Huco Dynatork Oldham stainless steel couplings

Huco Dynatork’s Multi-Beam, Single Beam and Flex-P couplings are all available in stainless steel as is a wide selection of its universal joints, rod ends, linkages, gears, clevises, ball and socket joints and leadscrews.

For applications in food and pharmaceutical manufacture where principle considerations are zero backlash, high torsional stiffness and constant low bearing loads, Huco Dynatork’s Oldham stainless steel is suitable. The performance qualities are complemented by generous accommodation of misalignment. It is introduced in a choice of diameters from 19 to 50 mm, with set screw or clamp fixings; hubs are through-bored.

The Oldham is precision engineered throughout and comprises two hubs with inward-facing tenons. These engage with matching slots spaced at 90° in a central lightweight torque disc. As the coupling rotates, the disc compensates for any parallel shaft offset by sliding the commensurate distance along each tenon in turn. A hard, low-friction facing on the working surface guarantees long, backlash-free operation.

Quality of motion is a function of the carefully controlled relationship between the tenons and the torque disc. The disc is precision moulded from high-grade engineering polymers and, being easily replaced at low cost, is the sacrificial element in the drive train; radiation and heat-resistant torque discs are also available. If severely overloaded the torque disc will break, acting as a mechanical fuse, thereby protecting associated equipment from damage. A replacement torque disc quickly restores the drive without the need to dismantle the drive system.

Typical applications range from the incremental control of fluid valves to positional systems in machinery, robots and slide tables. They can also be applied to microstepper and closed loop servo systems and, to a lesser extent, half- and full-step motor drives.