Which type of shaft misalignment is corrected first when performing a shaft alignment procedure?

In a shaft alignment procedure, the initial correction involves addressing vertical angular misalignment. This type of misalignment occurs when the shafts are at different angles in the vertical plane, which can lead to uneven wear and increased stress on the machinery components.

Correcting vertical angular misalignment first is crucial because it establishes a proper angular relationship between the two shafts. If this type of misalignment is not adequately addressed, subsequent adjustments for horizontal parallel misalignment or axial misalignment may become ineffective, as the shafts still have a mismatched angle. This foundational step helps ensure that the shafts will operate more efficiently, reducing vibration and prolonging the lifespan of the equipment.

After addressing the vertical angular misalignment, adjustments for horizontal parallel and axial misalignment can be made more effectively, as the vertical alignment provides a stable baseline for those corrections.