Expanded inch-to-metric range of rigid couplings from Ruland

Ruland Manufacturing is giving users access to a wider range of off-the-shelf couplings by expanding its inch-to-metric stand coupling product line with new rigid couplings.

This expansion is the latest addition to the company’s inch-to-metric, standard coupling product line that includes seven types of motion-control couplings and universal joints. Instead of re-machining or ordering custom-made couplings, using off-the-shelf, inch-to-metric rigid couplings can save time and money.

Ruland rigid couplings often are used to connect motors or gearboxes to ball screw or lead screw linear actuators. Many designers prefer them because they have higher accuracy and can transmit significantly more torque than equivalently sized flexible couplings. One-piece style couplings allow for a simpler installation, while the two-piece style has a balanced design for smoother operation at speeds up to 4000 rpm.

The company supplies clamp-style couplings with premium hardware that test beyond ISO strength class 12.9 standards. They also have Ruland’s proprietary Nypatch anti-vibration coating to maintain holding power and torque capabilities in most industrial operating environments.

“Ruland is well known in the flexible coupling world for having the widest range of standard bore sizes, including inch-metric options – says Bill Hewitson, president of Ruland Manufacturing -. Expanding our rigid coupling line to incorporate these inch-metric combinations gives engineers designing with Ruland products more flexibility to use the coupling that best fits their application, be it a rigid or flexible type”.

Ruland manufactures couplings from meticulously selected North American bar stock in 2024 aluminium for lightweight and low inertia, 1215 lead-free steel for the highest torque capacity, and 303 stainless steel for corrosion resistance. Rigid couplings are made in Ruland’s ISO 9001:2015 certified manufacturing facility in Marlborough, Massachusetts, USA, under strict quality controls using proprietary processes. The couplings are RoHS3, REACH and Conflict Minerals compliant.

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