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Shaft Couplings and Collars

Shaft couplings and collars are integral components of many mechanical systems, providing a means to transfer torque, align shafts, and secure features. A shaft coupling connects two shafts at their ends to transmit power, allowing for slight misalignment or movement. Shaft collars are found in power transmission applications, primarily motors and gearboxes. Their simple design provides easy installation and durability, making them a key component in many industrial applications.

Shaft Couplings and Collars BY CATEGORY

Beam Couplings

Beam Couplings

Flexible beam or helical element utilized to connect two shafts, providing torque transmission while accommodating misalignment and offering high torsional stiffness and minimal backlash.

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Universal Joints

Universal Joints

Utilized to connect two shafts at an angle, allowing for torque transmission while accommodating misalignment and providing flexibility in angular motion, making them suitable for applications that require rotational power transmission in non-collinear shaft arrangements.

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Gear Couplings

Gear Couplings

Utilizes gear teeth to connect two shafts, providing high torque transmission, precise alignment, and resistance to misalignment, making them suitable for heavy-duty applications requiring reliable power transmission and angular flexibility.

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Bellows Couplings

Bellows Couplings

Flexible bellows element to connect two shafts, allowing for torque transmission while accommodating axial, angular, and parallel misalignments, as well as providing protection against vibration and backlash.

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Grid Couplings

Grid Couplings

Utilizes a grid or lattice structure to connect two shafts, providing torque transmission while accommodating misalignment, reducing shock loads, and dampening vibrations, making them suitable for applications that require high performance and reliability.

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Oldham Sliding Disc Couplings

Oldham Sliding Disc Couplings

Utilizes sliding discs to connect two shafts, providing torque transmission while accommodating misalignment, offering high torsional stiffness, and minimizing backlash, making them suitable for applications that require precise motion control.

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Diaphragm Couplings

Diaphragm Couplings

Utilizes a flexible diaphragm to connect two shafts, allowing for torque transmission while accommodating misalignment, axial motion, providing excellent torsional stiffness, and minimizing backlash and vibration.

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Universal Lateral Couplings

Universal Lateral Couplings

Mechanical devices designed to connect two shafts that are not collinear and have a lateral or offset misalignment, allowing for the transmission of torque and rotational motion.

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Elastomeric Sleeve Couplings

Elastomeric Sleeve Couplings

Flexible elastomeric sleeve to connect two shafts, providing torque transmission, vibration damping, and misalignment compensation, providing shock absorption and noise reduction.

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Coupling Accessories, Parts & Kits

Coupling Accessories, Parts & Kits

Supplementary components and assemblies that complement or enhance the functionality of couplings, facilitating maintenance and repair solutions for coupling systems.

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Shaft Collars

Shaft Collars

Used to secure and position components on a shaft, preventing unwanted movement or shifting, and providing a reliable grip, alignment, and support for various applications in machinery and equipment.

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Specialty Couplings

Specialty Couplings

Diverse range of couplings designed for specific applications or unique requirements, such as high-speed applications, corrosive environments, high temperature or cryogenic conditions, large misalignments, engineered for accommodating specific industry needs.

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Disc Couplings

Disc Couplings

Utilized to connect two shafts and transmit torque while accommodating misalignment through the use of flexible metallic discs.

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Pin & Bush Type Couplings

Pin & Bush Type Couplings

Utilizes pins and bushings to connect two shafts, allowing for torque transmission while accommodating misalignments, absorbing shocks, and reducing vibrations.

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Shaft Adapters

Shaft Adapters

Used to connect two shafts of different sizes or types, allowing for compatibility and secure transmission of torque and rotational motion in applications where different shaft sizes or configurations need to be joined together.

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Chain Couplings

Chain Couplings

Utilizes interlocking chains to connect two shafts, allowing for torque transmission while accommodating misalignment and providing high strength and durability, making them suitable for heavy-duty applications.

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Jaw Couplings

Jaw Couplings

Curved elastomeric "jaws" utilized to connect two shafts, providing torque transmission while absorbing shock and vibration, misalignment compensation, and offering ease of installation and maintenance

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Tire Couplings

Tire Couplings

Utilizes a flexible tire-like element to connect two shafts, providing torque transmission while absorbing shock, vibration, and misalignment, offering high misalignment capacity and dampening characteristics.

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Rigid Couplings

Rigid Couplings

Provides precise alignment, high torque transmission, minimal backlash, stability, and durability, making them a reliable choice for well-aligned shaft applications.

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About Shaft Couplings and Collars

Shaft couplings and collars are integral components in machinery that allow power transfer between different parts. They come in various types, each with distinct features and uses. Rigid couplings are known for their ability to hold two shafts in precise alignment but require highly accurate alignment to function correctly. Flexible couplings, on the other hand, can tolerate some misalignment while still transmitting torque. Examples include jaw, elastomeric sleeve, gear, beam, and disc couplings.


Tire couplings are critical components in machinery, providing a flexible connecting link between two shafts. They work by transmitting torque from one shaft to another, compensating for misalignment, and absorbing shocks and vibrations. The coupling has two flanges or hubs, each attached to the shaft. These hubs are connected by a rubber element known as a "tire." The tire allows flexibility, absorbs shocks and vibrations, and accommodates any misalignment between the shafts. The design of the tire coupling ensures a long lifespan with minimal maintenance, and its easy installation facilitates a convenient solution for many industrial applications.


Universal lateral couplings are mechanical components that allow lateral, angular, and axial displacement between two entities, typically in industrial machinery or piping systems. These couplings accommodate movements and diminish vibration, reducing stress on the design and prolonging its lifespan. They are "universal" because they are adaptable to various applications, providing flexibility and resilience in different operational contexts.


Grid couplings are another type of flexible coupling used in various mechanical systems to transmit torque between two shafts that are not collinear. By flexing a serpentine metal grid, they accommodate varying degrees of misalignment, including angular, parallel, or a combination of both. This grid pattern also provides a cushioning effect, reducing vibration and impact stresses, thereby increasing the lifespan of the machinery. The design of grid couplings makes them ideal for demanding applications due to their durability, strength, and versatility.


In contrast, shaft collars are more for positioning or load bearing and are often used in applications where components must be positioned along a shaft. Quick-release collars and one-piece and two-piece clamping collars are common types, each offering unique advantages.


MRO Supply can accommodate all coupling and collar requirements, including specialty couplings, shaft adapters, universal joints, and coupling accessories. As your trusted industrial partner, MRO is here to offer our expertise and guidance in selecting couplings and collars from reputable manufacturers that align with your requirements.

Shaft Couplings and Collars BLOGS

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