Shaft Couplings/

Bellows Couplings

Bellows couplings are connectors for shafts and equipment that require flexibility and non-linear alignment. These devices are composed of a rigid bellow and a coupling that transmits mechanical power between shafts, maintains constant velocity and compensates for axial motion and parallel or angular misalignment. Typically the bellows are made from stainless steel which is an excellent transmitter of torque. The coupling is made of aluminum which makes these devices exceptionally lightweight and durable. Bronze is also sometimes used. The walls are thin enough to allow the coupling to flex while remaining relatively rigid.

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R + W America, LP
Bensenville, IL
888-479-8728
Offering the ultimate in couplings, R + W America is a versatile and innovative shaft coupling manufacturer for power transmission applications in a wide range of industries. As an ISO 9001 certified company, R + W America is able to meet special requirements and provides precision and quality in a complete line of rigid and flexible shaft coupling products including bellows couplings and more.
 
Guardian Industries, Inc.
Michigan City, IN
219-874-5248
As a world leading shaft coupling manufacturer, Guardian Industries provides custom design and manufacturing as well as stock coupling products including bellows couplings and many more. With over 60 years of experience, Guardian Industries features continuous product improvements and competitive pricing on high quality power transmission components for use in a broad spectrum of industries.
 
Elbe & Sohn Inc.
South Haven, MI
269-637-7999
As a leading power in the power transmission industry, Elbe & Sohn Inc. provides a complete range of shaft couplings and other parts including bellows couplings to a variety of industries such as industrial, automotive and marine. With a location in the US and several production facilities across Europe, Elbe & Sohn is an international driving force in the field of power transmission technologies.
 
Ringfeder Power Transmission
Westwood, NJ
888-746-4333
Ringfeder Power Transmission is a component and system manufacturer with a global presence. Serving all industries including packaging, automation, energy, mining, transportation and defense, Ringfeder PT offers flexible, torsionally rigid disk, backlash-free servo-insert, safety overload, bellow and magnetic couplings and a complete line of Ringfeder® & Ecoloc® keyless shaft-hub locking devices.
 
DieQua Corporation
Bloomingdale, IL
630-980-1133
As a manufacturer and supplier of shaft couplings and other power transmission parts, DieQua Corporation offers optimum solutions for customer requirements and welcomes any and all design challenges. Dedicated to customer service and the search for innovative product technologies, DieQua provides premium quality shaft couplings including bellows couplings, zero backlash couplings and more.
 
Ameridrives Couplings
Erie, PA
814-480-5000
Began in 1928, Ameridrives Couplings is an international manufacturer of mechanical power transmission products, pioneering many improvements over the years. Complete line of coupling products includes Amerigear gear couplings & spindles, Ameriflex diaphragm couplings, Ameridisc high performance disc couplings & universal joints. We are your single source solution for Driveline Connections.
 
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Industry Information

Bellows Couplings

Bellows couplings are cylindrical with flexible rings acting as the coupling. On either side are solid metal ends that connect to shafts or other components. They are typically quite short in length and range in diameter size from 1/8 inch to a full inch; custom or specialty sizes are available but do not greatly vary in construction or function. Like shaftwheel couplings they are constructed to reduce vibration when used in applications with high rotations per minute (rpm). Mostly used in industrial machinery, bellows couplings create a quiet, smooth operation in systems with high levels of torsional integrity like encoder drives, closed loop servo systems, motion control instrumentation, robotics, CNC machine tools and precision positioning.

Mechanical flexible couplings are made of loose fitting parts that move in a sliding and rolling manner; bellows couplings fit this category because they have a coil that allows them to move. Unlike other mechanical flexible shaft couplings, these generally need no lubrication. They offer a near-infinite life span and are virtually maintenance free. Their connection is hidden within the fit-length of the hub, enabling exact transmission of angular motion and torque. Bellows couplings operate at high speeds anywhere from 12,000 to 32,000 rpm and absorb eccentricity and angularity. They are oil- and chemical-resistant, have thin and lightweight yet strong walls and offer easy and simple mounting and dismounting. Bellows couplings exhibit high torsional stiffness and zero backlash. The most common methods of construction for flexible couplings such as these include electroforming, chemical deposition, mechanical forming and welding.  Electroformed bellows couplings are made by adding layers of metal on a mandrel until the desired thickness is reached and the mandrel is melted away to leave behind the bellows. Chemical deposition is a similar method except that the materials are added by electrodeposition. Mechanical forming includes roll-forming or extrusion. Welded bellows couplings are made by welding a series of rings or washers on both their inside and outside.