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Higher torque bellows and disc couplings

25 June 2024

NOW AVAILABLE from Ruland are bellows and double disc couplings with bore sizes up to 45mm or 1-3/4in for use in systems with torque up to 158Nm (14000in-lbs).

High torque applications commonly found in precision semiconductor, solar, conveyor, 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 design for reduced vibration at speeds up to 10,000rpm.

Ruland bellows couplings have the highest size-for-size torque and torsional stiffness capacity of Ruland flexible couplings. They are comprised of two anodised aluminium hubs mated to stainless steel bellows. The thin walls of the bellows allow them 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 anodised aluminium hubs, two sets of disc springs, and an anodised aluminium centre 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 higher 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 physical 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 products."

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

UK distributor: www.acorn-ind.co.uk/ruland