A gear coupling is a flexible coupling intended to connect two shafts at their ends to transmit power to transfer rotational movement from one shaft to another. They are available in a wide range of sizes and can transmit high torque at high speed. Each coupling consists of 2 two hubs with external gear teeth, hubs are joined by flange sleeves with internal gear teeth, and flanges are bolted together. Three types of teeth designs are used in gear couplings: straight teeth, crowned with a constant radius and crowned with a variable radius. The coupling is normally enclosed. Coupling parts include gaskets and O-rings to prevent lubricant leakage filled inside the coupling. General-purpose gear couplings are typically made from carbon steel. Because of their design, these torsionally stiff couplings can withstand some shock loading, but they cannot absorb significant amounts of it.
Lubrication Importance
The couplings require periodic lubrication every 1-2 years, depending on duty and type of lubrication. If properly maintained (good lubrication and proper alignment), the coupling has a service life of 3-5 years and, in many cases, 5-10 years.
Some have a sleeve made of plastic (nylon, high molecular plastic); these don’t require lubrication. They have much lower torque capacity than steel-made couplings and are used mainly on small pumps.
Misalignment
Gear couplings can accommodate angular, parallel, and axial misalignment. This is due to clearance between gear teeth. Some have crowned teeth. This design allows higher angular misalignment hence parallel as well. Excessive misalignment will shorten your coupling life significantly. It is always good to read the manufacturer's installation instructions.
Benefits of using Gear Couplings
High torque density
three types of misalignment (angular, parallel, axial)
High torque at high speeds
Gear couplings are commonly used in metal industry steel or wire mills applications. They provide significant value in places where a high torque-to-size ratio is necessary and high-speed capabilities.
Check out our post Types of Rigid Couplings.
Feel free to Contact Us if you have any questions, need more information or if you are interested in purchasing a coupling. We can offer you standard off-the-shelf couplings or design a unique coupling to meet your requirements.
HVH Industrial Solutions is an authorized distributor of the following coupling manufacturers: Ringfeder, System Components, TB Wood’s, Ameridrives, Bibby Turboflex, and Guardian Couplings in the US.
We work closely with the engineering teams of the above companies to provide superior customer service and engineering support.
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Vladimir Harutyunyan
Vladimir Harutyunyan is the founder of HVH Industrial. He has masters degree in mechanical engineering and over 10 years of experience in mechanical power transmission field.
Feel free to connect with Vlad on Linkedin: https://www.linkedin.com/in/vladharut
Vladimir Harutyunyan
Vladimir Harutyunyan is the founder of HVH Industrial ...
Feel free to connect with Vlad on Linkedin: https://www.linkedin.com/in/vladharut
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