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Flexible Couplings

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About Flexible Couplings

Flexible couplings couple or connect rotating members such as motors and drive shafts while allowing misalignment in either angular or parallel offset orientation. Flexible coupling types include sliding block, metal contoured diaphragm, roller or silent chain, steel grid, coil spring, wafer or flexible disc, Schmidt, beam or flexured (helical), gear or multi-jaw, metal bellows, elastomeric tire, magnetic, and flexible link. 

Sliding blocks are slotted or jawed flanges on shafts that transmit torque through a captured sliding disk or block. Metal contoured diaphragms transfer torque through contoured, metallic diaphragms and provide high horsepower and revolutions per minute (RPM). Roller or silent chain couplings have sprockets on each shaft coupled by a chain or chains. They are useful for heavy-duty, high torque applications.  Steel grids have slotted flanges on each shaft coupled by a flexible steel band that is laced through the slots. They provide good shock absorption.  Coiled spring flexible couplings couple shafts with a coiled spring and are suitable for instrument and low horsepower applications. Wafer or flexible disc couplings apply torque through sheet-metal plates mounted to shafts and intermediate plates by two-point supports. They are suitable for light- to moderate-duty applications. Schmidt couplings transmit torque through a series of plates connected by links and allow large lateral misalignment. Beam, flexured or helical couplings prevent backlash and provide constant velocity with angular misalignment. With gear or multi-jaw couplings, gears with external teeth are mounted on shafts. A sleeve with internal teeth fits over the gears. These couplings provide high torque and allow axial misalignment, but usually needs lubrication and good shaft alignment.  Metal bellows are high speed couplings that prevent backlash and do not provide cyclic speed variation. They are designed for light-duty applications. Elastomeric tire-shaped flexible couplings are shaft hubs attached to either side of an elastomeric "tire.” They accommodate angular and parallel misalignment and end-float. Magnetic couplings are permanent magnets mounted on shafts separated by nonmagnetic barrier. Torque ratings to 500 ft.-lb. can eliminate the need for seals.  Flexible links are three cantilevered beams or links arranged in a triangle and are attached to hubs and torque sleeves. These flexible couplings can handle angular, parallel, axial misalignment.

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Engineering Web: Flexible Couplings

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Rocom Precision Rotary Components - Flexible Shaft...

See Rocom Corporation Information
Flexible Couplings, Bellows, Shaft, Helical, Rigid, Oldham...
offers: Magnetic Couplings, Flexible Couplings, Rigid Couplings, Oldham Couplings, Bellows Couplings, Flexible Shaft Couplings, Spider Type Flexible
See Stock Drive Products/Sterling Instrument - SDP/SI Profile & Catalog
Flexible Shaft Couplings, Torque Limiters, Bellows + Jaw...
R+W offers state-of-the-art flexible shaft couplings, motor couplings, and line shafts for any precision application: backlash-free torque limiters,
See R+W Coupling Technology Profile & Catalog
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Part Numbers for Flexible Couplings

Part # Distributor Manufacturer Product Category Description
4P003 Grainger Industrial Supply FERNCO Flexible Fittings Flexible Coupling,1 1/4 x 1 1/4 In,PVC
4P009 Grainger Industrial Supply FERNCO Flexible Fittings Coupling,3 In
4P007 Grainger Industrial Supply FERNCO Flexible Fittings Coupling,2 In
2ZJ83 Grainger Industrial Supply FERNCO Flexible Fittings Shielded Coupling,Inside Dia 1 1/2 In
2ZJ84 Grainger Industrial Supply FERNCO Flexible Fittings Shielded Coupling,Inside Dia 2 In

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