What type of coupling is ideal for misaligned shafts?

Flexible couplings are designed specifically to accommodate misalignments between shafts. They allow for both angular and parallel misalignment, effectively reducing stress on connected components and allowing for smoother operation. The construction of flexible couplings typically includes elements such as rubber, springs, or other compliant materials, which enable them to absorb shocks and vibrations while maintaining a connection between the two shafts.

In contrast, rigid couplings are not suitable for misalignment as they create a solid connection that does not permit any angular or parallel misalignment without causing excessive stress or potential damage. Flanged couplings are primarily used for aligning shafts accurately and do not address the need for flexibility. Universal joints can accommodate angular misalignment but are not as effective in situations where shafts need to be misaligned in multiple directions or require compensating for minor shifts continuously. Thus, flexible couplings stand out as the best choice for scenarios with misaligned shafts.