Zero-Backlash Jaw Couplings for Optical Inspection Systems

Ruland Manufacturing Co., Inc.
November 4, 2015


Stop-and-go inspection systems benefit from the high dampening characteristics of Ruland zero-backlash jaw couplings.

Marlborough, MA - Stop-and-go optical inspection systems often have aggressive acceleration/deceleration profiles that generate vibration and high torque values. The dampening characteristics of Ruland zero-backlash jaw couplings reduce settling time and shock loads resulting in more accurate system performance and decreased component wear.

Jaw couplings from Ruland are comprised of two hubs and an elastic insert referred to as the “spider.” Hubs are type 2024 aluminum for low inertia and have a balanced design for reduced vibration at high speeds. The spider is made of polyurethane, allowing for dampening of impulse loads minimizing shock to the motor and other sensitive equipment. Spiders are available in three durometers that offer a range of misalignment, dampening, torsional stiffness, and torque characteristics. Zero-backlash jaw couplings are highly customizable allowing clamp or set screw hubs to be combined with inch or metric and keyed or keyless bores.

Ruland jaw coupling hubs are machined with a proprietary curved jaw profile that press fits with the spider, assuring zero-backlash operation. This profile concentrates forces to the center of the spider’s limbs, improving the effectiveness of the elastomer material. If the spider fails the jaws of the two hubs will engage and continue to transmit torque allowing the application to be safely shut down for maintenance. The spider can then be replaced restoring the full performance characteristics of the coupling.

Zero-backlash jaw couplings are part of Ruland’s complete servo coupling product line that also includes rigid, beam, bellows, disc and oldham. All products are manufactured in Ruland’s Marlborough, MA factory under strict controls using proprietary processes.

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 USA factory under strict controls using proprietary processes. 3D CAD files, full product specifications, and additional technical information, are available at

Product Link:  Jaw Couplings

Article Summary
• Dampening characteristics increase system performance and minimize component wear.
• Balanced design allows for reduced vibration at higher speeds.
• Highly customizable to fit system requirements.
• RoHS2 and REACH compliant.
• Carefully made in our Marlborough, Massachusetts factory and available for immediate delivery.

Ruland Manufacturing Co., Inc.

PR Contact:
TPR International

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