A Wider Range of Bellows Couplings

The range of bellows couplings has been extended by Ruland with an external diameter of 57 mm and holes up to 32 mm; they are ideal for linear applications in various industrial sectors, such as robotics and printing industry. Thanks to the absence of moving elements, these joints are free of play and maintenance-free.

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.

Zero-backlash and maintenance-free

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. The increased range gives bellows couplings consistent outer diameters and bore sizes with other Ruland servo couplings including disc, jaw, and Oldham couplings. They are characterized by high precision and they are ideal for linear applications commonly found in printing, semiconductor, solar and robotics. They are zero-backlash and have no moving parts for a long maintenance-free life. Ruland manufactures bellows couplings with a balanced design for reduced vibration at speeds up to 10,000 rpm. They are available in inch, metric, and inch to metric bore sizes, with or without keyways from 1/8 inch to 1-1/4 inch and from 3 to 32 mm. Non-standard designs such as special bore sizes, custom bore tolerances, and stainless-steel hubs are available upon request. Bellows couplings are part of Ruland’s motion control coupling product line which also includes beam, Controlflex, disc, Oldham, slit and zero-backlash jaw couplings.