Bellows couplings combine stainless steel bellows and aluminum hubs to offer superior performance in motion control applications. The bellows are made of stainless steel, which makes them ideal for transmitting torque. Due to the bellows' thin walls, the coupling is able to flex easily while remaining rigid under torsional loads. Parallel misalignment, angular misalignment and axial motion are accommodated by bellows.

The combination of aluminum hubs with the bellows results in an extremely lightweight, low inertia coupling. Zero backlash and a long, maintenance-free life are assured since the coupling has no moving parts. An important feature of the bellows coupling is a balanced design to reduce vibration in high rpm applications.

Ruland bellows couplings are offered in six sizes with set screw or Nomar® clamp style hubs and bores ranging from 1/8" (3mm) to 1" (25mm). Stainless steel hubs, keyways, and other custom features are available by special order.

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.