German igus coupling igus model igus price

igus couplings utilize their mechanical design to enable continuous rotation of two connected shafts and reliably transmit torque and motion, even when the shafts are not coaxial and have an axis angle. The most significant feature of universal joints is their high angular compensation capability, compact structure, and high transmission efficiency. The axis angle varies with different structural types of universal joints, generally ranging from 5° to 45°.

igus coupling structure

There are two main structural forms of couplings: (1) alignment via fitted bolts in reamed holes, with the bolt shank transmitting torque through compression and shear; (2) alignment via the fit between a shoulder on one half-coupling and a groove on the other. Bolts connecting the two half-couplings can be grade A and grade B standard bolts, with torque transmitted by the frictional moment at the mating surfaces of the half-couplings. Flange coupling materials can be gray cast iron or carbon steel; for heavy loads or circumferential speeds greater than 30 m/s, cast steel or forged steel should be used. Depending on the torque to be transmitted, all bolts on the flange can be fitted bolts, or half can be fitted bolts and the other half standard bolts.

igus coupling features

1) Misalignment compensation. The misalignment compensation of a coupling refers to its ability to compensate for relative displacement between two rotating components. Manufacturing and installation errors between connected components, temperature changes during operation, and load-induced deformation all impose requirements on misalignment compensation. This capability compensates for or mitigates additional loads on shafts, bearings, couplings, and other components caused by relative displacement between rotating components. 2) Damping. For applications with frequent loaded starts or varying working loads, the coupling must include elastic elements that provide buffering and vibration damping to protect the prime mover and driven machine from damage. 3) Safety and reliability, with sufficient strength and service life. 4) Simple structure, easy to assemble, disassemble, and maintain.

igus coupling selection

Coupling type selection: When selecting a coupling type, consider the following. 1) Magnitude and nature of the torque to be transmitted, requirements for buffering and vibration damping, and the potential for resonance. 2) Degree of relative axial displacement caused by manufacturing and assembly errors, shaft loading, thermal expansion deformation, and relative motion between components. 3) Permissible outer dimensions and installation method, including the necessary operating space for assembly, adjustment, and maintenance. For large couplings, disassembly and assembly should be possible without axial movement of the shaft. Additionally, consider working environment, service life, lubrication, sealing, and economic factors, and refer to the characteristics of various coupling types to select a suitable coupling.

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