Ruland Manufacturing has expanded its line of bellows couplings to include an outer diameter of 57 mm, allowing for larger bore sizes and increased torque and torsional stiffness capabilities. Designers prefer to specify bellows couplings in servo driven systems due to their high accuracy and repeatability. This size expansion now allows for bore sizes up to 32 mm in a clamp style design with or without keyways. Ruland bellows couplings are an assembly of two hubs and a thin-walled metallic bellows. Hubs are manufactured from aluminium for light weight and low inertia. They are joined together by a thin walled stainless steel bellows, allowing the coupling to remain flexible under high torsional loads. Bellows couplings can accommodate all forms of misalignment and size for size have the greatest torque and torsional stiffness capability in Ruland's servo coupling product line.
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