Oldham couplings are ideal for many motion control applications. Comprised of aluminum hubs with drive tenons that mate to a torque transmitting plastic disc, their design allows for easy sliding to accommodate misalignment with a very light bearing load. Oldham couplings also have the advantages of electrical isolation, low inertia and a balanced design for higher rpm applications. While the couplings accommodate a small amount of angular and axial misalignment, they are especially useful in applications with parallel misalignment.

Oldham couplings are offered in seven sizes of set screw or clamp style hubs with bore from 1/8" (3mm) to 1" (25mm). The hubs are anodized for improved lubricity and increased life. The replaceable center discs are available in two materials to suit different applications. Nylon discs are compliant to dampen vibrations and reduce noise. Acetal discs are designed for precision applications requiring zero backlash and high torque capacity. Since the discs are replaceable, they may be used as a torque limiter.

Learn more about how to choose a servo coupling for your particular application from a Ruland expert. Read "What to Look for in a Servo Coupling" written by William Hewitson, director of manufacturing.

Keyways are available in the oldham coupling as well. Shown here, alongside a jaw coupling with keyways.