Power Transmission • Couplings

A coupling is a mechanical connection that brings two shafts together at the ends to allow transmit power from one rotating shaft to a non rotating shaft.

A coupling is a device used to connect the ends of two shafts in order to transmit power, while permitting some degree of misalignment, end movement, or both. Other uses include the reduction of shock load transmission from one shaft to another, protection against overloads, and alteration of vibration characteristics. There are three basic categories of couplings. Rigid couplings are used when precise shaft alignment is required, flexible couples are designed to transmit torque while allow for misalignment, and torque limiting couplings protect against overtorque. Each category includes several coupling subcategories that are focused on specific applications. Leading manufacturers: Lovejoy, R+W, PT Coupling, Coupling Corporation of America, Collars and Couplings, Ameridrives Couplings.

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  • Collars & Couplings, Inc.

    Collars and Couplings offers rigid shaft couplings with optional keyways in sizes ranging from 1/4" to 1-1/2". These couplings are constructed from black oxide materials.

  • DieQua

    DieQua manufactures zero backlash flexible shaft couplings, torque limiters, and line shafts in the following configurations: Series ZA/EZ highly rigid line shafts, Series SK/ES/ST safety couplings/torgue limiters, Series MK/FK/Ecoflex miniature bellows couplings, Series EK/TX elastomer insert jaw couplings, etc.

  • GAM Enterprises, Inc.

    GAM offers distance, safety, elastomer, and bellows couplings. Bellows couplings can handle speeds up to 25,000 RPM, temperatures up to 570°F, and torques ranging from 0.44 to 2,500 Nm. These couplings feature misalignment compensation, zero backlashes, low inertias, and high torsial rigidity ratings.

  • Guardian Industries

    Guardian Industries offers motion control couplings for zero backlash automation and robotics applications. Coupling products include high-precision/servo drive bellows, stepper drive Oldham couplings, light push/pull universal lateral couplings, lead/ball screw multi-beam couplings, and Mini Jaw all-purpose coupling assemblies.

  • Lovejoy, Inc.

    Lovejoy offers motion control couplings in a variety of configurations, including bellows, mini-disc, beam, oldham, curved jaw, mini-soft, mini-jaw, etc. These products meet the following requirements: torque, material, torsional stiffness, maximum RPM, bore capacity, maximum temperature, misalignment capacity, and moment of inertia.

  • Mayr

    Mayr offers couplings in a variety of configurations, including ROBA-DS servo, SmartFlex steel bellows, ROBA-ES elastomer, and ROBA-DS all-steel. Mayr provides an online selection tool to help determine the right coupling based on power capability, input/output design, operating temperature, and starting frequency ratings.

  • OEP Couplings

    OEP Couplings manufactures a complete line of high-performance, innovative, shaft couplings, that have been precisely machined from advanced materials. These couplings feature sub-components produced on CNC Swiss live tooling screw machines, which are capable of holding micron tolerances.

  • Rimtec Corporation

    Rimtec offers DKN Series miniature bellows, AKN metal bellows, and ADS servo-insert zero-backlash couplings. These couples come in shaft sizes ranging from 0.4" to 4", and they can transmit torques ranging from 90 to 4500 lb-in.

  • Rexnord Industries

    Rexnord Industries manufactures a variety of state-of-the-art fluid and shaft coupling designs, including fluid fixed-fill, flexible gear, flexible grid, composite, flexible disc, and elastomeric. These couplings are available in standard, dual purpose, or specialty configurations. Rexnord Thomas model 12CA040040 flexible gear couplings can handle speeds up to 150,000 RPM, horsepower ratings up to 2.6 HP, and continuous torque ratings up to 1.1 in-lbs.

  • Rino Mechanical Components

    Rino Mechanical Components offers a wide range of coupling products, including general purpose, universal joint, beam, oldham, uni-lat, plastic Step-beam, high accuracy, servo, etc. These couplings come in bore sizes ranging from 1/8" to 1-3/8", torques ranging from 3 to 3500 in-lbs, and they feature a plastic, aluminum, and stainless steel construction.

  • Rocom Corporation

    Rocom Corporation develops, designs and manufactures flexible shaft couplings for a wide range of motion control applications, including office equipment, medical equipment, rotary instruments, metrology, mass storage, IC wafer handling, electronics assembly, etc.

  • R. R. Fisher & Co

    R.R. Fisher & Co. offers line shaft, linear, elastomer, miniature, torque limiter, and bellows couplings for the following applications: mechanical synchronization, linear actuators, low/high precision servo, step encoders/motors, mechanical overload protection, etc. These couplings are maintenance, wear, and backlash-free.

  • Ruland Manufacturing Co., Inc.

    Ruland Manufacturing Co. manufactures shaft couplings and collars in a variety of configurations, including disc, curved jaw, oldham, flexible beam, bellows, rigid, double wide, threaded, quick clamp, etc. TCL one-piece threaded shaft collars come in OD sizes ranging from 5/8" to 3-1/4", widths ranging from 0.281" to 0.750", and clearance diameters ranging from 0.773" to 3.504". These collars feature temperature ranges from -40 to 350°F and width tolerances ranging from +/-0.003" to 0.010".

  • R + W America

    R&W offers flexible shaft and servo couplings in a variety of configurations, including line shafts, torque limiters, zero backlash bellows, elastomer/jaw, miniature bellows, and linear. Model MK4 miniature bellows couplings come in rated torques ranging from 0.5 to 10 Nm, OD sizes ranging from 15 to 40 mm, and lengths ranging from 22 to 56 mm.

  • Servometer

    Servometer offers flexible shaft and bellows couplings for the following applications: CNC machine tools, robotics, actuators, servos, encoders, etc. Flexible shaft couplings come in lengths ranging from 0.480" to 2.16", OD sizes ranging from 0.250" to 2.40", torques ranging from 2.0 to 4000 in-oz, and hub bore diameters ranging from 0.079" to 1.0".

  • Servo Systems Co.

    Servo Systems distributes precision flexible shaft couplings. These couplings feature a phenolic inserts for preventing heat and static electricity from damaging resolvers, encoders, tachometers, and other rotary components. They can handle peak torques ranging from 18 to 120 lb-in and come in standard bore sizes ranging from 0.125" to 0.625".

  • Candy Controls

    Candy Controls manufactures rigid, oldham, encoder, disc, curved jaw, bellows, and beam couplings. Disc couplings feature multiple shaft/bore configurations, double or single disc units, absorbent plate springs, identical counterclockwise/clockwise rotations, and high torque capacities.

  • Stafford Manufacturing Corp.

    Stafford Manufacturing offers rigid shaft couplingsin the following configurations: precision sleeve flange, shaft adapter, inch/metric conversion, 3-piece clamp-type, 2-piece clamp-type, re-machinable, 1-piece clamp-type, etc. Step-up type shaft adapters feature clamped coupling ends, a weld-less design, and a fully machinable stainless steel construction.

  • Wittenstein

    Wittenstein offers servo couplings for the following applications: robotic axes, linear actuators, CNC axes, servo drives, and servo axes. These couplings are compact, easily dismounted/mounted, balanced for high speeds, maintenance/wear-free, and high in torsional stiffness.

  • Zero-Max, Inc.

    Zero-Max offers couplings for clean room, AC/DC servomotor, and motion control applications. These come in double or single disc models, with 11 available styles to choose from. They feature 304 stainless steel disc members, operating temperatures ranging from -22 to +212°F, and torque ratings ranging from 0.5 to 250 Nm.