When performing a shaft alignment procedure, what type of misalignment is corrected first?

The correct approach in shaft alignment procedures prioritizes the correction of parallel misalignment first, as it is crucial for ensuring that the shafts are aligned in a way that optimizes the working conditions of the machinery. Parallel misalignment refers to the condition where the parallel axes of two shafts do not line up, which can cause significant wear and tear on the couplings and bearings.

Once parallel misalignment is corrected, it allows for more precise adjustments of angular or vertical misalignments. This sequential approach facilitates a smoother operational process and reduces potential mechanical issues down the line. The adjustment of angular misalignments, whether horizontal or vertical, is often contingent upon the shafts being correctly aligned in parallel. Therefore, while vertical angular adjustment is important, focusing on parallel misalignment first creates a solid foundation for the overall alignment and performance of the equipment.