worldwide for its research, development, production and sales of high-precision planetary gear reducers and motion control systems. For 25 years we have been a speed reducer manufacturer of right angle gear boxes, worm gearboxes, servo worm gear speed reducers, high precision rack and pinion, linear actuators and rotary servo actuators.

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Wittenstein, Inc. $$$

Santa Maria, CA  |  877-353-9873

Helical Products was conceived in 1958 when George Sabadash developed the concept and method of producing the HELI-CAL Flexure as a single piece flexible coupling/coupler. In addition to our standard shaft couplings, we can design and manufacture special or custom couplings to meet your requirements that exceed the capabilities of our standard lines. A consultation with our Helical factory engineers is at "no charge." We urge you to use this service or call the Helical representative near you.

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Helical Products Company, Inc. $$$

Wilmington, MA  |  800-695-5551

Since 1975, Stafford has been your super source for superior shaft couplings and has grown and developed to be much more, providing a wide assortment of components for power transmission, motion control and other applications. Stafford has the industry-leading capabilities for custom manufacturing, so let its experienced professionals put their experience and expertise to work for you.

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Stafford Manufacturing Corp. $$$

Morristown, TN  |  800-251-9012

Renold Jeffrey is an international manufacturer and distributor of engineering products. Our history and experience dates back to 1864 and our tradition of quality continues. All of the items in our large product line are engineered for precision and performance including our roller and conveyor chains, gearboxes, flexible shaft couplings, material handlers and freewheels among many others.

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Renold Jeffrey $$$
placeholder image DieQua Corporation Wittenstein, Inc. Helical Products Company, Inc. Stafford Manufacturing Corp. Renold Jeffrey

Two coaxial shafts can also be connected by a single joint gear coupling, known as a gear-type flexible or flexible coupling. Slight misalignments of 0.5° to 5° are tolerated by this type of gear coupling.

Gear couplings and universal joints are used in similar applications, most predominantly in the automobile industry. While gear couplings have higher torque density, universal joints induce lower vibration than gear couplings. The gear teeth in a gear coupling have high backlash, which can contribute to vibration, to allow for angular misalignment. Gear couplings are found in all rear-wheel and four-wheel driven passenger cars.

Continuous Sleeve Gear Coupling Gear Couplings - Lovejoy, Inc.

In a gear coupling, the two shafts being joined meet in the third shaft which contains gears. The teeth interlock with each other to rotate and, in doing so, they transfer torque, power and energy. Every gear coupling has differing stall speeds, which is the highest speed that the gears can turn when maximum input power is applied. Flexible shaft couplings such as gear couplings are necessary because during operation, some types of shafts tend to shift, causing misalignment.

Shaft movement is caused by bumps or vibration and it results in parallel, angular or skewed shaft misalignment. Flexible shaft couplings provide efficient accommodation for moderate shaft misalignment that occurs when the shafts' axes of rotation become skewed. There are many different kinds of shaft couplings. The bellows coupling has two hubs and a thin walled metallic bellows and can accommodate all three types of misalignment.

Single beam couplings are usually made of a single piece of aluminum and have a system of spiral cuts that allow it to bend in order to accommodate angular misalignment. Multiple beam couplings consist of two to three overlapping beams that address problems of torsional rigidity. The Oldham coupling consists of three components: two hubs and a central plastic disk. It accommodates slight parallel misalignment, while providing almost zero backlash.

Gear Couplings Informational Video