What is an advantage of using cross-dial alignment?

Cross-dial alignment is a method used in the alignment of rotating machinery where two dial indicators are positioned at a perpendicular angle to each other on the machine's shaft. One of the main advantages of this method is that axial float, which refers to the movement of the shaft in a direction parallel to its axis, does not significantly affect the readings obtained during the alignment process.

When using cross-dial alignment, the indicators measure any misalignment accurately, regardless of minor shifts along the axial direction. This characteristic makes cross-dial alignment particularly useful in cases where equipment may have some degree of axial float due to thermal expansion or other operational factors. The ability to still achieve reliable alignment data in such conditions helps ensure that the machinery operates smoothly and efficiently, reducing wear and tear on components.

In contrast, methods that do not account for axial float may yield misleading results if such movement occurs, leading to potential alignment issues that could affect machinery performance or lifespan. Thus, the ability of cross-dial alignment to remain unaffected by axial movement is a significant advantage that enhances precision in machinery installation and maintenance.