Which coupling type accommodates the most torsional misalignment?

The grid coupling is designed to accommodate significant torsional misalignment while maintaining the connection between shafts. This type of coupling features a flexible element in the form of a grid-like member that allows for movement and absorbs shocks, making it particularly effective in applications with variable conditions that lead to misalignment.

Compared to other types of couplings, the grid coupling's design is inherently more forgiving, allowing for greater angular and parallel misalignment. This flexibility not only helps extend the life of connected machinery by reducing the stresses transferred through the coupling but also aids in protecting against premature wear of bearings and other components.

In contrast, rigid couplings do not allow for any misalignment, transferring all loads directly between shafts without accommodating any variation. Spline couplings, while allowing for slight axial movement, do not handle torsional misalignment effectively. Cylinder couplings offer limited flexibility and are often used in applications where precise alignment is ensured. Thus, the grid coupling stands out as the best choice for accommodating significant torsional misalignment.