What are the misalignment types checked during the procedure for aligning two shafts?

When aligning two shafts, the assessment of angular and parallel misalignment is crucial because these two misalignment types can significantly impact the performance and lifespan of the machinery involved.

Angular misalignment occurs when the shafts are not aligned in a straight line but form an angle at the coupling. This can lead to uneven wear, increased vibration, and stress on the components, ultimately causing premature failure.

Parallel misalignment, on the other hand, happens when the shafts are offset along the same axis but do not meet at a point, creating a gap or space between them. This misalignment can also lead to similar issues but manifests differently, affecting the coupling's efficiency and the overall operation of the system.

Together, checking both angular and parallel misalignment ensures that the shafts are correctly aligned for optimal performance, reducing the risk of operational issues and prolonging the life of the equipment. Other options presented do not directly address the specific types of misalignment that crucially affect shaft alignment procedures.