What tool can be used to check proper alignment between two shafts?

The use of a straight edge and feeler gauge is a practical method for checking the alignment between two shafts. This approach involves placing a straight edge across the shafts to identify any misalignment visually. The feeler gauge is then used to measure the gaps between the straight edge and the shafts at various points, providing precise measurements to determine if proper alignment is achieved.

This method is particularly useful because it allows for a hands-on evaluation of alignment without relying on electronic tools, making it accessible and cost-effective for many maintenance scenarios. It also provides immediate feedback about any discrepancies that need to be addressed.

While other tools have their specific applications, they may not offer the same straightforward assessment for alignment as the combination of a straight edge and feeler gauge provides. Laser alignment tools, for instance, are highly accurate and ideal for more advanced alignment needs, but they can be more complex and costly. Rulers and protractors or digital calipers may assist in measuring distances or angles but do not provide the same level of detail specifically focused on the alignment of shafts.