Zero Backlash Miniature Fairloc® Bellows Couplings

Featured Product from Stock Drive Products & Sterling Instrument - SDP/SI

Hicksville, NY - SDP/SI, a leader in comprehensive mechanical solutions for critical motion control applications is pleased to introduce a new line of couplings. SDP/SI's Miniature Fairloc® bellows couplings are zero backlash, easy to install and corrects for angular and parallel axis misalignment. Readily repositioned, the miniature couplings dampen vibration and noise making them a perfect choice for medical device manufacturers.

Because of its compact design and high-quality build the miniature coupling series S50FP9-FB... inch series and S50FP9MFB... metric series and is durable and allows connections in restricted spaces. Both inch and metric dimensioned parts are offered and a variety of bore combinations are available, ranging from 3 mm to 12 mm and .0625" to .125". The hubs feature the unique Fairloc® design, capable of maintaining shaft alignment when others fail. Learn more at

"Fairloc® is an easy method of fastening rotating components", says Cris Ioanitescu, Application Engineer and Customer Service Manager, "Fairloc® can be tightened and released repeatedly without affecting its torque transmitting capacity; it will not mar the shaft and provides outstanding reliability." 

Miniature Fairloc® bellows couplings are the newest addition to the extensive coupling line offered by SDP/SI. Both rigid and flexible varieties are available, including modular bellows, beam, disk, jaw, Oldham and slit types. To assist clients in locating the perfect coupling for an application, SDP/SI provides a coupling selector tool that is available here.

SDP/SI offers a wide variety of inch and metric small mechanical components for the design engineer and OEM. Standard components can easily be located and purchased in one convenient place, shop online 24/7. The engineer not only meets all his component requirements, but saves valuable time by not having to search other sources. For custom design and manufacturing, speak to our engineers at (516) 328-3300.

Quotes, online orders, and 3D CAD models are available at our estore at

SDP/SI - Stock Drive Products/Sterling Instrument, a Designatronics company
250 Duffy Avenue, Hicksville, NY 11801
Phone: (516) 328-3300; (800) 819-8900