Posted May 10, 2024

Ruland bellows, disc couplings for higher torque 

Ruland Manufacturing now offers bellows and double disc couplings with bore sizes up to 1-3/4 in or 45 mm for use in systems with torque up to 1,4000 in-lbs (158 Nm).

Ruland bellows

Ruland bellows couplings (above) and disc couplings now have bores up to 1-3/4 in (45 mm) and torque up to 14,000 in-lbs. (158 Nm).

Ruland discs
The double disc design allows the sets of disc springs to operate independently of each other for full misalignment capabilities.

High torque applications commonly found in precision semiconductor, solar, convey-or, and factory automation applications often use these shaft sizes. Ruland disc and bellows couplings accommodate all forms of misalignment, are zero-backlash, and have a balanced de-sign for reduced vibration at speeds up to 10,000 rpm.

Ruland bellows couplings have the highest size-for-size torque and torsional stiffness capacity of Ruland flexible couplings. They are comprised of two anodized aluminum hubs mated to a stain-less steel bellows. The thin walls of the bellows allow it to remain flexible under misalignment conditions while maintaining rigidity under torsional loads.

Double disc couplings offer more misalignment than bellows couplings at the expense of torque and stiffness. They are made from two anodized aluminum hubs, two sets of disc springs, and an anodized aluminum center spacer. The double disc design allows the sets of disc springs to operate independently of each other for full misalignment capabilities.

"The expansion of our bellows and disc coupling product lines to incorporate couplings with high-er torque capacity, allows designers to use a Ruland coupling with larger shafting," says Bill Hewitson, President of Ruland Manufacturing. "Through our design process and rigorous physi-cal product testing, we are bringing to market couplings that exceed what is currently available. I look forward to partnering with our many OEM and distribution customers on these new prod-ucts."

Ruland manufactures disc and bellows couplings from meticulously selected North American bar stock in 2024 aluminum for lightweight and low inertia. They are offered with clamp style hubs with or without keyways in bore sizes ranging from 1/8 in (3 mm) to 1-3/4 in (45 mm). Bellows and disc couplings are carefully made in Ruland’s ISO 9001:2015 certified advanced manufac-turing facility in Marlborough, Massachusetts, under strict quality controls using proprietary pro-cesses. They are RoHS3, REACH, and Conflict Minerals compliant.

Best balance of torque, torsional stiffness, and misalignment in the industry
Speeds up to 10,000 rpm due to a balanced design
Bellows and disc couplings with bores up to 1-3/4 in or 45 mm
Ratings validated through thorough physical testing
Carefully manufactured in Ruland’s advanced manufacturing facility in Marlborough, Massachusetts