Bellows and Disc Couplings with Keyways

Ruland Manufacturing Co., Inc.
October 7, 2014


Keyways are now available as a standard option on Ruland bellows and disc couplings.

Marlborough, MA - Ruland now offers bellows and disc couplings with keyways as standard stock items. Keyways increase torque capacity by creating a positive drive while ensuring precise hub positioning. Bellows and disc couplings from Ruland have a balanced design reducing vibration at high RPM and are ideal for highly accurate positioning systems in industries such as semiconductor, solar, printing, packaging, and medical.

Ruland bellows couplings are zero-backlash and have no moving parts, ensuring a long maintenance free life. They are comprised of two anodized aluminum hubs and a stainless steel bellows creating a lightweight, low inertia coupling that is ideal for applications with high precision and rapid accelerations/decelerations and direction changes. The thin walls of the bellows accommodate small amounts of misalignment and maintain low bearing loads while remaining rigid under torsional loads.

Disc couplings from Ruland are a simple assembly that requires zero maintenance. They are torsionally rigid, have low inertia, and operate with zero-backlash. Ruland offers disc couplings in single disc style for compact installations or double disc style for higher misalignment capabilities. Both styles are well suited for precision applications that require more misalignment capability than bellows couplings. Center spacers on double disc couplings are available in anodized aluminum for high torque capacity or electrically insulating acetal.

Bellows and disc coupling hubs are offered in clamp and set screw styles with or without keyways. Bellows couplings are available with bore sizes from 1/8" (3mm) to 1" (25mm) and disc couplings with bore sizes from 1/8" (3mm) to 1-1/4" (32mm). All hardware is metric and tests beyond industry standards for maximum torque capabilities. Stainless steel hubs and custom designs are available by special request.

Bellows and disc couplings are part of Ruland's complete zero-backlash coupling line which includes: rigid, beam, bellows, disc, jaw, and oldham. All Ruland couplings are manufactured in its Marlborough, Massachusetts factory and are RoHS2 and REACH compliant.

Established in 1937, Ruland focuses on the design and manufacture of high performing shaft collars and couplings. All products are carefully manufactured in Marlborough, Massachusetts under strict controls using proprietary processes. 3D CAD files, full product specifications, and additional technical information, are available at

Product Link:   Disc Couplings Bellows Couplings

Ruland Manufacturing Co., Inc.

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